CHEMICAL EQUILIBRIUM

CHEMICAL EQUILIBRIUM

University

18 Qs

quiz-placeholder

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CHEMICAL EQUILIBRIUM

CHEMICAL EQUILIBRIUM

Assessment

Quiz

Chemistry

University

Easy

Created by

Lianny Ayuso

Used 16+ times

FREE Resource

18 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

15 mins • 1 pt

Media Image

Calculate the equilibrium constant (Kc) for the given reaction and tell whether equilibrium lies to the left or the right.

PCl5 (g) ↔ PCl3 (g) + Cl2 (g)

Equilibrium concentrations are: [PCl5] = 0.25 M, [PCl3] = 9.7 × 10-4 M, and [Cl2] = 3.2 × 10-3 M.

1.02 lies to the left

0.000012 lies to the left

1.02 lies to the right

0.000012416 lies to the left

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the Kc expression for this reaction?
   2 NO(g)  +  O2(g) ⇌  2 NO2(g)
K= [NO2]2 / [NO][O2]
K=  [NO][O2] / [NO2]2
K= [NO][O2] [NO2]2
K= [NO2]2 / [NO]2 +  [O2]

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

When 0.40 mole of SO2 and 0.60 mole of O2 are placed in an evacuated 1.00–liter flask, the reaction represented below occurs.

2SO2 (g) + O2 (g) ↔ 2SO3 (g)

After the reactants and the product reach equilibrium and the initial temperature is restored, the flask is found to contain 0.30 mole of SO3. Based on these results, the equilibrium constant, Kc, for the reaction is

20

10

6.7

2.0

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

H2(g)+Cl2(g)⇌2HCl(g)

The forward reaction is exothermic. What will happen to the equilibrium if the temperature is increased?

equilibrium shifts right

equilibrium shifts left

You cannot predict the effect

no change

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the equilibrium expression for: Fe3O4(s) + 4H2(g) ⇌ 3Fe(s) + 4H2O(g) Kc =

[Fe][H2O]4  / [Fe3O4] [H2]4
[Fe3O4] [H2]/  [Fe][H2O]4
[H2O]4 / [H2]4
[Fe] [H2O] / [Fe3O4] [H2]

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What are the two factors to look for when determining if the reaction is at equilibrium?
Forward reaction rate is faster than the reverse and concentrations are equal
Forward and reverse reaction rates are equal and concentration is conctant
Forward and revers reaction rates are equal and concentration is equal
Forward reaction rate is faster than the reverse and concentration is equal

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Media Image

Predict whether the reaction will shift to the right, left or not be affected by an INCREASE in temperature

2H2O2 (g) ↔ 2H2O (g) + O2 (g) exothermic

left

right

no effect

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