Cells

Question 1

What do chemical reactions in a cell produce?

Answer 1

Electricity

Question 2

Why are the 2 electrodes usually metals?

Answer 2

Both must be able to conduct electricity

Question 3

Electrolyte

Answer 3

Liquid that contains ions which react with electrodes

Question 4

What do the chemical reactions between the electrodes and electrolyte set up?

Answer 4

Charge difference between electrodes

Question 5

If the electrodes are then connected by a wire, what happens?

Answer 5

Charge is able to flow and electricity is produced

Question 6

Factors that affect voltage of a cell

Answer 6

Type of electrodes used

Difference in reactivity of electrodes

Electrolyte used

Voltages of cells in battery

Question 7

In a rechargeable cell, how can the reaction be reversed?

Answer 7

By connecting to an external electric current

Question 8

Fuel cell

Answer 8

Electrical cell supplied with fuel and oxygen and uses energy from reaction between them to produce electrical energy efficiently

Question 9

What happens when fuel enters the cell?

Answer 9

Becomes oxidised and sets up a potential difference

Question 10

What do hydrogen-oxygen fuel cells involve?

Answer 10

Redox reaction