Lesson 4: Cells and Batteries

Question 1

How can we make a cell?

Answer 1

• Two metals in an electrolyte produce a cell.

Question 2

How do the electrolyte and the metal produce electricity?

Answer 2

• Chemical reaction occurring on two surfaces of metals.
• Reactions producing electricity.

Question 3

What do batteries consist of?

Answer 3

Batteries consist of two or more cells connected together in series to provide a greater voltage.

Question 4

What 2 main factors does the voltage of a cell depend on?

Answer 4

1.) The type of electrodes
2.) The type of electrolyte.

Question 5

True or False

Cells can produce electricity for an unlimited period of time.

Answer 5

• False.
• Only for certain period. Eventually the chemicals in the cell run out and the reaction stops.

Question 6

How does the type of electrodes used affect the voltage of a cell?

Answer 6

• Greater difference in reactivity between metals produces a higher potential difference .

Question 7

Why do alkaline batteries run out at some point?

Answer 7

• In non-rechargeable cells and batteries the chemical reactions stop when one of the reactants has been used up.
• No more electricity is produced
• Reaction is irreversible.

Question 8

Why can rechargable cells and batteries be recharged?

Answer 8

• You can reverse chemical reactions when an external current is supplied.

Question 9

What do cells contain?

SPEC…

Answer 9

• Cells contain chemicals which react to produce electricity.