Cells & batteries

Question 1

How is a cell made?

Answer 1

• Connecting two different electrodes (made from two different metals) and placing them in an electrolyte (a liquid through which charged ions can flow)

Question 2

What is a battery?

Answer 2

• 2 or more cells connected in series to provide a greataer voltage

Question 3

Factors that affect the voltage of a cell (3 factors)

Answer 3

• The greater the difference in reactivity of the two electrodes, the greater the voltage
• Type & concentration of electrode used
• Conditions, such as temperature

Question 4

Why are some cells rechargeable and some aren’t?

Answer 4

• Rechargeable cells:
• Chemical reactions are reversed when an external electrical current is supplied
• Non-rechargeable cells:
• Reactions stops when one of the reactants is used up

Question 5

What type of cell is an alkaline battery?

Answer 5

• Non-rechargeable