Rechargeable batteries

Question 1

Secondary cells

Why are they considered rechargeable

Answer 1

Because the product remain in contact with the electrodes after reaction. This recharging occurs through electrolysis

Question 2

Secondary cell

What is it doing while discharging

Answer 2

Being used as a galvanic cell, using its stored chemical energy to produce electricity.

Question 3

Secondary cell

In redox reaction when recharging the reactants and products…..

Answer 3

swap

Question 4

Secondary cell

PbO2 electrode is ….
Pb electrode is….

Answer 4

+ (cathode)

- (anode)

Question 5

Secondary cell

This reaction occurs at the…
Pb(s) + HSO4 (aq) —> PbSO4(s) + H(aq) + 2e

PbO2(s) + HSO4(aq) + 3H(aq) + 2e —-> PbSO4(s) + 2H2O(l)

Answer 5

Anode

Cathode

Question 6

Secondary cell

Factors affecting battery life
-
-
-
-

Answer 6

• Increase temp reduces life
• Decrease temp decreases rate
• corrosion of plates due to acidic environments
• Products of discharge falls from electrodes