1. Balancing Chemical Equations

2. Why do we need to Balance Chemical Equations? The Law of Conservation of Mass The # of atoms must stay the same on both sides of the equation The amount of mass is always the same. The Law of Conservation of Mass The # of atoms must stay the same on both sides of the equation The amount of mass is always the same.

3. How do we Balance Chemical Equations? We use coefficients to balance equations. Example- 2H2 +O2---> 2H2O total atoms= 4-H 2-O ---> 4-H 2-O We use coefficients to balance equations. Example- 2H2 +O2---> 2H2O total atoms= 4-H 2-O ---> 4-H 2-O