Topics 3,4,5 - Acids, Metals & Fuels: Electrolysis

Question 1

Name a product you get when you electrolyse sea water. Give some uses of this product.

Answer 1

E.g. you get chlorine. This can be used in the manufacture of bleach and also to make the polymer PVC.

Question 2

How can you test for hydrogen?

Answer 2

Put a lighted splint into a test tube of gas. If hydrogen is present, it makes a squeaky pop.

Question 3

What products do you get when you electrolyse dilute hydrochloric acid?

Answer 3

Hydrogen gas and chlorine gas.

Question 4

How can you test for chlorine?

Answer 4

Chlorine bleaches damp litmus paper, turning it white.

Question 5

How can you text for oxygen?

Answer 5

Put a flowing splint into a test tube of gas. If oxygen is present, the splint will relight.

Question 6

What is electrolysis?

Answer 6

Electrolysis is the breaking down of a compound using electrical energy.

Question 7

What products do you get when you electrolyse water?

Answer 7

Hydrogen gas and oxygen gas.