1. Excess-Limiting Reaction Practice 2 Al + 6 HCl  2 AlCl 3 + 3 H 2 25 g of aluminum are reacted with 75 g of hydrochloric acid, what mass of hydrogen gas is produced? Solution: compare Limiting = HAVE < NEED Limiting Excess Use the Limiting Reactant: HAVE NEED (1) © Mr D Scott; CHS

2. Excess-Limiting Reaction Practice 2 K + F 2  2 KF 5.0 g of potassium are reacted with 5.0 g of fluorine; what mass of potassium fluoride is produced? Solution: Compare Limiting = HAVE < NEED Limiting Excess Use the Limiting Reactant: HAVE NEED (2) © Mr D Scott; CHS

3. Excess-Limiting Reaction Practice 2 H 2 + O 2  2 H 2 O 7.0 g of hydrogen gas are reacted with 52 g of oxygen gas, what mass of water is produced? Solution: compare Limiting = HAVE < NEED Limiting Excess Use the Limiting Reactant: HAVE NEED (3) © Mr D Scott; CHS

4. Excess-Limiting Reaction Practice AlCl 3 + 3 NH 4 F  AlF 3 + 3 NH 4 Cl 12 g of aluminum chloride are reacted with 11 g of ammonium fluoride, what mass of ammonium chloride is produced? Solution: Compare Limiting = HAVE < NEED Limiting Excess Use the Limiting Reactant: HAVE NEED (4) © Mr D Scott; CHS