# How do you write the balanced equation for this cell reaction? 2Cd(s) + 2Aq^(+)(aq) -> Cd^(2+)(aq) + 2Ag(s)

Dec 14, 2016

$C d \left(s\right) + 2 A {g}^{+} \rightarrow C {d}^{2 +} + 2 A g \left(s\right)$

#### Explanation:

Both mass and charge are balanced, and thus this is reasonable.

How to predict ${E}^{\circ}$ for this reaction?

$C {d}^{2 +} + 2 {e}^{-} \rightarrow C d$; ${E}^{\circ} = - 0.40 V$

$A {g}^{+} + {e}^{-} \rightarrow A g$; ${E}^{\circ} = + 0.80 V$

The given cell should have ${E}_{\text{cell}} = 1.20 \cdot V$. Do you agree?