## Homework 14.15 (a)

Josephine_Tang_1N
Posts: 30
Joined: Wed Sep 21, 2016 2:57 pm

### Homework 14.15 (a)

Instructions:
"Write the half-reaction and devise a galvanic cell (write a cell diagram) to study each of the following reactions:
(a) $AgBr_{(s)} \rightleftharpoons Ag^+_{(aq)} + Br^-_{(aq)}$, a solubility equilibrium"

I don't understand where to draw the two half-reactions from since there's only one reactant.

Annie Duong 3L
Posts: 13
Joined: Fri Jul 15, 2016 3:00 am

### Re: Homework 14.15 (a)

If you look in the back of the book at Appendix 2B, you can find the half reactions (remember that these are reduction half reactions, though).

$Ag^+ + e^- \rightarrow Ag$

$AgBr + e^-\rightarrow Ag + Br^-$

You are unable to use $Br_{2} + 2e^- \rightarrow 2Br^-$ because there is no $Br_{2}$ in the equation.

I hope that kind of helps?