Unit 6M.1: Solubility
|
|
- Leo Lee
- 5 years ago
- Views:
Transcription
1 Unit 6M.1: Dissolving in water. Different solvents dissolve different substances. Science skills: Classifying Observing Predicting By the end of this unit you should: List factors affecting dissolving Give examples of solvents 75
2 6.11.1, , Materials Dissolving in water When you add sugar to a cup of tea, the sugar seems to disappear. You know it is still there because you can taste it. The sugar hasn t vanished, it has UdissolvedU. The substance that dissolves is called the UsoluteU (sugar). The liquid that it dissolves in is called the UsolventU (water). The mixture of solute dissolved in solvent is called a UsolutionU (tea). How to increase the rate of dissolving? To make the sugar dissolve faster, you can do the following: 76
3 How much sugar can you dissolve in water? Could you go on adding more and more, making the solution stronger and stronger? The answer is no. You would find that no more sugar will dissolve, no matter how long you stirred the mixture. When this happens, the solution is UsaturatedU. So there is a limit to how much solute can dissolve in a solvent. UMaking a saturated solution of salt in wateru. A solution is saturated when no more solute can be dissolved and some solid remains at the bottom. 77
4 Factors affecting dissolving Aunt Fatima likes sugar in her tea, but wants the sugar to dissolve quickly. She has heard that some types of sugar dissolve more quickly than others. Help her. Activity 1: Does the size of the sugar make a difference to how quickly sugar dissolve? Materials : 2 beakers, Spoon, Stop clock, Sugar cubes, Sugar grains, Hot water Procedure: 1- Weigh out 10 g of sugar cubes and sugar grains. 2- Measure 50 ml of water into each of two containers. 3-Add the cubes to one container and the grains to the other container. 4-Stir both containers at the same speed. 5-Time how long it takes for the sugar to dissolve in both containers. 78
5 Type of sugar Sugar grains Sugar cubes Time taken to dissolve (second) What do you observe? Conclusion: Activity 2: Does stirring make a difference to how quickly sugar dissolves? Materials: Sugar 2 beakers Water Glass stirring rod Procedure: 1-Measure 50 ml of water into each one of the two containers. 2-Add equal amounts sugar to each container of water. 3-Stir the first container but leave the other unstirred. 79
6 4-Time how long it takes for sugar to dissolve in both containers. Time taken to dissolve (second) sugar stirred sugar not stirred What do you observe? Conclusion: Activity 3: How temperature affects how quickly sugar dissolves? Plan an investigation to find out how the changes of water temperature affect how quickly sugar dissolves. Prediction: I expect that:
7 What I will do Results: Temperature of water ( C) Time taken to dissolve (second ) Use your results to draw either a bar chart or a line graph. (Do this on metric paper) 81
8 Conclusion: My results show that Activity 4: Does the type of solute affect how much will dissolve? Material: Bicarbonate of soda Salt, Sugar Six tea spoons Three clear plastic tumblers Water Sticky label and pen Procedure: 1- Label each of the tumblers (sugar), (salt), etc. half fill them with water and place a teaspoon in each. 2- Add a teaspoon full of sugar to the tumbler labeled sugar stir until the solid has dissolved. Now repeat this step in the other tumblers using bicarbonate of soda and salt. 82
9 3-Add more solid to each tumbler until no more will dissolve, count how many spoonfuls of solid dissolve in each tumbler. Results Substance No. of Spoonfulls What do you observe? Conclusion: So, factors affecting dissolving are: 1- Heating 2- Size of grains 3- Stirring 83
10 Activity: Which gas dissolved in air? Material: Tap water beaker Bunsen burner Producer: 1- Heat some tap water in a glass beaker. 2- Observe what Observation: 1- Before the water boiling What do you think the bubbles contain? How can you investigate the type of gas produced? Collect the gas produce? What is the smell of the collected gas? Where do you think the gas came from? Both nitrogen and oxygen come from the air, but oxygen is more soluble than nitrogen, so the gas that is boiled out of the liquid may be as much as 50% oxygen. The dissolved oxygen is essential for the survival of many organisms which live in water. 84
11 Materials Different solvents dissolve different substances Water is a very common solvent, but it is not the only one. There are many substances that are insoluble in water, but dissolve in other liquids. If you get grease or oil on your clothes, you can t wash it out with Uonly wateru because grease and oil are insoluble in water. But grease and oil dissolve in methylated spirits. Methylated spirits can be used to clean grease off things. Sugar and salt dissolve in water but will not dissolve in petrol. 85
12 Some substances, such as nail varnish, do not dissolve in water. Nail varnish is insoluble in water. If you want to remove nail varnish then you have to use a liquid called acetone. This is another type of solvent. The nail varnish is soluble in acetone. Which solvent will you l use? A marker pen has been used to write on the desk, how can you remove it? Which liquid removes the dye in the picture? Does the dye dissolve in water?
