1. Stoichiometry Mole-Mass Mass-Mass

2. Mass-Mole Problems Step 1: Write a BALANCED EQUATION Step 2: Determine your known & unknowns Step 3: Convert known mass to moles (molar mass-known) Step 4: Convert known mole to unknown mole (Mole-Mole ratio)

3. Mass-Mole Problems Example: 2 H 2 + O 2 2 H 2 O How many moles of water can be formed from 48.0 g O 2 ? 48.0 g O 2 1 mol O 2 2 mol H 2 O = 3.00 mol H 2 O 32.00 g O 2 1 mol O 2

4. Mass-Mole Practice CuSO 4 AlAl 2 (SO 4 ) 3 Cu323 ++ 13.5 g Al 1 mol Al 26.98 g Al = 0.751 mol CuSO 4 13.5 g Al 1 mol Al 2 (SO 4 ) 3 2 mol Al = 0.250 mol Al 2 (SO 4 ) 3 Mole ratio 3 mol CuSO 4 2 mol Al 1 mol Al 26.98 g Al How many moles of CuSO 4 are required to react with 13.5 g of Al? How many moles of Al 2 (SO 4 ) 3 are produced when 13.5g of Al react?

5. Mass-Mole Practice 5.7 g Ca 2 mol AlCl 3 3 mol Ca = 0.095 mol AlCl 3 5.7 g Ca 3 mol CaCl 2 3 mol Ca = 0.14 mol CaCl 2 CaAlCl 3 CaCl 2 Al322 ++ 1 mol Ca 40.08 g Ca 1 mol Ca 40.08 g Ca 3 How many moles of AlCl 3 are required to react with 5.7g of Ca? How many moles of CaCl 2 are produced when 5.7g of Ca react?

6. Mass-Mass Problems Step 1: Write a BALANCED EQUATION Step 2: Determine your known & unknowns Step 3: Convert known mass to moles (molar mass- known) Step 4: Convert known mole to unknown mole (Mole- Mole ratio) Step 5: Convert unknown mole to gram (molar mass- unknown)

7. Mass-Mass Problems Example: 2 H 2 + O 2 2 H 2 O How many grams of water can be formed from 48.0 g O 2 ? 48.0 g O 2 1 mol O 2 2 mol H 2 O = 32.00 g O 2 1 mol O 2 18.02 g H 2 O 1 mol H 2 O 54.1 g H 2 O

8. Mass-Mass Practice CuSO 4 AlAl 2 (SO 4 ) 3 Cu323 ++ 8.5 g Al 1 mol Al 26.98 g Al = 75 g CuSO 4 8.5 g Al 1 mol Al 2 (SO 4 ) 3 2 mol Al = 54 g Al 2 (SO 4 ) 3 Mole ratio 3 mol CuSO 4 2 mol Al 1 mol Al 26.98 g Al 1 mol CuSO 4 342.14 g Al 2 (SO 4 ) 3 1 mol Al 2 (SO 4 ) 3 159.61 g CuSO 4 How many grams of CuSO4 are required to react with 8.5g Al? How many grams of Al 2 (SO 4 ) 3 are produced when 8.5g Al react?

9. Mass-Mass Practice 1.9 g Ca 2 mol AlCl 3 3 mol Ca = 4.2 g AlCl 3 1.9 g Ca 3 mol CaCl 2 3 mol Ca = 5.3 g CaCl 2 CaAlCl 3 CaCl 2 Al322 ++ 1 mol Ca 40.08 g Ca 1 mol Ca 40.08 g Ca 133.33 g AlCl 3 1 mol AlCl 3 1 mol CaCl 2 110.98 g CaCl 2 3 What mass of AlCl 3 is required to react with 1.9g of Ca? What mass of CaCl 2 is produced when 1.9g of Ca react?