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Electrolysis of Aqueous Electrolytes

Total questions: 15

Worksheet time: 30mins

Name
Class
Date
1.
a)

A

b)

B

c)

C

d)

D

2.
a)

A

b)

B

c)

C

d)

D

3.
a)

A

b)

B

c)

C

d)

D

4.
a)

A

b)

B

c)

C

d)

D

5.
a)

A

b)

B

c)

C

d)

D

6.

(e)(i)

a)

positive electrode: oxygen

negative electrode: hydrogen

b)

positive electrode: hydrogen

negative electrode: chlorine

c)

positive electrode: chlorine

negative electrode: hydrogen

d)

positive electrode:oxygen

negative electrode: sodium

7.

(e)(ii)

a)

2H+→H2+2e-

b)

2Cl-→Cl2+2e-

c)

2H++2e-→H2

d)

Na++e-→Na

8.

(f)

a)

water

b)

oxygen

c)

hydrogen

d)

chlorine

9.

(b)(i)

a)

oxygen

b)

chlorine

c)

sodium

d)

hydrogen

10.

(b)(ii)

a)

test: bubble into lime water

result: lime water turns cloudy

b)

test: damp blue litmus paper

result: bleaches to white

c)

test: lighted splint

result: 'pops'

d)

test: glowing splint

result: relights

11.

(b)(iii)

a)

Na++e-→Na

b)

2H+→H2+2e-

c)

2Cl-→Cl2+2e-

d)

2H++2e-→H2

12.

(a)

a)

cells

b)

electrolytes

c)

electrodes

d)

reactants

13.

(b)

a)

solution changes in color

b)

effervescence

c)

metal forming

d)

salt forms

14.

(c)(i)

a)

more hydrogen than oxygen

b)

more oxygen than hydrogen

c)

hydrogen is twice as much oxygen

d)

they are the same volume

15.

(c)(ii)

a)

sulfur

b)

dihydrogen dioxide

c)

water

d)

hydroxide