13 Which liquid is a good solvent for dye? Some felt-tip pens are filled with water proof ink. You can use them to label beakers or test tubes. The ink is insoluble in water, so it does not dissolve when it gets wet. To remove the ink you have to use alcohol, as a solvent since the ink is soluble in alcohol. 87
14 Key words Solvent Solute Solution Suspended React Do you know? Some clothes have to be dry-cleaned. The clothes are sprayed with a special solvent that dissolves grease and dirt. The solvent then evaporates, leaving the clothes clean. This is useful for cleaning fabrics that would be damaged by soaking them in water detergent. Key idea Some solids dissolve in water to form a solution. The water is the solvent, and the solid is the solute. If no more solid will dissolve, the solution is saturated. There is a limit to how much solute a solvent can take. You can speed up dissolving by crushing the solid, heating or stirring the liquid. 88
15 Key question 1-Write the scientific term for: a- The solid that dissolves. ( ) b- The liquid that does the dissolving. ( ) 2-There are three things you can do to speed up dissolving. What are they? Some breakfast cereals have a frosting of fine grains of sugar. Why do these cereals taste sweeter than ordinary cornflakes that have been sprinkled with granulated sugar? A beaker contains water. It is on a balance. The balance reads g. Nisreen adds 10.5 g of salt to the water. The salt dissolves. When all the salt has dissolved, what is the reading on the balance? g Nisreen wants to get all of the solid salt back from the water. Describe how she could do this
solvent diffusion dissolving soluble
What do we call it when a liquid changes into a solid? What do we call it when a liquid turns into a gas? What do we call it when a gas turns into a liquid? What do we call the solid that dissolves in
More informationChapter 25 Separating Mixtures
Chapter 25 Separating Mixtures A solution is formed when a solid dissolves in a liquid The solid is referred to as the solute. The liquid is referred to as the solvent. A dilute solution is one where there
More informationLondon Examinations IGCSE
Centre No. Paper Reference Surname Initial(s) Candidate No. Signature Paper Reference(s) 4335/03 4437/08 London Examinations IGCSE Chemistry 4335 Paper 3 Science (Double Award) 4437 Paper 8 Foundation
More informationSkills in Science. Lab equipment. (Always draw 2D) Drawings below are NOT to scale. Beaker - A general purpose container with a pouring lip.
Skills in Science Safety: Do NOT enter or leave the lab without permission from a teacher. Keep the gaps between tables clear of stools and bags. Never run in the lab. Do not throw things around in the
More informationCopper Odyssey. Chemical Reactions of Copper
Name Lab Partner(s) Copper Odyssey Chemical Reactions of Copper Date Period Elemental copper metal will be converted into copper (II) ion and then brought through a series of compound conversions until
More informationEXPERIMENT 5 Chemistry 110 COMPOSITION OF A MIXTURE
EXPERIMENT 5 Chemistry 110 PURPOSE: The purpose of this experiment is to determine the percent composition of a mixture. COMPOSITION OF A MIXTURE Most matter is a mixture of many substances. For example,
More informationIDENTIFYING UNKNOWN SUBSTANCES
IDENTIFYING UNKNOWN SUBSTANCES LAB 15 EXPERIMENT STUDENT BOOK Chapter 1, page 25 TOOLBOX Page 4 and 36 Goal Identify unknown substances with the help of different tests. 1. What is the independent variable
More informationGRADE 5: Materials 1. UNIT 5M.1 10 hours. Water. Resources. About this unit. Previous learning. Expectations. Key vocabulary and technical terms
GRADE 5: Materials 1 Water UNIT 5M.1 10 hours About this unit This is the first of two units on materials in Grade 5. The unit is designed to guide your planning and teaching of lessons on materials. It
More informationSIMPLE CHEMICAL REACTIONS
SIMPLE CHEMICAL REACTIONS 1. Magnesium burns in air giving a very bright light. (a) Complete the word equation below to show this reaction. magnesium +...... The diagram shows four gas-jars. Each contains
More informationPart A (Level 1) A Matching (4 marks, 1 mark each) B Multiple-choice questions (20 marks, 2 marks each) Name: ( ) Time and Marks Class: Date:
Unit 5 S1 Science Test The wonderful solvent - water Name: ( ) Time and Marks Class: Date: Part A: 35 min / 100 marks Parts A & B: 45 min / 120 marks Note: 1 Attempt ALL questions. 2 Write your answers
More informationYear 7 Chemistry HW Questions
Year 7 Chemistry HW Questions 37 minutes 56 marks Page 1 of 15 Q1. Molly used a ph sensor to test different liquids. She dipped the probe of the sensor into each liquid and recorded the ph value in a table.
