Chapter 19, Problem 1SEPP

A galvanic cell is constructed by immersing a piece of copper wire in 25.0 mL of a $\text{0}\text{.20 }M{\text{ CuSO}}_{\text{4}}$ solution and $\text{0}\text{.20 }M{\text{ ZnSO}}_{\text{4}}$ solution. ${\text{Cu}}^{\text{2+}}$ ions react with aqueous ${\text{NH}}_{\text{3}}$ to form the complex ion $\text{Cu}{\left(\text{NH3}\right)}_4^{2+}$ :

${\text{Cu}}^{\text{2+}}\text{(}aq{\text{)+4NH}}_{\text{3}}\text{(}aq\text{)}\underset{}{\to }\text{Cu}{\left({\text{NH}}_{\text{3}}\right)}_4^{2+}(aq)$

Using the equation:

$E\text{=}E°-\frac{0.0592\text{ V}}{n}\log Q$

calculate the emf of the cell at $\text{25°C}$.

a)

0.0 V

b)

1.10 V

c)

0.90 V

d)

1.30 V