Limiting reactant

• What is meant by a limiting reactant?

  A limiting reactant is the reactant that is fully used up in a chemical reaction.
• How does a limiting reactant affect the amount of products in a reaction?

  The amount of product formed is determined by the limiting reactant.
• What is the balanced chemical equation for the reaction between magnesium and chlorine?

  • Magnesium + Chlorine → Magnesium Chloride
  • 1 mole of magnesium reacts with 1 mole of chlorine to produce 1 mole of magnesium chloride.
• What are the reactants in the reaction between magnesium and chlorine?

  The reactants are magnesium and chlorine.
• What is produced in the reaction between magnesium and chlorine?

  The product is magnesium chloride.
• If one mole of magnesium reacts with one mole of chlorine, how much magnesium chloride is produced?

  One mole of magnesium chloride is produced.
• What is the limiting reactant if we use 1 mole of magnesium and 0.5 moles of chlorine?

  The limiting reactant is chlorine.
• In a reaction where 0.5 moles of magnesium and 1 mole of chlorine are used, how much magnesium chloride is produced?

  0.5 moles of magnesium chloride are produced.
• How do you calculate the mass of a product formed from moles?

  Mass = number of moles × relative formula mass.
• What is the relative formula mass of zinc iodide?

  The relative formula mass of zinc iodide is 319.
• If 0.5 moles of zinc are used, how many moles of zinc iodide are produced?


  0.5 moles of zinc iodide are produced.
• What is the mass of 0.5 moles of zinc iodide?

  The mass is $0.5 \times 319 =$$159.5 \text{ g}$.
• In the reaction producing sodium chloride, what is the limiting reactant if 0.25 moles of hydrochloric acid are used?

  The limiting reactant is hydrochloric acid.
• How many moles of sodium chloride can be produced from 0.25 moles of hydrochloric acid?

  0.25 moles of sodium chloride can be produced.
• What is the mass of sodium chloride produced from 0.25 moles?

  The mass is $0.25 \times 58.5 =$$14.6 \text{ g}$.
• How many moles of copper are produced from 0.5 moles of copper sulfate and 1 mole of magnesium?


  0.5 moles of copper are produced.
• What is the mass of copper produced from 0.5 moles?

  The mass is $0.5 \times 63.5 =$$31.75 \text{ g}$.
• What are the key concepts related to limiting reactants in chemical reactions?

  • Limiting reactant: fully used up in a reaction.
  • Excess reactant: not fully used up.
  • The amount of product is determined by the limiting reactant.
  • Calculating mass: Mass = moles × relative formula mass.