Unit 7 AP Chemistry Review Equilibrium

Unit 7 AP Chemistry Review Equilibrium

11th - 12th Grade

13 Qs

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Unit 7 AP Chemistry Review Equilibrium

Unit 7 AP Chemistry Review Equilibrium

Assessment

Quiz

Chemistry

11th - 12th Grade

Hard

NGSS
HS-PS1-6, HS-PS1-5, HS-PS1-7

+1

Standards-aligned

Created by

Charles Martinez

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13 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

CuO(s) + H2(g) ↔ Cu(s) + H2O(g)

ΔH = –2.0 kilojoules mol–1

When the substances in the equation above are at equilibrium at pressure P and temperature T, the equilibrium can be shifted to favor the products by

increasing the pressure by means of a moving piston at constant T

increasing the pressure by adding an inert gas such as nitrogen

decreasing the temperature

adding a catalyst

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

For the reaction A(g) ↔ B(g) + C(g), the equilibrium constant, Kp, is 2 x 10–4 at 25 °C. A mixture of the three gases at 25 °C is placed in a reaction flask and the initial pressures are PA = 2 atmosphere, PB = 0.5 atmosphere, and PC = 1 atmosphere. At the instant of mixing, which of the following is true for the reaction as written?

ΔG < 0

ΔG > 0

ΔG° = 0

ΔG° < 0

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-6

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many moles of NaF must be dissolved in 1.00 liter of a saturated solution of PbF2 at 25 °C to reduce the [Pb2+] to 1 x 10–6 molar? (Ksp of PbF2 at 25 °C = 4.0 x 10–8)

0.020 mole

0.040 mole

0.20 mole

0.40 mole

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In which of the following systems would the number of moles of the substances present at equilibrium NOT be shifted by a change in the volume of the system at constant temperature?

CO(g) + NO(g) ↔ CO2(g) + ½ N2(g)

N2(g) + 3 H2(g) ↔ 2 NH3(g)

N2(g) + 2 O2(g) ↔ 2 NO2(g)

NO(g) + O3(g) ↔ NO2(g) + O2(g)

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following must be true for a reaction that proceeds spontaneously from initial standard state conditions?

ΔG° > 0 and Keq > 1

ΔG° > 0 and Keq < 1

ΔG° < 0 and Keq > 1

ΔG° < 0 and Keq < 1

Tags

NGSS.HS-PS1-6

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The solubility of CuI is 2 × 10–6 molar. What is the solubility product constant, Ksp, for CuI?

1.4 × 10–3

2 × 10–6

4 × 10–12

2 × 10–12

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

H2C2O4 + 2 H2O ↔ 2 H3O+ + C2O4 2–


Oxalic acid, H2C2O4, is a diprotic acid with K1 = 5 x 10–2 and K2 = 5 x 10–5. Which of the following is equal to the equilibrium constant for the reaction represented above?

5 x 10–2

5 x 10–5

2.5 x 10–6

5 x 10–7

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