5.5.2.1 Cells and Batteries

Question 1

What do the chemicals in cells do?

Answer 1

• produce electricity

Question 2

What is the voltage produced by a cell dependent on?

Answer 2

• a number of factors
• e.g. type of electrode and electrolyte

Question 3

How can a simple cell be made?

Answer 3

• by connecting two different metals in contact with an electrolyte

Question 4

What do batteries consist of?

Answer 4

• two or more cells connected together in series to provide a greater voltage

Question 5

When do chemical reactions in non-rechargeable cells and batteries stop?

Answer 5

• when one of the reactants has been used up

Question 6

What is an example of a non-rechargeable battery?

Answer 6

• alkaline batteries

Question 7

Why can rechargeable cells and batteries be recharged?-

Answer 7

• chemical reactions are reversed when an external electrical current is supplied