More informationB D A C. response: it mixed with the water.
1. (a) Award ONE mark for correctly completing all four rows of the table: 1 Solid soil vitamin tablet plastic beads salt Beaker B D A C (b) Award ONE mark for a response indicating the solid dissolved:
More informationSTUDENT NAME. Science Grade 4. Read each question and choose the best answer. Be sure to mark all of your answers.
FORMATIVE MINI ASSESSMENTS Third Grading Period 2010-11 March 21-24 STUDENT NAME DATE Science Grade 4 Read each question and choose the best answer. Be sure to mark all of your answers. 1 In the circuit
More informationCambridge International Examinations Cambridge Primary Checkpoint
Cambridge International Examinations Cambridge Primary Checkpoint SCIENCE 0846/01 Paper 1 April 2016 Candidates answer on the Question Paper. Additional Materials: Pen Calculator Pencil Ruler 45 minutes
More informationAlgaculture & Biofuels: Exploration Experiments with Algae
Algaculture & Biofuels: Exploration Experiments with Algae Objective: 1. Students will be able to identify the resources algae need to survive and grow. o Students will be able to describe how algae responds
More informationRecrystallization with a Single Solvent
Experiment: Recrystallization Part II: Purification of Solids In Part I of the recrystallization experiment, you learned about the factors which make a good recrystallization solvent, and you learned how
More informationUNKNOWN UNKNOWNS Requirements: classify your functional group
UNKNOWN UNKNOWNS Candidates: ALCOHOLS Table 70.2, p. 766, 767 CARBOXYLIC ACIDS Table 70.1, p 764,765 ALDEHYDES Table 70.3, p. 767, 768 AMINES Table 70.5, p. 769, 770 KETONES Tabl e 70.14, p. 776 Requirements:
More informationExperimental techniques
Unit 1 Experimental techniques In this unit you will come to understand the general principles behind various experimental techniques. Experimental investigation is a very important aspect of Physical
More informationAQA Chemistry A-level
AQA Chemistry A-level Required Practical 10 Preparation of a pure organic solid, test of its purity, and preparation of a pure organic liquid Reflux Reflux: continuous boiling and condensing of a reaction
More informationThe table below shows some of the properties of the elements cobalt and nickel.
BELL RINGER The table below shows some of the properties of the elements cobalt and nickel. A scientist has a sample of metal that could be either cobalt or nickel. Which of the following properties could
More informationPREPARATION & ANALYSIS OF AN IRON COORDINATION COMPOUND PART A: PREPARATION OF AN IRON COORDINATION COMPOUND
Chemistry 112 PREPARATION & ANALYSIS OF AN IRON COORDINATION COMPOUND PART A: PREPARATION OF AN IRON COORDINATION COMPOUND A. INTRODUCTION In this experiment you will synthesize the iron coordination compound,
More information5 WATER. (iii) Temporary hard water (iv) Permanent hard water
5 WATER Question-Answers. Q. 1. Give two examples of : (i) Underground water (ii) Surface water. (i) Underground water Well water, spring water. (ii) Surface water River and lake water Q. 2. Briefly describe
More informationEXPERIMENT 3: Identification of a Substance by Physical Properties
EXPERIMENT 3: Identification of a Substance by Physical Properties Materials: Hot plate Digital balance Capillary tubes (3) Thermometer Beakers (250 ml) Watch glass Graduated Cylinder (10 ml) Mel-Temp
More informationAcids and alkalis/simple chemical reactions
Medway LEA Advisory Service Acids and alkalis/simple chemical reactions 7E & 7F 30 min 30 marks Q1-L3, Q2-L4, Q3-L4, Q4-L5, Q5-L6, Q6-L6 1. (a) Reshma had a mixture of iron filings and sand. What could
More information7.9.6 Magnetic Poles. 85 minutes. 117 marks. Page 1 of 37
7.9.6 Magnetic Poles 85 minutes 117 marks Page 1 of 37 Q1. The diagram shows an electromagnet used in a door lock. (a) The push switch is closed and the door unlocks. Explain in detail how this happens.
