Quiz | The Properties of Acids and Bases

1

A base is converted to its conjugate acid by …

removing a proton

removing an electron

adding a proton

adding an electron

A conjugate acid-base pair HA/A- differ only by the presence or absence of a proton
An acid donates a proton H+ to a base ⇒ a base is converted to its conjugate acid by adding a proton

2

How is a solution with a pH = 8?

Acidic

Neutral

Basic

Protic

pH > 7 ⇒ Basic solution

3

Which of the following statements is incorrect?

Kw = [H3O+][HO-]

Kw = 1.0 x 10-14 2  at 25°C

In an acidic solution, [H3O+] > [HO-]

In a neutral solution, [H3O+] = [HO-] = 1.0 x 10-14 M

In a neutral solution: [H3O+] = [HO-] = 1.0 x 10-7 M

4

What is the equation of the self-ionization of water?

2 H2 2 H2 + O2

2 H2O  H2O2 + H2

2 H2O  H3O+ + HO-

2 H2O  4 H+ + 2 O2-

5

What is [H3O+] of a solution with a pOH = 11?

1.0 x 10-11 M

1.0 x 10-3 M

1.0 x 103 M

1.0 x 1011 M

pH + pOH = 14 ⇒ a solution with a pOH = 11 has a pH = 3
[H3O+] = 10-pH ⇒ [H3O+] = 1.0 x 10-3 M

6

How is called a substance that can act as either an acid or a base?

Polyprotic acid

Amphoteric compound

Conjugate species

Ambidextrous compound

Amphoteric compound: compound that can act as both a Bronsted acid and base
Polyprotic acid: acid that donate more than one acidic proton