WorksheetsFinding the Limiting Reactant and Calculating Excess
Total questions: 14
Worksheet time: 59mins
Balance the following equation:
__CO2 + __H2O -------> __C6H12O6 + __O2
Write down this equation.
1, 6, 1, 6
1, 1, 6, 6
6, 6, 1, 6
2, 1, 6, 1
What is the molar mass of CO2 ?
40.02 g
44.01 g
28.01 g
67.45 g
What is the molar mass of C6H12O6 ?
180.16 g
29.02 g
82944 g
72.066 g
What is the mole ratio that relates the amount of CO2 to the amount of C6H12O6 ?
Use your balanced equation from number 1.
6 mol C6H12O6 / 1 mol CO2
2 mol C6H12O6 / 6 mol CO2
6 mol C6H12O6 / 6 mol CO2
1 mol C6H12O6 / 6 mol CO2
How many grams of C6H12O6 can be produced from 25.0 g of CO2 ?
Sig figs matter!
Use your balanced equation from number 1.
614 g
614.04 g
17.1 g
17.056 g
Balance the following equation:
__KOH + __H3PO4 -----> __K3PO4 + __H2O
Write down this equation.
2, 6, 1, 3
1, 1, 3, 3
3, 1, 1, 1
3, 1, 1, 3
What is the molar mass of KOH ?
630 g
56.11 g
55.10 g
40.11 g
What is the molar mass of H3PO4 ?
98.00 g
47.98 g
95.98 g
97.00 g
What is the molar mass of H2O ?
18.16 g
16.13 g
17.01 g
18.02 g
What is the mole ratio that relates the amount of H2O to the amount of KOH ?
Use your balanced equation from number 6.
1 mol H2O / 3 mol KOH
3 mol H2O / 3 mol KOH
3 mol H2O / 1 mol KOH
1 mol H2O / 1 mol KOH
If you have 10.1 g KOH and 8.50 g H3PO4, how many grams of H2O can you make?
Sig figs matter!
Use your balanced equation from number 6 to answer this question.
4.69 g
3.24 g
29.2 g
4.24 g
What is the limiting reactant (LR) in this reaction?
KOH
H3PO4
K3PO4
H2O
What is the excess reactant (EX) in this reaction?
KOH
H3PO4
K3PO4
H2O
How much excess reactant (EX) is left over after the reaction is complete?
Sig figs matter!
Use your work for questions 6-13 to solve this.
5.88 g
8.50 g
4.69 g
2.62 g
