When aqueous KI is added gradually to mercury(II) nitrate, an orange precipitate forms. Continued addition of KI causes the precipitate to dissolve. Write balanced equations to explain these observations. (\(\mathrm{Hg}^{2+}\) reacts with \(\mathrm{I}^{-}\)to form \(\mathrm{HgI}_{4}{ }^{2-}\).) Would you expect \(\mathrm{HgI}_{4}{ }^{2-}\) to form colored solutions? Explain.