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Shifts in Equilibrium Answers

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Consider the following chemical reaction at equilibrium. H2SO4(aq) 2H+(aq) + SO42–(aq) The addition of which compound will cause a shift in equilibrium because of a common ion effect?

Question illustration
A
NaCl
B
KNO3
C
MgSO4
D
FeCl3
2
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Consider the chemical equilibrium of the reaction. NH4OH(aq) NH4+(aq) + OH(aq) What will happen to the chemical equilibrium if NH4Cl is added to this solution?

Question illustration
A
The chemical equilibrium will shift to the right.
B
The chemical equilibrium will not shift.
C
The chemical equilibrium will shift to the left.
D
The chemical equilibrium will be lost.
3

Consider the following chemical equation in equilibrium. H2SO4(aq) 2H+ + SO42– What will happen to the chemical equilibrium if HCl is added to the system?

Question illustration
A
The chemical equilibrium will shift to the right.
B
The chemical equilibrium will be lost permanently.
C
The chemical equilibrium will not be affected.
D
The chemical equilibrium will shift to the left.
4

According to Le Chatelier’s principle, what happens to the equilibrium constant (K) when the concentration of the reactants is doubled?

A
The value of the equilibrium constant (K) is doubled.
B
The value of the equilibrium constant (K) is halved.
C
The value of the equilibrium constant (K) remains the same.
D
The value of the equilibrium constant (K) changes unpredictably.
5

Consider the reaction in chemical equilibrium. COCl2(g) CO(g) + Cl2(g) Which is the correct equation for K?

Question illustration
A
Upper K = StartFraction left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Superscript 2 Over left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket EndFraction
Option A
B
Upper K = StartFraction left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket EndFraction
Option B
C
Upper K = StartFraction left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket EndFraction
Option C
D
Upper K = StartFraction left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Superscript 2 EndFraction
Option D
6

Consider the chemical equilibrium of the reaction. AgCl(s) Ag+(aq) + Cl–(aq) What will happen to the chemical equilibrium if AgNO3 is added?

Question illustration
A
There is no shift in the chemical equilibrium of the system.
B
The chemical equilibrium of the system shifts to the right.
C
The chemical equilibrium of the system shifts to the left.
D
The chemical equilibrium of the system is destroyed.
7

Consider the chemical reaction in equilibrium. aA(aq) + bB(aq) cC(aq) + dD(aq) According to Le Chatelier’s principle, which statement correctly completes the table below? Change Effect on equilibrium constant (K) Increase in concentration of products Value of K does not change Increase in temperature Value of K also changes Increase in pressure ?

Question illustration
A
value of K does not change
B
value of K increases
C
value of K decreases
D
value of K oscillates
8

Consider the reaction H2(g) + I2(g) HI(g) with an equilibrium constant of 46.3 and a reaction quotient of 525. Which direction will the system shift to?

Question illustration
A
The equilibrium will shift to the left to favor the reactants.
B
The equilibrium will shift to the right to favor the products.
C
The equilibrium will not shift in any direction.
D
The equilibrium will shift to the forward reaction.
9

Consider the reaction H2(g) + I2(g) 2HI(g). What is the reaction quotient, Q, for this system when [H2] = 0.100 M, [I2] = 0.200 M, and [HI] = 3.50 M?

Question illustration
A
87.5
B
175
C
350
D
613
10

According to Le Chatelier’s principle, which statement is true?

A
The equilibrium constant is unchanged by temperature changes.
B
The equilibrium constant changes with a change in temperature.
C
The equilibrium constant increases with the concentration of reactants.
D
The equilibrium constant decreases with the concentration of products.

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Shifts in Equilibrium Answers — Chemistry Credit…