More informationINTERACTIVE SCIENCE 1B
INTERACTIVE SCIENCE 1B Workbook Solutions (Enrichment Edition) Chapter 5 THE WONDERFUL SOLVENT WATER Part A Sectional Exercise 5.1 Concept checking p.23 1. False 2. True 3. False 4. False 5. True Multiple
More information2. Crystallization. A. Background
2. Crystallization A. Background Crystallization is one of several available techniques available to purify organic compounds. Unlike other techniques, however, crystallization is specific to the purification
More informationCLASSI ICATION OF MAT R AND HOMOGENEOUS AND HETEROGENEOUS MIXTURES
Experiment 3 Name: CLASSI ICATION OF MAT R AND HOMOGENEOUS AND HETEROGENEOUS MIXTURES Classification of Matter A pure substance is matter with definite and constant composition with distinct chemical properties.
More informationBASIS Lesson Plan. *Note to teachers: Detailed standards connections can be found at the end of this lesson plan.
BASIS Lesson Plan Lesson Name: It s Just a Phase! Grade Level Connection(s) NGSS Standards: Grade 2, Physical Science FOSS CA Edition: Grade 3 Physical Science: Matter and Energy Module *Note to teachers:
More informationSeparating Mixtures WORKSHEETS
Attention Teachers KEEP IT SIMPLE SCIENCE Separating Year 7 Chemical Sciences WORKSHEETS KISS topic number Topic 03.7C KISS Worksheets are designed to consolidate students knowledge & understanding and/or
More informationTeknik Bioseparasi. Dina Wahyu. Genap/ Maret 2014
4. Teknik Bioseparasi Dina Wahyu Genap/ Maret 2014 Outline Chemical Reaction Engineering 1 2 3 4 5 6 7 Pendahuluan mempelajari ruang lingkup teknik bioseparasi dan teknik cel disruption Teknik Pemisahan
More informationYear 5 (Entry into Year 6) 2 Hour Revision Course Chemistry
Year 5 (Entry into Year 6) 2 Hour Revision Course Chemistry This page has intentionally been left blank. Lesson 1 Grouping materials (1 hour) Materials can be grouped together depending on their properties.
More informationStation 1 Dry Ice Experiments / Producing CO 2 in a reaction
Station 1 Dry Ice Experiments / Producing CO 2 in a reaction 1. WHAT IS DRY ICE Put a flat chunk of dry ice on the counter and see how easy it "floats" on top of the counter when you give it a small push.
More informationExperiment 21 - Solubility and Molecular Structure
Experiment 21 - Solubility and Molecular Structure Part 1 In this part of the experiment you will compare the solubilities of various substances in two very different solvents: water and cyclohexane. Recall
More informationPHYSICAL CHANGE OR CHEMICAL CHANGE?
PHYSICAL CHANGE OR CHEMICAL CHANGE? STUDENT BOOK Chapter 2, page 58 LAB 24 OBSERVATION TOOLBOX Pages 18 19, 32, 39 40 Goal Distinguish between a physical change and a chemical change. Observation criteria
More informationPOLLUTION SECTION 7-TESTING FOR HARD WATER From Hands on Science by Linda Poore, Westminster College
POLLUTION SECTION 7-TESTING FOR HARD WATER From Hands on Science by Linda Poore, 2003. Westminster College OBJECTIVES Students discover that common minerals in water can contribute indirectly to pollution
More informationLook at the measuring cylinders. What happened to the volume of the water and the wax after freezing? the volume of water... the volume of wax...
1. Meera poured 7 cm 3 of water into a measuring cylinder. She poured 7 cm 3 of melted wax into another measuring cylinder. She put both measuring cylinders into a freezer for 24 hours. water before freezing
More information*20GSD2101* Double Award Science: Chemistry. Unit C1 Foundation Tier THURSDAY 14 MAY 2015, MORNING [GSD21] *GSD21* TIME 1 hour.
