Limiting Reactants

What is a limiting reactant?

• the reactant that determines how much product can be made
• the reactant that is in excess
• the product that you can make the most of
• the amount of reactants that react with each other

When 12 moles of O₂ reacts with 1.1 mole of C₁₀H₈ what is the limiting reactant?  C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O

• Oxygen
• C₁₀H₈
• Water
• Carbon Dioxide

What is the limiting reactant if 16 moles of NH₃ and 30.0 moles of NO are combined?

4NH₃ + 6NO --> 5N₂ + 6H₂O

• NH₃

• NO

• N₂

• water

CH₄ + 2H₂O --> CO₂ + 4H₂

What is the limiting reactant when 20g CH₄ and 15g H₂O are combined? (CH₄ = 16.05 g/mol; H₂O = 18.02 g/mol)

• CH₄

• H₂O

• CO₂

• H₂

Fe + S --> FeS

If 7.62g Fe and 8.67g S are combined, what is the limiting reactant? (Fe = 55.85 g/mol; S = 32.07 g/mol)

• Fe

• S

• FeS

• none

SO₂ + PCl₅ --> SOCl₂ + POCl₃

How much SOCl₂ is produced when 16.2g SO₂ are combined with 13.7g PCl_5? (SO₂ = 64.07 g/mol; PCl₅ = 208.22 g/mol)

• 7.87g

• 30.1g

• 26.4g

• 19.8g

Cl₂ + 2KBr → Br₂ + 2KCl How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr) and 300 g of Cl₂?

• 749 g

• 223 g

• 479 g

• 814 g

Nitric acid can be neutralized by any base to form a salt and water, as in the following equation:

Mg(OH)₂ + 2 HNO₃ → Mg(NO₃)₂ + 2 H_­2O

How much magnesium nitrate salt will be formed by the reaction of 250 g magnesium hydroxide with 250 g nitric acid?

• 294 g

• 636 g

• 147 g

• 318 g