Do Now – Silent Reading 15 min. Read the article about Hydrogen Fuel on page 404 and answer questions 1 and 2 in your notebook.

2 Homework and Announcement Come see me after school if you have any questions about your grades and/or assignments. M/W until 3:30p - 5pm. Achieve 3000 – Your choice, choose 2 due 20 th Balancing Equations Worksheet Test Next Week 19 th /20 th 2

Textbook Questions and Review – p.387 (17.1) 1. Chemical Change because iron in the nail reacts with water to form a new compound (iron oxide Fe 2 O 3 ). Color change of the nail indicates a chemical change. 2. B 3. Physical Changes – energy is involved to change the size of a substance into smaller pieces. Chemical Changes – energy is involved in breaking and forming chemical bonds. 3

4. Answers: a) Chemical – new substance and a gas (CO 2 ) formed b) Physical – sand castle changes size and shape c) Chemical – egg white changes color as proteins are denatured. d) Physical – change of size occurs e) Chemical, the baked bread changes color as heat is used to bake it. f) Physical – Liquid water changes state to vapor (gas) Textbook Questions and Review – p.387 (17.1)

5. Types of indicators a)Color change b)Solid formed c)Cloudy water d)Gas/bubbles 6. Reactants listed on the left Products on the right Textbook Questions and Review – p.387 (17.1)

Textbook Questions and Review – p.397 (17.2) 1. Law of Conservation of Mass a)Total mass of the reactants equals the total mass of the products. Used to “balance” the equation. You can make predictions about how much of certain amount of reactant is needed to make a certain amount of product. 2. You need to work in a closed system so you can capture all of the product. In an open system gases could easily escape and be hard to quantify g – 9.3g = 0.7g of oxygen was produced in this reaction 4. A 5. Formula mass = is the total amu. Molar mass = mass of one mole of the compound in grams. 6

Textbook Questions and Review – p.397 (17.2) 6. Subscript: # of atom Coefficient: # of molecule or compound 7. Unbalanced v Balanced a)Unbalanced b)Unbalanced c)Balanced d)Balanced 7

L.O: SWBAT identify and classify different types of chemical reactions. Classifying Chemical Equations

Addition reactions two or more substances combine to form a new compound.

Addition reactions Polymerization: process of creating large molecules from small ones

Decomposition reactions A chemical reaction in which a single compound is broken down to produce two or more smaller compounds

Single Displacement one element replaces a similar element in a compound.

Double Displacement ions from two compounds in solution exchange places to produce two new compounds. Pb(NO 3 ) 2 + 2KI  PbI 2 + 2KNO 3

Precipitate: solid product that comes out of solution in a chemical reaction. cloudiness Evidence double-displacement reaction

CARBON! OUR BFF!

Pb(NO 3 ) 2 + 2KI  PbI 2 + 2KNO 3 Summary

Independent Work  Balancing Equation Worksheet  Read and Highlight Instructions  Complete practice problems  Achieve 3000 – choose 2 17