Centre Number Candidate Number General Certificate of Secondary Education 2014 2015 Double Award Science: Chemistry Unit C1 Foundation Tier [GSD21] *GSD21* *G5802* *GSD21* THURSDAY 14 MAY 2015, MORNING
More information2. Crystallization. A. Background
2. Crystallization A. Background Crystallization is one of several available techniques available to purify organic compounds. Unlike other techniques, however, crystallization is specific to the purification
More informationClever crystals and solubility
19 Clever crystals and solubility Bunsen Burner Badge car 20 Clever crystals and solubility Suitable for: 11 14 years Curriculum and learning links: States of matter, separating mixtures Learning objectives:
More informationQuiz 2 practice Quiz
Name: ate: 1. The following data were recorded while determining the solubility of a certain salt. Temp. ( C) 10 20 30 40 50 Grams Solute/ 100 g H 2 O 30 33 36 39 42 Which graph best represents the solubility
More informationChanges for Organic Chemistry 2521 Labs
Changes for Organic Chemistry 2521 Labs Chapter 3 Crystallization Part 1 (Starts on page 56) Test the solubility of three compounds with three solvents. There are four compounds to choose from: 1. Resorcinol
More informationPurification Of A Solid By Recrystallization AND Identification By Melting Point Determination
Purification Of A Solid By Recrystallization AND Identification By Melting Point Determination Refer back to your recrystallization and melting point experiments. In this experiment you must purify your
More informationActivity 2.1 Curious crystals
Activity 2.1 Curious crystals Can you identify an unknown crystal by comparing its appearance to other known crystals? In this activity, students will carefully look at four known household crystals. After
More informationAdvanced Water Quality Monitoring and Analysis Life Science: Grades 7-12
Advanced Water Quality Monitoring and Analysis Life : Grades 7-12 Enduring Understandings 1. Understand and be able to list and describe important water quality factors (temperature, transparency, ph,
More informationChemistry. Freezing and Melting of Water ID: By Texas Instruments TEACHER GUIDE
Freezing and Melting of Water ID: 16150 By Texas Instruments TEACHER GUIDE Time required 90 minutes Topic: Phase Changes Relate freezing point and melting point. Interpret a heating or cooling curve. Describe
More informationS2 Chemistry. materials. do not write on these sheets
S2 Chemistry materials do not write on these sheets 1 2 3 MATERIALS Any substance can be described as a SOLID, LIQUID or a GAS. These are called the THREE STATES OF MATTER. 1. Solids Imagine you are building
More informationIntroduction to Water Quality Monitoring Life Science: Grades 4-8
Introduction to Water Quality Monitoring Life : Grades 4-8 Enduring Understandings 1. Understand and be able to list and describe important water quality factors (temperature, transparency, ph, electrical
More informationWater Phase Change Lab
Water Phase Change Lab by Skipper Coates Time Needed: About 40 minutes Background Knowledge Required: Students should know that the addition of heat speeds up molecules, resulting in phase changes. Materials
More informationEutrophication Using Up Oxygen In Water
Eutrophication Using Up Oxygen In Water Topic Water pollution causing oxygen depletion in water by living organisms Introduction Farming is a major cause of freshwater pollution. Sewage and farm animal
More informationNATURAL SCIENCES AND TECHNOLOGY TERM Contents
NATURAL SCIENCES AND TECHNOLOGY TERM 2 2017 Contents Unit 1: Arrangements of Particles: Solids, Liquids and Gases... 6 Lesson 1... 6 Solids... 6 Liquids... 6 Gas... 6 Activity 1... 7 Questions... 7 Unit
More information1. Which of the following elements has the highest percentage by mass in nature? A. Oxygen B. Aluminium C. Nitrogen D. Silicon
Class: F.3 ( ) Baptist Lui Ming Choi Secondary School First Term Examination (2013-2014) Date: 6 / 12 / 2013 Name: Form 3 Chemistry Time: 10:20-11:05 a.m. Answer ALL the questions. For Section A, choose
More informationSignificance of Water Observation Lab
Significance of Water Observation Lab It has been said that the chemistry of life is water chemistry. Because of its chemical properties, water is the medium in which most of life s chemical reactions
More information1. Marie mixed 5 g of carbon with 5 g of lead oxide. She heated the mixture strongly for 15 minutes in a fume cupboard.
