1. Chapter 6.2 Describing Chemical Reactions

2. What are chemical reactions? They use formulas! – Abbreviated way to show atoms that are bonded together. NaOH and CO 2 – Lets review these first See Chemical Formulas Handout!

3. They also use equations! A chemical equation is like a recipe for a chemical reaction. 2 slices of bread1 spoonful of peanut butter 1 sandwich+ 

4. Chemical Equation Reactants + Reactants  Products + Products

5. Conservation of Matter Matter cannot be created nor destroyed! So you have to have the same number of atoms at the end of the reaction as you did at the beginning. Its like students at a dance, you should have the same # -- or else someone died or crashed the party!!!

6. Open vs. Closed Systems Open system: things can escape into the surroundings Closed system: things cannot escape.

7. 5 Types of Chemical RXNs