Introduction to Chemistry Substances, Mixtures and Solutions

Day 3 March 11 DRQ : What is a mixture? Make an educated guess about the difference between a mixture and element. Activities: DRQ\Review DRQ Demonstrations Review Chapter 9 pre-reading activity Vocabulary Homework: Crossword puzzle

DRQ: What is a mixture? Make an educated guess about the difference between a mixture and substance. A mixture is a combination of two or more elements or compounds The difference between a mixture and a substance is that a mixture is a combination of different substances. –A substance is a “pure” sample of a compound or an element

Demonstrations Substances –Salt (NaCl) –Sugar (C 12 H 22 O 11 ) –Distilled water (H 2 O) –Sand (SiO 2 Silicon dioxide) Mixtures –Salt water –Sugar water –Sand and water

Vocabulary for 9.1 Substance Matter that is an element or a compound –Element Substance in which all the atoms are alike –Compound Substance made of the combined atoms of two or more elements Mixture: Two or more substances together –Heterogeneous mixture A mixture in which different parts can be easily distinguished. –Homogeneous mixture A mixture in which different materials are blended evenly so that the mixture is the same throughout; also called a solution

Vocabulary for 9.1 cont. TYPES OF MIXTURES Solution A homogeneous mixture containing particles so tiny that they cannot be seen even with a microscope; particles in a solution don’t settle and don’t scatter light Suspension A heterogeneous mixture containing a liquid in which larger particles eventually settle out. Colloid A heterogeneous mixture containing tiny particles that never settle out; examples milk and gelatin

Vocabulary for 15.1 Solute The substance being dissolved in a solvent Solvent The substance that dissolves a solute Solubility The amount of a substance (solute) that will dissolve in a solvent Saturated A solution that has dissolved all the solute it can normally hold at a specific temperature Unsaturated A solution that is capable of dissolving more solute at a specific temperature Supersaturated An unstable solution that contains more solute than a saturated solution can at that

Play on Quizlet Go to Mrsdoughertys.wikispaces.com or compounds-and-solutions-flash- cards/

Day 4 March 12 DRQ: Pass around labeled items: copper foil, salt, Aluminum foil, chalk, granite, sugar water. Get a copy of the data table, and classify each as an element, compound, heterogeneous mixture or a homogenous mixture. Activities: DRQ\Review DRQ –Discussion questions If you know the name of a substance how can you find out whether it is an element? Cornell Notes for Chapter 9.1 pgs

DRQ # 13 Substance or mixture ElementCompound Heterogeneous Mixture Homogeneous Mixture Copper Foil √ Salt √ Aluminum Foil √ Purple Chalk √ Granite √ Sugar water √

Cool Supersaturated Solution Video 160 g solute Sodium Acetate Trihydrate Add 30 mL water solvent Heat to supersaturate solution Seed crystals to precipitate cool solution to crystallize

Discussion Questions If you know the name of a substance how can you find out whether it is an element?

Cornell Notes –Pages Keys to Success –Don’t forget study questions, words to know and the summary. –Use the headers to get the main points –Have complete thoughts in your notes and your summary If not finished in class - due tomorrow!

Day 5 March 13 No DRQ Take out your Cornell Notes and attach a rubric to them. If you didn’t do your homework, start your notes now.

Grader: ___________________________ Binder owner: __________________ Is their DRQ section complete? __< 50%___ about 75% ______ about 90% _____ 100% Notes Check if yes, nothing if no… –8.1 Cornell Notes –Triangle –8.3 Solids Liquids and Gases Notes/concept map –Matter and Temperature Study Guide –Behavior of Gases Notes –Gas Laws Chart –8.5 Behavior of Fluids Cornell Notes –Uses of Fluids Study Guide –DRQ table and Concept Map –Mixtures, Compounds and Solutions Pre-reading –Compounds vs. Elements –9.1 Cornell Notes Vocab Section –2 crossword puzzles Add up the check marks: _____________ out of 13 = _____________% DRQ = ___________% Notes and Vocab = _______________%

Grade each other’s notes Quiz on 9.1 postponed to Monday Binders Due Monday Study Vocabulary Fix/Complete Cornell Notes Quiz will be final grade of Marking period

Day 4 March 20 DRQ : On the front cart are two heterogeneous mixtures. A flinstones vitamin and “cheerios”. Both claim to have Iron in them. How could we find out which has more Iron?

Activities –Review DRQ –Return/Review Quiz Classwork/Homework –All Mixed UP Day 4 March 20

Day 5 March 23 DRQ: Explain three ways to separate a mixture. Activities: DRQ\Review DRQ Check Homework, Separating Mixtures (perform separation) Begin Cornell Notes pgs Online Separation activity

DRQ: Explain three ways to separate a mixture. Magnetism Solubility Size Color Texture Shape THESE ARE ALL PHYSICAL PROPERTIES!

Day 6 March 24 DRQ : What is the difference between a physical change and a chemical change? Activities: DRQ\Review DRQ Ch 9.3 Chemical Changes Review Differences between chemical and physical changes Homework: Cornell Notes pgs

DRQ: What is the difference between a physical change and a chemical change? In a physical change the matter doesn’t change or it is reversible. A chemical change creates a new type of substance or is irreversible. The particles are broken apart and put back together differently, making a new substance.

Day 1 March 25 DRQ: As you know, energy cannot be created or destroyed. This is the law of conservation of energy. What do you infer the law of conservation of mass might be? Activities: DRQ/Review DRQ Cornell Notes/Review Notes Study Guide…

DRQ: As you know, energy cannot be created or destroyed. This is the law of conservation of energy. What do you infer the law of conservation of mass might be? The law of conservation of mass is that mass/matter is not created or destroyed, it is only changed.

Day 2 March 26 DRQ: Make a list of physical changes that can occur in matter. (How many can you think of?) Activities DRQ/Return Notes/Collect Homework Physical Changes - List Chemical Changes and Conservation of Mass Demonstrations Physical and Chemical Changes T chart activity Lavoisier video clip Homework: Study for quiz tomorrow.

DRQ: Make a list of physical changes that can occur in matter. (How many can you think of?)

Antione Lavoisier and his wife, and research assistant, Marie-Anne Pierette Paulze

March 30 Day 4 DRQ: Open your book to page 416. Read about Types of Solutions. What are three types of solutions and an example of each? Activities: DRQ\Review DRQ Review Mini-Quiz on Physical and Chemical changes Solute, Solvent discussion (15.1) –Notes on 15.1 Closure: 15.1 Notes Summary Homework: How solutions form Study Guide

March 31 Day 5 DRQ: If you wanted to create a supersaturated solution, what would you have to do? Activities: DRQ\Review DRQ Lab activity: creating a solution, a saturated solution and a supersaturated solution. Closure: Cleanup and discussion Homework: Complete lab questions and illustrations

DRQ: If you wanted to create a supersaturated solution, what would you have to do? Make a saturated solution. –A solution that dissolved all the solute it can hold at a certain temperature. Add more solute. Heat it –Because adding heat increases the amount of solute you can dissolve –Stir it