ES 3

Question 1

What type of reaction occurs at the cathode? Is it the negative or positive terminal?

Answer 1

Reduction negative

Question 2

What type of reaction occurs at the anode? Is it positive or negative terminal?

Answer 2

Oxidation positive

Question 3

What does electrolysis mean?

Answer 3

Breaking apart using electricity

Question 4

In an aqueous solution, what are the rules for when Hydrogen is made in an electrolysis reaction at the cathode?

Answer 4

If the metal is a G1, G2 or aluminium, the hydrogen from the water would be reduced at the cathode instead of the meta in the compound

Question 5

Why don’t sulfate ions go to either of the electrodes?

Answer 5

It can’t be oxidised anymore than a sulfate (VI) ion

Question 6

What is the equation for the reduction of water at the cathode?

Answer 6

2H2O + 2e –> 2OH- + H2

Question 7

What is the equation for the oxidation of water at the anode?

Answer 7

2H2O –> 4H+ + 4e + O2