Electrolysis

Question 1

What is electrolysis

Answer 1

Electrolysis is the splitting up of a compound into its elements using electricity.

Question 2

What is the substance being electrolysed known as

Answer 2

The electrolyte

Question 3

Oxidation is ______________ Reduction is ______________

Answer 3

Oxidation is loss
Reduction is gain

Question 4

Which element is attracted to the negative electrode

Answer 4

The less reactive one

Question 5

When is a metal formed at the negative electrode

Answer 5

When the the positive ion is less reactive than hydrogen

Question 6

Which group of elements are attracted to the positive electrode

Answer 6

Group 7

Question 7

If a group 7 ion is not present what is formed at the positive electrode

Answer 7

Oxygen (from the hydroxide ions)

Question 8

What substance is formed at the cathode when Sodium Chloride is the electrolyte

Answer 8

Hydrogen (because sodium is more reactive than hydrogen)

Question 9

What substance is formed at the anode when Sodium Chloride is the electrolyte

Answer 9

Chlorine (because it is in group 7)

Question 10

What substance is formed at the cathode when Copper Sulfate is the electrolyte

Answer 10

Copper (because it’s less reactive than hydrogen)

Question 11

Which 4 metals are less reactive than Hydrogen

Answer 11

Copper
Silver
Gold
Platinum