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Worksheets23 LR and % Yield Quiz
Total questions: 12
Worksheet time: 49mins
The limiting reactant is the reactant that __________ .
slows down the reaction
is used up first
left over at the end of reaction
controls the speed of the reaction
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
17.7%
117.7%
84.9%
15.1%
4NH3 + 5O2 → 4NO + 6H2O
Based on reaction above, oxygen is a limiting reactant. Calculate the mass of NO formed if the mass of oxygen reacted is 1.80g.
0.37g
0.045g
1.35g
11.1g
What is a limiting reactant?
The reactant that determines how much product can be made
The reactant that is in excess
The product that you can make the most of
The amount of reactants that react with each other
If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
theoretical yield
limiting reactant
actual yield
percentage yield
excess reactant
In a lab, a scientist calculated that he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?
82.1%
22.8%
18.7%
12.2%
What is the actual yield?
the maximum amount of product from a reaction
the amount of product recovered from a lab experiment
amount of product that causes the reaction to stop
the amount of product needed to reverse the reaction
Cl2 + 2KBr → Br2 + 2KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?
749 g
223 g
479 g
814 g
In a lab, a scientist calculated that he should produce 12.3 grams of product in his experiment. When he is finished collecting his product, it weighs 10.1 grams. What is his percent yield?
82.1%
0.82%
10.1%
122%
4NH3 + 5O2 → 4NO + 6H2O
How many grams of NO are formed if 6.30 g of ammonia react with 1.80 g of oxygen?
0.370 g
0.0450 g
1.35 g
11.1 g
CH4 + 2H2O → CO2 + 4H2
How many grams of CO2 will form when 20.0 g of CH4 reacts with 15.0 g of H2O?
65.3 g
18.3 g
54.8 g
15.0 g
SO2 + PCl5 → SOCl2 + POCl3
How much SOCl2 is produced when 16.2 g of SO2 reacts with 13.7 g PCl5?
7.83 g
30.1 g
26.4 g
19.8 g
