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Worksheetsequilibrum constant
Total questions: 10
Worksheet time: 8mins
Name
Class
Date
1.
This symbol indicates that a reaction is ____________
a)
reversible
b)
irreversible
2.
When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in
a)
Chemical Equilibrium
b)
Chemical Balance
c)
Stoichiometry
d)
Chemical Reaction
3.
2A + 3B <----> 2AB
The forward reaction points towards the __________.
The forward reaction points towards the __________.
a)
left
b)
right
c)
up
d)
down
4.
Which is the reactant - and why?
a)
A, as concentration decreases
b)
B, as concentration decreases
c)
A, as concentration increases
d)
B, as concentration increases
5.
At what time the reaction reached equilibrium?
a)
t1
b)
t2
c)
t3
d)
t4
6.
What is the Kc expression for this reaction?
2 NO(g) + O2(g) ⇌ 2 NO2(g)
2 NO(g) + O2(g) ⇌ 2 NO2(g)
a)
Kc = [NO2]2 / [NO]2 [O2]
b)
Kc = [NO]2 [O2] / [NO2]2
c)
Kc = [NO]2 [O2] [NO2]2
d)
Kc = [NO2]2 / [NO]2 + [O2]
7.
What are [A] and [B]?
a)
concentration of reactants
b)
concentration of products
c)
energy of reactants
d)
energy of products
8.
What is the equilibrium expression for:
Fe3O4(s) + 4H2(g) <=> 3Fe(s) + 4H2O(g)
Kc =
Fe3O4(s) + 4H2(g) <=> 3Fe(s) + 4H2O(g)
Kc =
a)
[Fe]3 [H2O]4 / [Fe3O4] [H2]4
b)
[Fe3O4] [H2]4 / [Fe]3 [H2O]4
c)
[H2O]4 / [H2]4
d)
[Fe] [H2O] / [Fe3O4] [H2]
9.
N2O4(g) ↔ 2 NO2(g)
What is the concentration equilibrium constant expression?
What is the concentration equilibrium constant expression?
a)
Kc = [NO2]2/[N2O4]
b)
Kc = [N2O4]/[NO2]2
c)
Kc = [N2O4]2/[NO2]
d)
Kc = [NO2]/[N2O4]2
10.
Equilibrium constant for the reaction below can be expressed as
a)
Kc = [A][B]/[C][D]
b)
Kc = [C][D]/[A][B]
c)
Kc = [AB]/[CD]
d)
Kc = [CD]/[AB]
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