For CoCI 4 2- +6H 2 O →Co(H 2 O) 6 2+ + 4CI - . What happen when H 2 O ions are added?

K c will change and increase as H 2 O is added

Equilibrium shift to left to reduce the added H 2 O

For N 2 + 3H 2 →2NH 3 . When pressure is increased the equilibrium shift to right. Why?

To reduce the pressure, as right has less number of molecule

To increase the amount of products

K c will increase when it is shifted to the right

So it will increase the rate of reaction

CoCI 4 2- +6H 2 O →Co(H 2 O) 6 2+ + 4CI - (ΔH = -ve) What will happen when temperature is increased?

No change in position of equilibrium

Equlibrium will not be affected

For N 2 O 4 → NO 2 (ΔH = +ve). What will happen when temperature is increased?

No change in position of equilibrium

Equlibrium will not be affected

N 2 O 4 → NO 2 (ΔH = +ve). Why when temperature is increased position of equilibrium is shifted to RIGHT ?

Forward reaction is endothermic, thus reducing the temp

Forward reaction is exothermic, thus reducing the temp

Forward reaction is endothermic, thus increasing the temp

Forward reaction is exothermic, thus increasing the temp

The following statement is true for catalyst EXCEPT

Position of equilibrium shift to right, more product formed.

Increase the forward and reverse rate by the same extent

The following statement is true on the effect of increasing concentration EXCEPT

Increase concentration increases K c

Increase concentration increases the rate

Increase concentration has no effect on rate constant

Increase concentration changes the equilibrium composition.

The following statement is true on the effect of increasing pressure EXCEPT

Increase pressure has no effect on equilibrium composition.

Increase pressure increases the rate

Increase pressure has no effect on rate constant

Increase pressure has no effect on K c

The following statement is true on the effect of increasing catalyst EXCEPT

Increase catalyst has no effect on rate constant

Increase catalyst increases the rate

Increase catalyst has no effect on K c

Increase catalyst has no effect on equilibrium composition.

7.3 Le Chatelier Principle

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7.3 Le Chatelier Principle

Quiz

•

Chemistry

•

11th - 12th Grade

•

Practice Problem

•

Hard

•

NGSS

HS-PS1-6, HS-PS1-5, HS-PS1-4

Standards-aligned

Lawrence kok

Used 419+ times

FREE Resource

15 questions

Show all answers

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

The following factors affect the position of equilibrium EXCEPT

Concentration

Pressure

Temperature

States of matter

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Equilibrium for 2CrO₄^2- + 2H⁺ → Cr₂O₇^2- + H₂O. What happen when H⁺ ion are added to the system?

Position of equilibrium will shift to left

Color of system will turn from orange to yellow

K_c will be higher

Equilibrium will shift to right to decrease the added H⁺ ion

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Equilibrium for 2CrO₄^2- + 2H⁺→Cr₂O₇^2- + H₂O. What happen when OH^- ions are added to the system?

Position of equilibrium will shift to right

Color of system will turn from orange to yellow

K_c will decrease

OH^- ions will not react, and thus no change is seen.

Tags

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^-. What happen when CI^- ions are added?

Position of equilibrium will shift to right

Color of system will turn from blue to pink

Concentration of reactants and products remain unchanged

Equilibrium shift to left to reduce the added CI^- ions

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^-. What happen when H₂O ions are added?

Position of equilibrium will shift to left

Color of system will turn from blue to pink

K_c will change and increase as H₂O is added

Equilibrium shift to left to reduce the added H₂O

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For N₂O₄ (colorless) → 2NO₂(brown). What happens when pressure is increased?

Position of equilibrium will shift to right

Color of system will turn from colorless to brown

K_c will not change

Position of equilibrium will not change

Tags

NGSS.HS-PS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For N₂O₄ (colorless)→ 2NO₂(brown). By reducing pressure, equilibrium is shift to right. WHY?

Shift to the right will increase the rate of reaction

Color of system will turn from colorless to brown.

More particles on the right, so K_c will increase

More particles on the right, so pressure can increase again

Tags

NGSS.HS-PS1-6

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7.3 Le Chatelier Principle

15 questions

The following factors affect the position of equilibrium EXCEPT

Equilibrium for 2CrO₄^2- + 2H⁺ → Cr₂O₇^2- + H₂O. What happen when H⁺ ion are added to the system?

Equilibrium for 2CrO₄^2- + 2H⁺→Cr₂O₇^2- + H₂O. What happen when OH^- ions are added to the system?

For CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^-. What happen when CI^- ions are added?

For CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^-. What happen when H₂O ions are added?

For N₂O₄ (colorless) → 2NO₂(brown). What happens when pressure is increased?

For N₂O₄ (colorless)→ 2NO₂(brown). By reducing pressure, equilibrium is shift to right. WHY?

For N₂ + 3H₂ →2NH₃. When pressure is increased the equilibrium shift to right. Why?

CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^- (ΔH = -ve) What will happen when temperature is increased?

For N₂O₄ → NO₂ (ΔH = +ve). What will happen when temperature is increased?

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7.3 Le Chatelier Principle

15 questions

The following factors affect the position of equilibrium EXCEPT

Equilibrium for 2CrO42- + 2H+ → Cr2O72- + H2O. What happen when H+ ion are added to the system?

Equilibrium for 2CrO42- + 2H+→Cr2O72- + H2O. What happen when OH- ions are added to the system?

For CoCI42- +6H2O →Co(H2O)62+ + 4CI-. What happen when CI- ions are added?

For CoCI42- +6H2O →Co(H2O)62+ + 4CI-. What happen when H2O ions are added?

For N2O4 (colorless) → 2NO2 (brown). What happens when pressure is increased?

For N2O4 (colorless)→ 2NO2 (brown). By reducing pressure, equilibrium is shift to right. WHY?

For N2 + 3H2 →2NH3 . When pressure is increased the equilibrium shift to right. Why?

CoCI42- +6H2O →Co(H2O)62+ + 4CI- (ΔH = -ve) What will happen when temperature is increased?

For N2O4 → NO2 (ΔH = +ve). What will happen when temperature is increased?

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Equilibrium for 2CrO₄^2- + 2H⁺ → Cr₂O₇^2- + H₂O. What happen when H⁺ ion are added to the system?

Equilibrium for 2CrO₄^2- + 2H⁺→Cr₂O₇^2- + H₂O. What happen when OH^- ions are added to the system?

For CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^-. What happen when CI^- ions are added?

For CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^-. What happen when H₂O ions are added?

For N₂O₄ (colorless) → 2NO₂(brown). What happens when pressure is increased?

For N₂O₄ (colorless)→ 2NO₂(brown). By reducing pressure, equilibrium is shift to right. WHY?

For N₂ + 3H₂ →2NH₃. When pressure is increased the equilibrium shift to right. Why?

CoCI₄^2-+6H₂O →Co(H₂O)₆²⁺ + 4CI^- (ΔH = -ve) What will happen when temperature is increased?

For N₂O₄ → NO₂ (ΔH = +ve). What will happen when temperature is increased?