WorksheetsLIMITING REACTANT QUIZ
Total questions: 12
Worksheet time: 26mins
Name
Class
Date
1.
What is a limiting reactant?
a)
the reactant that limit the amount of product formed
b)
the reactant that is in excess
c)
the product that you can make the most of
d)
the amount of reactants that react with each other
2.
The limiting reactant
a)
slows the reaction down
b)
is used up first
c)
is the reactant that is left over
d)
controls the speed of the reaction
3.
When does a chemical reaction stop?
a)
When the lab is finished
b)
When the excess reactant is used up
c)
When the limiting reactant is used up
d)
Chemical reactions never stop
4.
What is the first thing you must do to solve a stoichiometry problem?
a)
Write a Balanced Equation
b)
Panic
c)
Write an Unbalanced Equation
d)
Avogadro's Number
5.
Balance the following reaction :
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
a)
1,2,2,2
b)
1,2,1,1
c)
2,1,1,1
d)
2,1,2,1
6.
Use the equation 2 Al + 3 Cl2 ---> 2 AlCl3. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.
a)
AlCl3
b)
Cl2
c)
Al
7.
When 12 moles of O2 reacts with 1.1 mole of C10H8 what is the limiting reactant? C10H8 + 12 O2 --> 10 CO2 + 4 H2O
a)
Oxygen
b)
C10H8
c)
Water
d)
Carbon Dioxide
8.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
9.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
10.
What is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?
4 NH3+6 NO --> 5 N2 + 6 H2O
4 NH3+6 NO --> 5 N2 + 6 H2O
a)
NH3
b)
NO
c)
N2
d)
water
11.
Fe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?
If 7.62g Fe react with 8.67g S, what is the limiting reactant?
a)
Fe
b)
S
c)
FeS
d)
none
12.
SO2 + PCl5 --> SOCl2 + POCl3
How much SOCl2 is produced when 16.2g SO2 react with 13.7g PCl5?
[Given Molar mass: SO2 = 64.1 g mol-1 , PCl5 = 208.5 g mol-1, SOCl2 = 119.1 g mol-1]
a)
7.83g
b)
30.1g
c)
26.4g
d)
19.8g
100 %
