Electrolysis and storage of batteries

excessive gassing will occur

temperature rise will occur

bulging and buckling of plates will occur

all above will occur

Capacity of cell will reduce

Sulphation of plates will occur

Internal resistance will increase

All above will occur

Lead-acid

Mercury oxide

Carbon-zinc

Silver-oxide

passive

active

redundant

inert

capacity of the cell is reduced

life of the cell is reduced

open plates are converted to lead sulphate

all above

There is a rise in voltage

Energy is absorbed by the cell

Specific gravity of H2SO4 is increased

The anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb) E. All of the above

PbO2

PbSC4

PbO

Pb

Temperature of surroundings

Specific gravity of electrolyte

Rate of discharge

All of the above

1 V

1.5 V

1.75 V

2 V

active

passive

inert

dielectric