# Question #c78ac

Jun 5, 2017

There is no reaction.

#### Explanation:

I assume you mean:

$\textsf{2 A {u}_{\left(s\right)} + C {u}_{\left(a q\right)}^{2 +} \rightarrow C {u}_{\left(s\right)} + 2 A {u}_{\left(a q\right)}^{+}}$

Gold is a very unreactive metal so you would not expect it to displace copper from a solution of its salt.

This is born out by the $\textsf{{E}^{\circ}}$ values:

$\textsf{C {u}^{2 +} + 2 e r i g h t \le f t h a r p \infty n s C u \text{ } {E}^{\circ} = + 0.34 \textcolor{w h i t e}{x} V}$

$\textsf{A {u}^{+} + e r i g h t \le f t h a r p \infty n s A u \text{ } {E}^{\circ} = + 1.83 \textcolor{w h i t e}{x} V}$

These data indicate that the gold 1/2 cell will go left to right and the copper 1/2 cell will go right to left.

The spontaneous reaction will be:

$\textsf{C {u}_{\left(s\right)} + 2 A {u}_{\left(a q\right)}^{+} \rightarrow C {u}_{\left(a q\right)}^{2 +} + 2 A {u}_{\left(s\right)}}$