IN COLLECTION


Limiting Reactant

  • limiting reactant controls the amount of product that is formed in a chemical reaction
  • How do you calculate limiting reactant?
1) If necessary, convert reactants A & B to moles
2) Using the # of moles given for A, calculate how many moles of B would be needed to react.
3) Using the # of moles given for B, calculate how many moles of A would be needed to react.
4) Which reactant will you run out of first (the one where your NEED

exceeds what you are GIVEN)? This is your limiting reactant.


SiO2(s) + 4HF(g) ? SiF4(g) + 2H2O(l)

If 2.0 mol of HF is combined with 4.5 mol SiO2, which is the limiting reactant?







N2H4(l) + 2H2O2(l) ? N2(g) + 4H2O(g) (propellants used in some rockets)

What is the limiting reactant when 24.0 g of N2H4 reacts with 17.0 g of H2O2?
How many grams of excess reactant remain?
How many grams of water vapor are produced?
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