$(20$pt$)$ Chlorine is used for oxidation of cyanide in a $36C$ electroplating

wastewater according to the following reaction:

$CN-+$HOCl$+H2$OharrCNO$-+Cl-+H3O+$

a$)$ Calculate $G$ in kca$\frac{l}{m}$ole if $pH=4,[CN-]=26m\frac{g}{1},[CNO-]=4\mathrm{.}2$

$m\frac{g}{1},[HOCl]=52\mathrm{.}4m\frac{g}{1}$ and $[Cl-]=3540m\frac{g}{1}.$

b$)$ The $pH$ is changed to $11.$ Does the alkaline environment make the

energetics for the oxidation of the cyanide more or less favorable?