1. Marie mixed 5 g of carbon with 5 g of lead oxide. She heated the mixture strongly for 15 minutes in a fume cupboard. After 15 minutes, Marie found some shiny beads in the mixture. a. (i) Marie collected
More informationCONSERVATION OF MATTER AND CHEMICAL PROPERTIES
1 CONSERVATION OF MATTER AND CHEMICAL PROPERTIES I. OBJECTIVES AND BACKGROUND The object of this experiment is to demonstrate the conservation of matter- or more particularly, the conservation of "atoms"
More informationES 106 Laboratory # 1 PROPERTIES OF WATER
ES 106 Laboratory # 1 PROPERTIES OF WATER 1-1 Introduction What are the physical and chemical properties of water that make it so unique and necessary for living things? When you look at water, taste and
More informationMinnesota Comprehensive Assessments-Series III
Name Minnesota Comprehensive Assessments-Series III Science Item Sampler Grade 8 ITEM SAMPLERS ARE NOT SECURE TEST MATERIALS. THIS ITEM SAMPLER TEST BOOK MAY BE COPIED OR 18 Point State of Minnesota Copyright
More informationTYPES OF CHEMICAL REACTIONS PART I INTRODUCTION
EXPERIMENT 10 (2 Weeks) Chemistry 100 Laboratory TYPES OF CHEMICAL REACTIONS PART I INTRODUCTION It is useful to classify reactions into different types, because products of reactions can be predicted.
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *7279389372* CHEMISTRY 06/06 Paper 6 Alternative to Practical October/November 07 1 hour Candidates
More informationSolutions and Crystallisation exam question
Solutions and Crystallisation exam question 2012 - Higher An experiment was performed to investigate the effect of temperature on the solubility of carbon dioxide in water. The data obtained from this
More informationAdministered December 2003
STUDENT NAME DATE ID GRADE 5 SCIENCE Administered December 2003 Page 1 5 th Grade Science Interim 2; SAISD Standard 23/32; TAKS Commended; 30/32 DIRECTIONS Read each question and choose the best answer.
More informationClass 4J Spring Term Unit 4D Solids, liquids and how they can be separated Adapted from QCA Science Unit 4D
Class 4J Spring Term 2003 Science Unit 4D Solids, liquids and how they can be separated Adapted from QCA Science Unit 4D ABOUT THE UNIT In this unit children learn about the differences between solids
More informationLesson note 5: Separation of Mixtures. Mixtures. Mixtures. Separation Methods: Many different types of mixtures Examples:
Lesson note 5: Separation of Mixtures Mixtures Many different types of mixtures Examples: - air (gas-gas mixture), - sea water(liquid-solid mixture), - crude oil (liquid-liquid mixture) The mixtures can
More informationItem 36 has not been slated for public release in 2011.
S Use the power-plant diagrams and information below to answer questions 35 37. Power Plants 35. Which describes a chemical change and a physical change that take place during the production of electricity
More information6. In this temperature time graph for the heating of H 2O at a constant rate, the segment DE represents the
1. Which of the following contains particles with the least freedom of motion? A) CO 2( ) B) HCl(aq) C) F 2(g) D) MgBr 2(s) E) C 6H 12O 6(aq) 2. During boiling, the temperature of a pure liquid substance
More informationThe Haberdashers' Aske's Boys School Elstree, Herts. 13+ Entrance Examination 2015
The Haberdashers' Aske's Boys School Elstree, Herts 13+ Entrance Examination 2015 CHEMISTRY Please follow these instructions The Science paper is divided into three sections (Biology, Chemistry and Physics).
