(P) Limiting Reactants Review

This is what you call a reactant that you have enough of. The one that DOES NOT run out.

• Limiting Reactant

• Excess Reactant

• Highly Reactant

• Super Reactant

A limiting reactant is a reactant that.....

• runs out during a chemical reaction

• causes a reaction to stop

• determines the amount of products that can be made

• all of these

Using the following equation:

Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)

How many moles of iron can be made from 6 moles H₂ and excess Fe₂O₃?

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃.  If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

• AlCl3
• Cl2
• Al

What is the limiting reactant if 10 moles of NH₃  react  with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

• NH₃
• NO
• N₂
• water

How much water can be made if 8 moles of NH₃ react with 6 moles of NO?

4NH₃+6NO --> 5N₂ + 6H₂O

• 5 moles

• 6 moles

• 12 moles

• 18 moles

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich.  If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

• bread
• jelly
• peanut butter
• sandwich

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

Tags

NGSS.HS-PS1-7

3CaCO₃ + 2FePO₄ --> Ca₃(PO₄)₂ + Fe₂(CO₃)₃

Assuming we start with 100. g of CaCO₃ and 45 g of FePO₄, identify the limiting reactant. (CaCO₃ = 100.09 g/mol; FePO₄ = 150.82 g/mol)

• iron(V) phosphate

• calcium carbonate

• iron(III) phosphate

• calcium(II) carbonate

3CaCO₃ + 2FePO₄ --> Ca₃(PO₄)₂ + Fe₂(CO₃)₃

What is the maximum amount of each product that can be formed? (assuming 100. g CaCO₃ and 45 g FePO₄ from the previous problem are used)((CaCO₃ = 100.09 g/mol; FePO₄ = 150.82 g/mol; Ca₃(PO₄)₂ = 310.18 g/mol; Fe₂(CO₃)₃ = 291.73 g/mol)

• 85 g of calcium carbonate, 39 g of iron(III) phosphate

• 12.4 g of calcium phosphate, 27 g of iron(III) carbonate

• 37.2 g of calcium phosphate, 29.3 g of iron(III) carbonate

• 46.3 g of calcium phosphate, 43.8 g of iron(III) carbonate