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AP Chem Unit 06 Quiz POTENTIAL

Authored by Patrick Boylan

Chemistry

11th Grade

AP Chem Unit 06 Quiz POTENTIAL
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10 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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Write the general equilibrium constant for
2 NaBr(aq) + Pb(ClO4)2(aq) ⇄ PbBr2(s) + 2 NaClO4(aq)
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1
2
3
4

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is TRUE? 
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A large value of K means that the equilibrium concentrations of products are large compared to the equilibrium concentrations of the reactants.
When the value of K is small, the equilibrium lies on the product side of the equilibrium reaction.
When the value of K is large, the equilibrium lies on the reactant side of the equilibrium reaction.
A small value of K means that the equilibrium concentrations of the reactants are small compared to the equilibrium concentrations of the products.

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In which of the following cases will the LEAST time be required to arrive at equilibrium? K below refers to the equilibrium constant
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K is a very large number.
Cannot tell since the time to arrive at equilibrium does not depend on K.
K is about 1. 
K is a very small number. 

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Suppose the reaction
A + 3 B → 2 C
has a value of K = 10.0 at a certain temperature. If 0.5 moles of A, 0.5 moles of B and 0.5 moles of C are placed in a 5 L solution, the reaction:
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is at equilibrium.
shifts to the left. 
shift cannot be determined without the temperature. 
shifts to the right. 

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

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 1.1
0.60
1.7
0.36

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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The reaction for the synthesis of ammonia
N2(g) + 3 H2(g) → 2 NH3(g)
is exothermic. Increasing the temperature applied to the system
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 I and IV only
I and III only
II and IV only
II and III only

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Consider the reaction
Ni(s) + 4 CO(g) → Ni(CO)4(g)
At 30◦C and PCO = 1 atm, Ni reacts with CO(g) to form Ni(CO)4(g). At 200◦C, Ni(CO)4(g) decomposes to Ni(s) and CO(g). This means
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adding an inert gas like argon favors the forward reaction.
 a decrease in pressure favors the forward reaction.
K at 30◦C is greater than K at 200◦C
the forward reaction is endothermic.

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