More informationDNA in our Food? Extracting DNA from Strawberry Student Guide
DNA in our Food? Extracting DNA from Strawberry Student Guide Introduction: DNA extraction is a fundamental procedure used in a lab that is simple and effective. Extracting enough DNA to spool onto a rod
More informationCHEM 1215 LAB NOTES EXPT #2: PHYSICAL AND CHEMICAL CHANGES 1
CHEM 1215 LAB NOTES EXPT #2: PHYSICAL AND CHEMICAL CHANGES 1 TECHNIQUES: chemical and physical changes, reactions, observations READING: PHYSICAL AND CHEMICAL CHANGES e.g. Tro chapter 1 SAFETY: Safety
More informationI SCIENCE REVISION. 1. a) Draw an animal cell and plant cell. Label the parts
SCIENCE REVISION 1. a) Draw an animal cell and plant cell. Label the parts b) Write three differences between animal cell and plant cell 2) (a) Draw a line from each circuit symbol below to the correct
More informationAlgae Balls. Investigating Photosynthesis. Student Materials. Introduction Lab Protocol Data Collection Worksheet... 5
Algae Balls Investigating Photosynthesis Student Materials Introduction... 2 Lab Protocol... 4 Data Collection Worksheet... 5 Pre-Lab Questions... 8 Post-Lab Questions and Analysis... 9 Last updated: October
More informationYear 8 Reaction and Magnets HW Questions
Year 8 Reaction and Magnets HW Questions 31 minutes 44 marks Page 1 of 14 Q1. Different elements have a wide variety of properties. The list gives some of them. brittle good electrical conductor good thermal
More informationMINISTRY OF EDUCATION AND HUMAN RESOURCES, TERTIARY EDUCATION AND SCIENTIFIC RESEARCH MAURITIUS EXAMINATIONS SYNDICATE. CHEMISTRY OCTOBER hour
MINISTRY OF EDUCATION AND HUMAN RESOURCES, TERTIARY EDUCATION AND SCIENTIFIC RESEARCH MAURITIUS EXAMINATIONS SYNDICATE CANDIDATE NAME SCHOOL NAME CLASS/SECTION NATIONAL ASSESSMENT AT FORM III CHEMISTRY
More informationDNA The Stuff of Life
DNA Extraction 1 Name DNA The Stuff of Life Materials: Pea soup Rubbing alcohol Small beaker or cup Measuring spoon Meat tenderizer Detergent Test tube Coffee stirrer Procedure: 1. Fill your cup ½ full
More informationEXPERIMENTING WITH PHYSICAL PROCESSES
EXPERIMENTING WITH PHYSICAL PROCESSES Student s worksheets Anabel Borràs González January-April 2009 IS IT MAGNETIC? Which things will be attracted to the magnet? Object 2p coin Prediction: will it be
More informationPVA polymer slime. PVA polymer slime
PVA polymer slime PVA polymer slime A solution of polyvinyl alcohol (PVA) can be made into a slime by adding borax solution, which creates crosslinks between polymer chains. In this activity, some interesting
More informationMay 2018 for entry September 2018
May 2018 for entry September 2018 Information for Candidates: 1. Write your name and school on this page. 2. Write all of your answers in the spaces provided. If you need additional paper then please ask
More informationHERZLIA MIDDLE SCHOOL
NAME TEACHER S COMMENT TEACHER CLASS PARENT S COMMENT MARK PERCENTAGE PARENT S SIGNATURE HERZLIA MIDDLE SCHOOL GRADE 7 NATURAL SCIENCE MID-YEAR EXAMINATION 8 June 2015 TIME: 90 Minutes MARKS: 140 1 Grade
More informationDetermination of the Molar Mass of a Compound by Freezing Point Depression
Determination of the Molar Mass of a Compound by Freezing Point Depression Objective: The objective of this experiment is to determine the molar mass of an unknown solute by measuring the freezing point
More informationName: Year 3 Final Examination Revision sheet - 1
Name: Year 3 Final Examination Revision sheet - 1 Date: Plants 1 Sarah planted some sunflower seeds for her Science project. After a month, she observed healthy young sunflower plants growing but she did
More informationPorosity of Compost Water retention capacity of Compost Organic matter content of Compost Buffering capacity of Compost
Porosity of Compost Water retention capacity of Compost Organic matter content of Compost Buffering capacity of Compost by Page 1/21 Contents What is the effect of compost on soil properties?... 3 Introduction:...
More informationDETERMINATION of the EMPIRICAL FORMULA
DETERMINATION of the EMPIRICAL FORMULA One of the fundamental statements of the atomic theory is that elements combine in simple whole number ratios. This observation gives support to the theory of atoms,
More information1. PURPOSE This exercise examines some of the different plastics readily made in a laboratory setting and properties of some commercial plastics.
CIP1 PLASTICS Last Revised: February 2014 1. PURPOSE This exercise examines some of the different plastics readily made in a laboratory setting and properties of some commercial plastics. 2. REAGENTS &
More informationLab #4 Gravimetric Analysis of a Metal Carbonate (adapted from Flinn Scientific ChemFax, 2005)
Ms. Sonderleiter AP Chemistry Name: Date: Lab #4 Gravimetric Analysis of a Metal Carbonate (adapted from Flinn Scientific ChemFax, 2005) Background: In this experiment, an unknown alkali metal carbonate,
More informationScientist Guide. Nails for Breakfast? Introduction. Activity Overview. Materials
Scientist Guide Nails for Breakfast? Introduction The periodic table of elements contains many elements that are essential for life, including oxygen, carbon and nitrogen. But did you know that iron (Fe)
More informationLab 4: Recrystallization
Lab 4: Recrystallization Objectives: - Purify an impure sample of an antibiotic. - Practice the crystallization technique. Introduction: The purpose of this experiment is to introduce the technique of
More informationnot to be republished NCERT Every day you come across many Physical and Chemical Changes 6.1 PHYSICAL CHANGES Activity 6.1 Activity 6.2 Activity 6.
