When the chemical reaction A + B ↔ C+ D is at equilibrium,

neither the forward nor the reverse reactions have stopped.

both the forward and reverse reactions have stopped.

the sum of the concentrations of A and B equals the sum of the concentrations of C and D.

all four concentrations are equal.

Which of the following correctly describes the strengths of the acids in solution?

HA is an example of a strong acid, HB is an example of a weak acid.

HA and HB are both examples of strong acids.

HA and HB are both examples of weak acids.

HA is an example of a weak acid, HB is an example of a strong acid.

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

If the equilibrium constant is much less than one (K << 1) then

Equilibrium lies to the left (reactants are favored)

Equilibrium is not established.

Equilibrium lies to the right (products are favored)

Neither products or reactants are favored.

What is the equilibrium expression for: Fe 3 O 4 (s) + 4H 2 (g) <--> 3Fe(s) + 4H 2 O(g)

([Fe] 3 [H 2 O] 4 ) / ([Fe 3 O 4 ][H 2 ] 4 )

([Fe 3 O 4 ][H 2 ] 4 )/ ([Fe] 3 [H 2 O] 4 )

([Fe][H 2 O]) / ([Fe 3 O 4 ][H 2 ])

There are more products than reactants when the reaction reached equilibrium.

There are more reactant than products when the reaction reached equilibrium.

The amount of reactants is equal to the amount of products.

What is the main purpose of acid-base titrations?

To calculate the concentration of unknown analyte.

To calculate the concentration of known analyte.

What is the role of an indicator in a reaction?

To show when the reaction has reached or past the equivalence point.

To help reactants react successfully.

To bind to the analyte to form a products.

To provide a surface for the reaction to occur.

What is an equivalence point?

It is the point when the amount of added titrant is equal to the amount of analyte in the solution.

It is the point when enough analyte has been added.

It is the point when the volume of titrant is equivalent the volume of analyte.

It is the point when the concentration of titrant added is equivalent to the volume of analyte.

A student performs an acid-base titration and plots the experimental results in the graph above. Which of the following statements best explains the experimental findings?

A weak acid was titrated with a strong base, as evidenced by the equivalence point at pH > 7.

A strong acid was titrated with a strong base, as evidenced by the equivalence point at pH = 7.

A strong acid was titrated with a strong base, as evidenced by the equivalence point at pH > 7.

A weak acid was titrated with a weak base, as evidenced by the equivalence point at pH approximately 7.

What is a buffer solution?

A solution that is resistant to changes in pH

A solution that accepts changes in pH

Any solution containing an acid and a base

What is a buffer compromised of? (CHECK ALL THAT APPLY)

A weak acid and its conjugate base

A weak base and its conjugate acid

A strong base and its conjugate base

A strong acid and its conjugate acid

Acids, Bases, Equilibrium AP Chem

11th Grade

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Acids, Bases, Equilibrium AP Chem

Quiz

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Chemistry

•

11th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-PS1-5, HS-PS1-2, HS-PS1-1

Standards-aligned

Maria Duke

Used 14+ times

FREE Resource

56 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which molecule is acting as a base in the following reaction?
OH^– + NH₄⁺ → H₂O + NH₃

OH^–

NH₄⁺

H₂O

NH₃

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is not a strong base?

Ca(OH)₂

Fe(OH)₃

KOH

NaOH

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following compounds is a strong acid?
I. HClO₄ (aq)
II. H₂SO₄ (aq)
III. HNO₃ (aq)

I only

II only

II and III only

I, II, and III

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the pH of a solution that has an [H⁺] of 2.5 × 10^–5?

4.60

5.0

2.5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the pOH of a solution where the [OH^–] is 7.3 × 10^–2 M?

-1.14

2.0

1.14

7.3

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the pOH of a solution that has a pH of 2?

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the pOH of a solution where the [H⁺] is 2.5 × 10^–12 M?

11.6

2.40

2.5

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Acids, Bases, Equilibrium AP Chem

56 questions

Which molecule is acting as a base in the following reaction?
OH^– + NH₄⁺ → H₂O + NH₃

Which of the following is not a strong base?

Which of the following compounds is a strong acid?
I. HClO₄ (aq)
II. H₂SO₄ (aq)
III. HNO₃ (aq)

What is the pH of a solution that has an [H⁺] of 2.5 × 10^–5?

What is the pOH of a solution where the [OH^–] is 7.3 × 10^–2 M?

What is the pOH of a solution that has a pH of 2?

What is the pOH of a solution where the [H⁺] is 2.5 × 10^–12 M?

What is the conjugate acid in the following equation?

What is the conjugate base in the following reaction?

Which accepts protons?

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Acids, Bases, Equilibrium AP Chem

56 questions

Which molecule is acting as a base in the following reaction?OH– + NH4+ → H2O + NH3

Which of the following is not a strong base?

Which of the following compounds is a strong acid?I. HClO4 (aq)II. H2SO4 (aq)III. HNO3 (aq)

What is the pH of a solution that has an [H+] of 2.5 × 10–5?

What is the pOH of a solution where the [OH–] is 7.3 × 10–2 M?

What is the pOH of a solution that has a pH of 2?

What is the pOH of a solution where the [H+] is 2.5 × 10–12 M?

What is the conjugate acid in the following equation?

What is the conjugate base in the following reaction?

Which accepts protons?

Access all questions and much more by creating a free account

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Discover more resources for Chemistry

Which molecule is acting as a base in the following reaction?
OH^– + NH₄⁺ → H₂O + NH₃

Which of the following compounds is a strong acid?
I. HClO₄ (aq)
II. H₂SO₄ (aq)
III. HNO₃ (aq)

What is the pH of a solution that has an [H⁺] of 2.5 × 10^–5?

What is the pOH of a solution where the [OH^–] is 7.3 × 10^–2 M?

What is the pOH of a solution where the [H⁺] is 2.5 × 10^–12 M?