- 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.
(s) + 4HF(g) ? SiF4
(g) + 2H2
If 2.0 mol of HF is combined with 4.5 mol SiO2, which is the limiting reactant?
(l) + 2H2
(l) ? N2
(g) + 4H2
O(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?
- You synthesize 50.0 g of sodium with 60.0 g chlorine gas to produce table salt. Please identify your limiting reactant and your excess reactant.
2. In a single replacement reaction between 50.0 g of zinc and 30.0 g of hydrochloric acid. What is your limiting reactant? How many grams of zinc chloride is produced?
3. 40.0 g of sodium iodide are combined with 50.0 g of silver nitrate. What is the limiting reactant? How many formula units of sodium nitrate are produced?