Problem $8$

$(1)$ Estimate the equilibrium $pH$ of a solution containing $0\mathrm{.}01M$ ammonium chloride by using the given diagram. Give your detailed reason, including original equations and any assumption you might make. $(4$ Points$)$

$(2)$ Estimate the solution $pH$ of adding potassium acetate to water to give a concentration of $0\mathrm{.}02M$ using the given diagram. Give your detailed reason, including original equations and any assumption you might make. $(4$ Points$)$