Topic 5

Question 1

Electro-chemical cell

Answer 1

An electrochemical cell is a device capable of either generating electrical energy from chemical reactions or using electrical energy to cause chemical reactions

consists of electrodes and electrolytes

Question 2

Electrodes

Answer 2

Two different metals

• one is negative(gives up electrons)
• one is positive ( receives electrons)

the passing of electrons creates an electrical current

Question 3

wet cells vs dry cells

Answer 3

wet- liquid electrolyte

dry- paste, plastic or ceramic solid electrolyte

Question 4

electrolyte

Answer 4

a substance that conducts electricity

Question 5

Primary vs secondary cell

Answer 5

Primary-the amount of chemical it contains determines the energy the cell can produce
Secondary-the chemical reaction which produces the electricity can be reversed by
forcing electricity through the dead cell

-this restores the chemicals so that the cell can continue producing electricity