Acids & Bases

Match

Match the following.

• Acid

• Base

• Frequently reacts with metal to form H₂

• Reacts with many oils & fats

Sour

Bitter

Acid

Base

• Sour

• Bitter

• Acid

• Base

Multiple Choice

What is the first name of the proponent of Arrhenius Theory?

• Svante

• Johannes Nicolaus

• Thomas Martin

• Arrhenius

Multiple Choice

How did Arrhenius define an acid?

• a substance that ionizes OH^– ion

• a substance that gives H⁺ ions

• a substance that is capable of transferring protons

• a substance capable of accepting protons

Multiple Choice

How did Bronsted & Lowry define a base?

• a substance that ionizes OH^– ion

• a substance that gives H⁺ ions

• a substance that is capable of transferring protons

• a substance capable of accepting protons

Multiple Choice

What happens when an acid reacts with a base?

• a proton (H⁺) will transfer from acid towards the base

• a proton (H⁺) will transfer from base towards the acid

• a proton (OH^-) will transfer from acid towards the base

• a proton (OH^-) will transfer from base towards the acid

Multiple Choice

What do you call the product that will be formed after an acid loses H⁺?

• Bronsted acid

• Bronsted base

• Conjugate base

• Conjugate acid

Multiple Choice

What do you call the product that will be formed after a base accepts H⁺?

• Bronsted acid

• Bronsted base

• Conjugate base

• Conjugate acid

Multiple Choice

True or False?

Water can act as both an acid and a base.

• True

• False

Multiple Choice

What is the name for substances that can act as both an acid and a base?

• alkalescent

• acidic

• alkaline

• amphoteric

Multiple Choice

How does water act as an acid?

• All of the choices are correct

• It reacts with another water molecule

• It accepts a proton

• It donates a proton

Multiple Choice

How does water undergo self-ionization or auto-ionization?

• All of the choices are correct

• It reacts with another water molecule to form H₃O⁺ & OH^-

• It accepts a proton

• It donates a proton

Multiple Choice

How does water act as a base?

• All of the choices are correct

• It reacts with another water molecule to form H₃O⁺ & OH^-

• It accepts a proton

• It donates a proton

Dropdown

SO₄^-2(aq) + H₂O(l) ⇌ HSO₄^-(aq) + OH^-(aq)

​

Select answer

​

Select answer

​

Select answer

​

Select answer

Dropdown

CH₃COOH(aq) + H₂O(l) ⇌ CH₃COO^-(aq) + H₃O⁺(aq)

​

Select answer

​

Select answer

​

Select answer

​

Select answer

Dropdown

NH₃(aq) + HF (aq) ⇌ NH₄⁺(aq) + F^-(aq)

​

Select answer

​

Select answer

​

Select answer

​

Select answer

Dropdown

OH^-(aq) + H₂SO₄(aq) ⇌ H₂O(l) + HSO₄^-(aq)

​

Select answer

​

Select answer

​

Select answer

​

Select answer

Multiple Choice

Experimentally, what is the value of ionization constant for water, K_w?

• 1.0x10^-14

• 1.0x10¹⁴

• 1.0x10^-7

• 1.0x10⁷

Multiple Choice

An aqueous solution with [H₃O⁺] < [OH^-] is

• Basic

• Acidic

• Neutral

• Equilibrium

Multiple Choice

An aqueous solution with [H₃O⁺] = [OH^-] is

• Basic

• Acidic

• Neutral

• Equilibrium

Multiple Choice

An aqueous solution with [H₃O⁺] > [OH^-] is

• Basic

• Acidic

• Neutral

• Equilibrium

Fill in the Blank

What does pH mean?

Multiple Choice

How do we get the value of pH?

• log[H⁺]

• -log[H⁺]

• antilog^-pH

• -log[OH^-]

Multiple Choice

The pH scale ranges from

• 1-10

• 0-14

• 1-14

• 1-15

Multiple Choice

The pH scale ranges from

• 1-10

• 0-14

• 1-14

• 1-15

Multiple Choice

If the pH value is 3.5, what kind of solution is it?

• acidic

• basic

• neutral

• mixture

Multiple Choice

If the pH value is 8.0, what kind of solution is it?

• acidic

• basic

• neutral

• mixture

Multiple Choice

If the pH value is 7, what kind of solution is it?

• acidic

• basic

• neutral

• mixture

Multiple Choice

Which of the following is the most acidic?

• Black coffee

• Tomato juice

• Lemon juice

• Gastric acid

Multiple Choice

Which of the following is a base?

• Black coffee

• Bleach

• Apple juice

• Pure water

Multiple Choice

Which of the following can be an acid and a base?

• Black coffee

• Bleach

• Apple juice

• water

Fill in the Blank

The concentration of OH^- in certain household cleaning solution is 0.0034 M. Calculate the concentration of H₃O⁺ or H⁺.

.

^

-

Fill in the Blank

A. What is the pH of a sample that has a H⁺

concentration of 2.6×10^–4 M?

B. Classify the solution as acidic, basic, or neutral.

.

.

.

Fill in the Blank

If an unknown solution has a pH level of 6.8 What is the value of H⁺?

.

^

-

Multiple Choice

Which of the following is a conjugate acid-base pair?

• F^- and HCO₃^-

• F^- and H₂CO₃^-

• HF and F^-

• HF and H₂CO₃^-

Multiple Choice

Water is can act either as an acid or a base. Which of the

following equation represents water reacting as an acid?

• H₂O(l) + HCl(aq) ⇌ H₃O⁺(aq) + Cl^-(aq)

• H₂O(l) + HNO₃(aq) ⇌ H₃O⁺(aq) + NO₃^-(aq)

• H₂O(l) + H₂CO₃(aq) ⇌ H₃O⁺(aq) + HCO₃^-(aq)

• H₂O(l) + CO₃^-2(aq) ⇌ OH^-(aq) + HCO₃^-(aq)

Multiple Choice

Substances that react with both acids and bases are called

• amphoteric

• conjugate acids

• conjugate base

• neutral

Multiple Choice

The product formed by loss of a proton from an acid is called

• Bronsted acid

• conjugate acid

• Bronsted base

• conjugate base

Multiple Choice

The product formed by gain of a proton from an acid is called

• Bronsted acid

• conjugate acid

• Bronsted base

• conjugate base

Multiple Choice

The pH of rainwater is 5.82. The [H⁺] is

• 6.61x10^-9

• 6.16 x10^-9

• 1.51x10^-6

• 1.15 x10^-6

Multiple Choice

The concentration of hydrochloric acid (HCl) solution, [H⁺], is

3.9x10^-4 M. What is the pH of the solution?

• 3.14

• 3.41

• 10.59

• 10.95

Multiple Choice

A solution with a pH of 9.0

• is acidic

• is moderate

• is basic

• is neutral

Multiple Choice

If a solution is neutral, which of the following must be true?

• [H₃O⁺] = [OH^-]

• [H₃O⁺] > [OH^-]

• [H₃O⁺] < [OH^-]

• [H₃O⁺] = [H₂O]

Multiple Choice

A solution with a pH of 5.0

• has a hydrogen-ion concentration of 5.0 M

• has a hydrogen-ion concentration of 1 x 10^-5 M

• is basic

• is neutral