Module 2: Acids and Redox

Question 1

What is another name for a hydrogen ion?

Answer 1

Proton

Question 2

What are acids classified as?

Answer 2

Proton donors

Question 3

Why are most acids only acidic once in solution?

Answer 3

Because the ions are free to move

Question 4

What is the formula for hydrochloric acid?

Answer 4

HCl

Question 5

What is the formula for sulphuric acid?

Answer 5

H₂SO₄

Question 6

What is the formula for nitric acid?

Answer 6

HNO₃

Question 7

What is the formula for phosphoric acid?

Answer 7

H₃PO₄

Question 8

What is the formula for ethanoic acid?

Answer 8

CH₃COOH

Question 9

What is the pH of a high hydrogen ion concentration?

Answer 9

Low pH

Question 10

What is the pH of a low hydrogen ion concentration?

Answer 10

High pH

Question 11

What is a strong acid?

Answer 11

A strong acid is an acid that has fully dissociated hydrogen ions

Question 12

What is a weak acid?

Answer 12

A weak acid is an acid that has only partially dissociated hydrogen ions

Question 13

What is the formula of the base sodium hydroxide?

Answer 13

NaOH

Question 14

What is the formula of the base potassium hydroxide?

Answer 14

KOH

Question 15

What is the formula of the base ammonia?

Answer 15

NH₃

Question 16

What is the definition for a base?

Answer 16

A proton acceptor

Question 17

What is the definition of a salt?

Answer 17

An acid where one or more of its hydrogen ions is replaced with a metal ion or an ammonium ion

Question 18

What is oxidation?

Answer 18

Loss of electrons (OILRIG)

Question 19

What is reduction?

Answer 19

Gain of electrons (OILRIG)

Question 20

What is the oxidation number?

Answer 20

A number to tell how many electrons have been lost or gained

Question 21

What is a disproportionation reaction?

Answer 21

A redox reaction in which an element is both oxidised and reduced

Question 22

What does the roman numerals refer to?

Answer 22

Oxidation state