Cells and batteries

What is a chemical cell?

A device that produces electricity from a chemical reaction.

What is a battery?

Two or more chemical cells connected in series.

How does a chemical cell work?

By transferring electrons in a redox reaction.

What type of reaction occurs in a cell?

Redox reactions.

What is the role of an electrolyte in a cell?

It allows ions to move and conduct electricity.

Why does a cell stop producing electricity?

The reactants are used up.

What determines the voltage of a cell?

The difference in reactivity of the electrodes.

Why do non-rechargeable batteries eventually stop working?

The chemical reactions are irreversible.

Name a common rechargeable battery.

Lithium-ion battery.

What is the advantage of rechargeable batteries?

They can be reused multiple times.

What is the disadvantage of non-rechargeable batteries?

They contribute to waste and environmental pollution.

Write a redox reaction that occurs in a cell.

Zn+Cu2+→Zn2++Cu

Why are alkaline batteries better than traditional ones?

They last longer and provide more energy.

What is the role of the electrodes in a cell?

To conduct electricity and participate in redox reactions.

How does connecting cells in series affect the voltage?

The voltages add up.