Question

What type of battery is the lead storage battery? Write the anode and the cathode reactions and the overall reaction occurring in a lead storage battery when current is drawn from it.

Hint:

Faraday’s laws relate the quantity of deposited substance with time, current, and equivalent weight.

Answer 1

(a)(ii) Use Faraday’s second law: \[ \text{mass} = \frac{M \cdot I \cdot t}{nF} \Rightarrow t = \frac{m \cdot n \cdot F}{M \cdot I} \] Given: \[ m = 1.5\ \text{g},\ M = 108,\ I = 1.5\ \text{A},\ n = 1,\ F = 96500 \] \[ t = \frac{1.5 \cdot 1 \cdot 96500}{108 \cdot 1.5} = \frac{144750}{162} \approx 893.5\ \text{seconds} \] \[ \boxed{t \approx 894\ \text{seconds}} \]