Electrochemical Cells

Question 1

Non rechargeable cells use what type of reaction

Answer 1

Irreversible

Question 2

Rechargeable cells use what type of reaction

Answer 2

Reversible

Question 3

Uses of non rechargeable cells are in

Answer 3

Torches and remote controls

Question 4

Uses of rechargeable cells include in

Answer 4

Laptop cars and phones

Question 5

An example of an non rechargeable cell is

Answer 5

Zinc/Carbon

Question 6

An eg of an reversible cell is

Answer 6

Lead/acid car battery

Question 7

Attempting to reverse a non rechargeable cell could cause

Answer 7

The battery to leak or explode

Question 8

Non rechargeable batteries are cheaper in the short term yet

Answer 8

More expensive in the long run

Question 9

Non rechargeable batteries last longer initially however are not

Answer 9

Reusable

Question 10

Non rechargeable batteries for vs rechargeables have

Answer 10

Less power

Question 11

Non rechargeables are generally more wasteful because…however they can be…

Answer 11

They can only be used once however they can be recycled

Question 12

Non rechargeable toxicity is…than rechargeables

Answer 12

Less

Question 13

Fuel cella generate electricity from

Answer 13

Hydrogen and oxygen

Question 14

The chemicals are stored…and…

Answer 14

Outside the cell and fed in in requirement

Question 15

The reaction when hydrogen is fed into the negative electrode is

Answer 15

2H2 —-> 4H+ + 4e-

Question 16

The reaction when O2 is then fed into the positive electrode is

Answer 16

O2 + 4H+ + 4e- —> 2H20

Question 17

The overall reaction in a fuel cell is

Answer 17

2H20 + O2 —> 2H2O

Question 18

Fuel cells do not req recharging as long as there is a constant supply of….

Answer 18

H2 and O2

Question 19

The only waste product of a fuel cell is H2O however H2 is flammable and req

Answer 19

Safe storage and transportation