Electrochemical Cells

Question 1

Brief summary of what electrochemical cells do:

Answer 1

Electrochemical cells use chemical reactions to produce electricity.

Question 2

What does an electrochemical cell consist of?:

Answer 2

A cell can be made by connecting two different metal’s electrodes with a wire, and placing them in contact with an electrolyte.

Question 3

What is an electrolyte?

Answer 3

A liquid through which charged ions can flow.

Question 4

Why could you use a voltmeter with the cell?

Answer 4

To measure the voltage it produces

Question 5

Batteries consist of two or more…

Answer 5

cells connected in series to provide a greater voltage.

Question 6

Factors that affect the voltage of a cell:

Answer 6

1. the metals used for the electrodes the greater the difference in reactivity of the two metals, the greater the voltage will be.
2. the type and concentration of the electrolyte used.
3. Temperature/ other conditions

Question 7

Why are rechargeable batteries, rechargeable?

Answer 7

Because the chemical reactions are reversed when an external current is supplied i.e. the electric energy store is converted to chemical energy.

Question 8

In non-rechargeable batteries the reaction will stop when…

Answer 8

one of the reactants has been used up.