1. Chap 8 Sect 2 Balancing Equations
Chemical Formulas must be
correct before balancing

2. Balancing Equations
2. Goal: to have equal numbers of each type of atom on both sides of the equation.

3. Balancing Equations
3. Balance by using COEFFICIENT (whole numbers) placed in FRONT of the Formulas. The coefficient multiplies everything in the formula.

4. Balancing Equations -- Do Not change the formula.
-- Do Not put a number inside a formula.

5. Balancing Equations
4. Coefficients represent the number of particles or moles.

6. Balancing Equations
5. Make sure that the coefficients are the most reduced ratio.

7. Balancing Combustion Rxns
Start with the carbons
Then do the hydrogen
Finally, balance the oxygen
Remember it by C, H, O

8. Odd-Even Balancing
When you end up with an odd number of an element on one side and an even number on the other, solve it by multiplying the things you balanced so far by 2.
This problem always occurs with alkanes (CnH2n+2) with even numbered carbons.

9. Polyatomic Ions in balancing
If the P.A.I. stays the same on both sides of the equation, consider the PAI as a unit (one thing), when counting atoms.