1. [

2. Limiting Reactant
This is the chemical that is used completely in a reaction.
Also called limiting reagent. [

3. Limiting Reactant Al2O3 + NaCl  AlCl3 + Na2O
If you have 18.0 moles of NaCl and 2.50 moles of Al2O3, which is the limiting reactant?
Hint: Solve reaction twice for same product. (AlCl3 for this demo…) 6 2 3

4. The reactant that creates the smaller amount is limiting!
Al2O3 + 6 NaCl  2 AlCl3 + 3 Na2O
18.0 mol NaCl
2 mol AlCl3
= 6.00 mol AlCl3
6 mol NaCl
The reactant that creates the smaller amount is limiting!
2.50 mol Al2O3
2 mol AlCl3
= 5.00 mol AlCl3
1 mol Al2O3

5. Limiting Reactant Na + CaCl2  NaCl + Ca 2 2
If you start with 57.5 g of Na and 111 g of CaCl2, how many grams of Ca will you have at the end of the reaction?
Hint: solve the question twice…

6. 2 Na + CaCl2  2 NaCl + Ca
57.5 g Na
1 mol Na
1 mol Ca
40.1 g Ca
23.0 g Na
2 mol Na
1 mol Ca
=50.1 g Ca
1 mol CaCl2
1 mol Ca
111 g CaCl2
40.1 g Ca
1 mol CaCl2
111.1 g CaCl2
1 mol Ca
=40.1 g Ca

7. Limiting Reactant 40.1 g of Ca is produced from the 111 g of CaCl2
The CaCl2 is the limiting reactant.