C2.5 Salts and Electrolysis

Question 1

An alkali has a pH of:

Answer 1

Above 7

Question 2

A solution that is neutral has a pH of:

Answer 2

7

Question 3

An acid has a pH of:

Answer 3

Below 7

Question 4

Define electrolysis

Answer 4

The breaking down of a substance using electricity

Question 5

Define electrode

Answer 5

A rod that conducts electricity

Question 6

Which electrode is positively charged?

Answer 6

Anode

Question 7

Which electrode is negatively charged?

Answer 7

Cathode

Question 8

At the cathode, ions 1) …… electrons to become an atom. This is called 2)…….

Answer 8

1) Gain

2) Reduction

Question 9

What is Brine?

Answer 9

Salt water

Question 10

Explain how electroplating works

Answer 10

1) The cathode is the object that you electroplate
2) The anode is the metal that you coat the object with
3) The electrolyte is the solution of the coating metal e.g. metal nitrate or sulfate

Question 11

What are the products of an acid and a base?

Answer 11

Salt + water

Question 12

All acids contain 1)……. ions.

All bases contain 2)……. ions.

Answer 12

1) H+

2) OH-

Question 13

Define a base

Answer 13

Any oxide or hydroxide of a metal

Question 14

Acids in solution contain …….. ions

Answer 14

Hydrogen

Question 15

Alkalis in solution contain …….. ions

Answer 15

Hydroxide

Question 16

At the anode, ions 1) …… electrons to become an atom. This is called 2)…….

Answer 16

1) Lose

2) Oxidation