1. Section 10.1

2.  Balance skeleton equations  Balance word equations

3.  Chemical reaction  Reactants  Products  Coefficient  Chemical equation

4.  What are the diatomic elements?

5.  How many atoms of each element are in the following: ◦ HCl ◦ Na 2 S ◦ Ca 3 P 2 ◦ Mg(NO 3 ) 2

6.  Represents a chemical reaction ◦ Uses an arrow to separate reactants from products  Reactants ◦ Starting substances ◦ Left side  Products ◦ Ending substances ◦ Right side

7.  Skeleton ◦ Gives formulas ◦ H 2 + O 2  H 2 O  Word ◦ Gives names ◦ Hydrogen and oxygen react to form water

8.  Chemical equations MUST be BALANCED ◦ Law of Conservation of Matter  Number of atoms of each element must be equal on both sides of arrow  Only COEFFICIENTS can be used

9.  Number in front of a formula  How many atoms of each element are there in the following: ◦ 2HCl ◦ 4Na 2 S ◦ 3Ca 3 P 2 ◦ 2Mg(NO 3 ) 2

10. 1. H 2 + Cl 2  HCl 2. CO + O 2  CO 2 3. KClO 3  KCl + O 2

11. 1. Iron (III) chloride reacts with sodium hydroxide to form iron (III) hydroxide and sodium chloride 2. Carbon disulfide reacts with oxygen, producing carbon dioxide and sulfur dioxide 3. Zinc and sulfuric acid react to form hydrogen and zinc sulfate