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7.9: Introduction to Le Chatelier's Principle

7.9: Introduction to Le Chatelier's Principle

Assessment

Presentation

Chemistry

9th - 12th Grade

Medium

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

Standards-aligned

Created by

Katherine Fehrenbach

Used 20+ times

FREE Resource

12 Slides • 6 Questions

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12

Multiple Choice

Question image
The following factors affect the position of equilibrium EXCEPT
1
Concentration
2
Pressure
3
Temperature
4
States of matter

13

Multiple Choice

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat


Adding SO2(g) will

1

shift equilibrium right

2

shift equilibrium left

3

increase rate of reaction

4

have no change

14

Multiple Choice

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat


Increasing the temperature will...

1

shift equilibrium right

2

shift equilibrium left

3

increase pressure

4

have no change

15

Multiple Choice

2SO2(g)+1O2(g) ⇌ 2SO3(g) + Heat


Increasing the pressure on the system will...

1

shift equilibrium right

2

shift equilibrium left

3

slow rate of reaction

4

have no change

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Possible Quiz Questions

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Multiple Choice

Question image

When colorless solutions of Fe3+ and SCN- are combined a deep red FeSCN2+ forms. Which of the following explains the observation that adding KSCN to the mix makes the red color deeper.

1

The added KCN dissolves, disturbing the charge balance of the solution, causing Fe(SCN)3 to precipitate as a red solid.

2

The added KSCN dissolves, causing the solution to become saturated in SCN- ions, which appear red in high concentrations.

3

The added KSCN dissolves, causing the reaction system to respond by producing more product to partially consume SCN- and reduce its concentration.

4

The added KSCN dissolves, causing the reaction system to respond by forming more Fe3+ ions, which have a deep orange color at high concentrations

18

Multiple Choice

Question image

Which predicts the effect that the addition of HNO3 (aq) will have on the equilibrium shown in reaction 1, and why?

1

The equilibrium of reaction 1 will shift toward the formation of more product, because N2O5 (g) is removed when it reacts to form HNO3 (aq)

2

The equilibrium of reaction 1 will shift toward the formation of more product, because H2O (l) acts as a catalyst for reaction 1.

3

The equilibrium of reaction 1 will shift toward the formation of more reactants, because the product N2O5 (g) is removed when it reacts to form HNO3 (aq)

4

The equilibrium of reaction 1 is not affected, because neither H2O (l) nor HNO3 (aq) are gases.

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