Question

What feature of a lead-storage battery best describes why the battery can be recharged?

Answer 1

A. The battery has two electrodes.
B. The voltages of several cells are combined.
C. The electrolyte is an aqueous solution.
D. The reaction at each electrode is reversible.

Answer 2

\(Seems\) to me when the battery is recharged, the sulfate is driven back into solution as sulfuric acid. Sulfuric acid is heavier than water. \(\color {blue}H\color {red}o\color {yellow}p\color {green}e~t\color {purple}h\color {green}a\color {pink}t~\color {green}h\color {red}e\color {blue}lp\color {orange}s!\)

Answer 3

@juanpabloJR what does that mean haha

Answer 4

Ok the option D is correct. Here is the explanation and the reaction.

In a secondary cell or a lead cell which is used in the car batteries and inverter batteries usually comprise mainly of lead anode and a grid of lead packed with lead oxide i.e. PbO_2 as cathode.

The cell reaction in inside the battery in the anode is
$$Pb(s)+SO_{4}^2-\rightarrow PbSO_4(s)+2e^-$$

the reaction in the cathode is
$$PbO_2+SO_4^2-+4H^++2e^-\rightarrow PbSO_4+2H_2O$$

the overall cell reaction is

$$Pb+PbO_2+2H_2SO_4\leftrightharpoons 2PbSO_4+2H_2O$$

On charging the battery the reaction is reversed and PbSO_4 on anode and cathode is converted into Pb and PbO_2 respectively.

This feature of the lead battery describes the rechargeable feature.

Answer 5

In each cell of the battery there are several layers of positive and negative plates. So from what I said before the conclusion would be re-exciting the positive plates from the negative plates. So he's right D is correct.

Answer 6

thanks so much guys!

Answer 7

This is to note that the reaction is maintained in a 38% solution of sulphuric acid which means sulphuric acid is the electrolyte used here.