Chapter 19, Problem 19.85SP

The following reaction has an E^o value of 0.27 V:
${\text{Cu}}^{\text{2+}}(aq)+2Ag(s)+2B{r}^{-}(aq)\to Cu(s)+2AgBr(s)$
Use the data in Table 19.1 to calculate the standard reduction potential for the half-reaction $AgBr(s)+e^{-}\to Ag(s)+B{r}^{-}(aq)$