Chemistry 12 Worksheet 2-2 - Lechatelier'S Principle - Chemical Equilibrium Worksheet Page 2
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7Chemistry 12
Unit 2 - Chemical Equilibrium
Hydrogen peroxide is decomposed as follows:
6.
∆ ∆ H = +187 kJ
H
O
H
+ O
2
2(l)
2(g)
2(g)
Predict the direction of equilibrium shift by each of the following imposed changes:
a) Increase the [H
] ........................................ Answer _________________________
2
b) Decrease the [O
] ....................................... Answer _________________________
2
c) Decrease the total pressure ........................
Answer _________________________
d) Increase the temperature............................
Answer _________________________
as a catalyst..............................
e) Add MnO
Answer _________________________
2
7.
Consider the following reaction at equilibrium:
H
+ I
2HI
2(g)
2(g)
(g)
a) Addition of more H
gas to the container will do what to the rate of the forward
2
reaction?
Answer ________________________
b) If, for a while, the rate of the forward reaction is greater than the rate of the reverse
reaction, what will happen to the [HI]?
Answer ________________________
c) As the [HI] is increased, what will happen to the rate of the reverse reaction?
Answer ________________________
d) When the rate of the reverse reaction once again becomes equal to the rate of the
forward reaction, a new_________________________________ has been reached.
e) Since the rate of the forward reaction was, for a while, greater than the rate of the
reverse reaction, the new equilibrium will have a slightly higher concentration of
___________ and a slightly lower concentration of __________________ &
________________
Worksheet 2-2 - LeChatelier's Principle
Page 2
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