A solution at pH $7\mathrm{.}0$ contains $C{u}^{2+}$ and $N{H}_3.$

a$.$ What is the ratio $\frac{CuO{H}^{+}}{C{u}^{2+}}?$

b$.$ What is the ratio $\frac{N{H}_4^{+}}{N{H}_3}?$

c$.$ Are there any hydroxo complexes of $Cu$ present at concentrations greater

than that of $CuO{H}^{+}?$

d$.$ If $\{N{H}_4^{+}\}={10}^{-3\mathrm{.}0},$ which $Cu(N{H}_3{)}_x^{2+}$ complex willumbe present at the great$-$

est concentration?

e$.$ For a system with TOTCu$={10}^{-3}M$ and at $pH7\mathrm{.}0,$ what are $TOTN{H}_3$ and

$\{C{u}^{2+}\}$ when $Cu(N{H}_3{)}_4^{2+}$ first becomes the dominant $Cu$ species?