3
$\begingroup$

What is the reason there is no salt bridge for this cell?

$$\ce{Pt(s) | H2(g) | HBr(aq) | AgBr(s) | Ag(s)}$$

$\endgroup$

1 Answer 1

2
$\begingroup$

The function of a salt bridge or a diaphragm is to avoid mixing of 2 different electrolytes or electrolysis products from the respective half-cells, while allowing ion electro-migration between them.

This cell does not need a salt bridge as it uses the only electrolyte $\ce{HBr(aq)}$ and the is no need to separate the $\mathrm{AgBr}$ electrode from gaseous hydrogen.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.