14.15a

[Kyra LeRoy 1E]

For the half-equations
Ag+(aq) + e- -> Ag(s) (cathode)
and
Ag(s) + Br-(aq) -> AgBr(s) + e- (anode)
the cell diagram in the solutions says

Ag(s)|AgBr(s)|Br-(aq)||Ag+(aq)|Ag(s)

Why are the Ag(s) and AgBr(s) in the left half separated by a vertical line instead of a comma, even though they are in the same state?

Thanks!

[mayasinha1B]

You only use a comma if both are in the aqueous state and therefore in the same solution