6 Physical and Chemical Changes Every day you come across many changes in your surroundings. These changes may involve one or more substances. For example, your mother may ask you to dissolve sugar in
More informationDo not write on the question paper, do not turn in the question paper. Put your answers on a new paper. Unless told otherwise.
APES Unit 2 Packet Due Sept 10 at the beginning of class Instructions for all homework and labs: Put your name and date on top right corner of all your papers. Put the name of the problem or lab at the
More informationlook down at cross on paper paper cross on paper
1 The equation for the reaction between sodium thiosulfate and hydrochloric acid is given below. Na 2 S 2 O 3 (aq) + 2HCl (aq) 2NaCl (aq) + S(s) + SO 2 (g) + H 2 O(l) The speed of this reaction was investigated
More informationE24 PURIFICATION OF ORGANIC COMPOUNDS Distillation, recrystallisation, melting and boiling point determination
E24 PURIFICATION OF ORGANIC COMPOUNDS Distillation, recrystallisation, melting and boiling point determination THE TASK To learn the main techniques of purifying organic compounds. THE SKILLS By the end
More information1 Elements. TAKE A LOOK 2. Identify Look at the illustration and identify one source of iron that comes to Earth from somewhere else.
CHAPTER 4 1 Elements SECTION Elements, Compounds, and Mixtures BEFORE YOU READ After you read this section, you should be able to answer these questions: What is an element? How do elements differ from
More informationThe Crystal Forest Favorite Holiday Demonstrations
The Crystal Forest Favorite Holiday Demonstrations SCIENTIFIC Introduction Put a new twist on crystal growing. In this class participation demonstration, students cut out and assemble miniature trees and
More informationA Cycle of Copper Reactions
EXPERIMENT A Cycle of Copper Reactions PURPOSE To demonstrate a series of copper reactions: starting with copper metal, oxidizing the metal to put it into solution and then, form a copper hydroxide, an
More informationYEAR 7 SCIENCE EXAMINATION. Semester MULTIPLE CHOICE QUESTION BOOK 1 MATERIAL REQUIRED / RECOMMENDED FOR THIS PAPER:
YEAR 7 SCIENCE EXAMINATION Semester 2 2016 MULTIPLE CHOICE QUESTION BOOK 1 STUDENT NAME: TEACHER: DATE: Time allowed for this exam: (Book 1 and Book 2 Combined) Reading time before commencing work: Working
More informationCalculating energy changes from burning fuels
Calculating energy changes from burning fuels TEACHERS AND TECHNICIANS NOTES Specification reference: C3.3.1 Energy from reactions (a) The relative amounts of energy released when substances burn can be
More informationCH241 Experiment #1 (Weeks of September 11, 18, and 25, 2017)
CH241 Experiment #1 (Weeks of September 11, 18, and 25, 2017) SEPARATION AND RECOVERY OF ORGANIC COMPOUNDS, THIN LAYER CHROMATOGRAPHY, COLUMN CHROMATOGRAPHY, CRYSTALLIZATION, AND MELTING POINTS Overview
More informationLab 4: Recrystallization
Lab 4: Recrystallization Pre Lab Question: (Answer submitted in a separate piece of paper at the beginning of lab) 1. Calculate how much 95% ethanol will be required to dissolve 0.8 g of sulfanilamide
More informationExperiment: Measurements
Experiment: Measurements I. INTRODUCTION Measurements are essential to experimental sciences such as chemistry, physics, biology, and geology. The measurements are usually made using the metric system
More informationSignificance of Water Observation Lab
Significance of Water Observation Lab It has been said that the chemistry of life is water chemistry. Because of its chemical properties, water is the medium in which most of life s chemical reactions
More informationCALLING ALL HOUSEHOLDS!
CALLING ALL HOUSEHOLDS! WOULD YOU LIKE TO HELP ME SLIM DOWN? Ireland produces way more waste per person than European Average! By reducing, reusing, recycling and composting you can make a HUGE difference.
More information