Why is equilibrium called a dynamic state?

The reactions at equilibrium continue to take place once equilibrium is established.

Chemists try to convert as much reactants as possible into products.

The products of a forward reaction are favored, so equilibrium lies to the right.

All chemical reactions are considered to be reversible under suitable conditions.

What is the K c expression for this reaction? 2 NO (g) + O 2(g) ⇌ 2 NO 2(g)

K c = [NO 2 ] 2 / [NO] 2 [O 2 ]

K c = [NO] 2 [O 2 ] / [NO 2 ] 2

K c = [NO 2 ] 2 / [NO] 2 + [O 2 ]

An equilibrium constant with a large value, e.g. K c = 1000, indicates…

Mostly reactants at equilibrium

Which is true for a system at equilibrium?

Forward and reverse reaction rates are equal and concentrations are constant

Forward reaction rate is faster than the reverse and concentrations are equal

Forward and reverse reaction rates are equal and concentrations are equal

Forward reaction rate is faster than the reverse and concentrations are constant

What is the correct equilibrium expression for the following reaction: 2H 2 O 2 (aq) ↔ 2H 2 O (l) + O 2 (g)

[H 2 O] 2 [O 2 ] / [H 2 O 2 ] 2

[H 2 O 2 ] 2 / [H 2 O] 2 [O 2 ]

Which of the following systems would NOT be shifted by a change in the volume of the system at constant temperature?

NO(g) + O 3 (g) ↔ NO 2 (g) + O 2 (g)

CO (g) + NO (g) ↔ CO 2 (g) + ½N 2 (g)

N 2 (g) + 3H 2 (g) ↔ 2NH 3 (g)

N 2 (g) + 2O 2 (g) ↔ 2 NO 2 (g)

Introduction to Equilibria

Quiz

•

Chemistry

•

10th Grade - University

•

Practice Problem

•

Hard

•

NGSS

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

Standards-aligned

Charles Martinez

FREE Resource

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Equilibrium for 2CrO₄^2- + 2H⁺→Cr₂O₇^2- + H₂O. What happens 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-PS1-5

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Given the K_c for a forward reaction, how can you find K_c for the reverse reaction?

Divide K_c by 1

Divide 1 by K_c

Square K_c

Take the square root of K_c

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

This endothermic reaction is at equilibrium.
If its temperature is increased (at constant volume and pressure), which way will the equilibrium shift?

To products (right)

To reactants (left)

Tags

NGSS.HS-PS1-5

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Le Chatelier's Principle states that if a chemical system at equilibrium is stressed,

the system will adjust to increase the stress

the system will adjust to reduce the stress

the system will not adjust

Tags

NGSS.HS-PS1-6

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

This symbol indicates that a reaction is ____________

reversible

irreversible

Tags

NGSS.HS-PS1-6

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

Chemical Equilibrium

Chemical Balance

Stoichiometry

Chemical Reaction

Tags

NGSS.HS-PS1-6

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For the reaction...
SO₂ + O₂ <−> SO₃
If the concentration of SO₂is increased, the system will shift ___________.

left

right

left and right

neither left nor right

Tags

NGSS.HS-PS1-5

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Introduction to Equilibria

25 questions

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

Given the K_c for a forward reaction, how can you find K_c for the reverse reaction?

This endothermic reaction is at equilibrium.
If its temperature is increased (at constant volume and pressure), which way will the equilibrium shift?

Le Chatelier's Principle states that if a chemical system at equilibrium is stressed,

This symbol indicates that a reaction is ____________

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

For the reaction...
SO₂ + O₂ <−> SO₃
If the concentration of SO₂is increased, the system will shift ___________.

For the reaction...
heat + N₂ + O₂ ↔ 2NO
If heat is added to the chemical system, the system will shift _______.

2SO₂(g) + O₂(g) ⇌ 2SO₃(g)
Decreasing the volume of container will

2SO₂(g) + O₂(g) ⇌ 2SO₃(g)
Using a catalyst will...

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Introduction to Equilibria

25 questions

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

Given the Kc for a forward reaction, how can you find Kc for the reverse reaction?

This endothermic reaction is at equilibrium.If its temperature is increased (at constant volume and pressure), which way will the equilibrium shift?

Le Chatelier's Principle states that if a chemical system at equilibrium is stressed,

This symbol indicates that a reaction is ____________

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

For the reaction...SO2 + O2 <−> SO3If the concentration of SO2 is increased, the system will shift ___________.

For the reaction...heat + N2 + O2 ↔ 2NOIf heat is added to the chemical system, the system will shift _______.

2SO2 (g) + O2 (g) ⇌ 2SO3 (g)Decreasing the volume of container will

2SO2 (g) + O2 (g) ⇌ 2SO3 (g)Using a catalyst will...

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

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

Given the K_c for a forward reaction, how can you find K_c for the reverse reaction?

This endothermic reaction is at equilibrium.
If its temperature is increased (at constant volume and pressure), which way will the equilibrium shift?

For the reaction...
SO₂ + O₂ <−> SO₃
If the concentration of SO₂is increased, the system will shift ___________.

For the reaction...
heat + N₂ + O₂ ↔ 2NO
If heat is added to the chemical system, the system will shift _______.

2SO₂(g) + O₂(g) ⇌ 2SO₃(g)
Decreasing the volume of container will

2SO₂(g) + O₂(g) ⇌ 2SO₃(g)
Using a catalyst will...