$2-3.$ Assuming standard states for all reactants and products, determine the spontaneous direction of the following reactions by calculating the cell potential:

a$.Cu+2HCl=CuC{l}_2+H_2$

b$.Fe+2HCl=FeC{l}_2+H_2$

c$.2AgN{O}_3+Fe=Fe(N{O}_3{)}_2+2Ag$

d$.Ag+FeC{l}_3=FeC{l}_2+$AgCl

e$.2Al+3ZnS{O}_4=A{l}_2(S{O}_4{)}_3+3Zn$

$2-4.$ Repeat Problem $2-3$ using the method of inspection described in Section $2\mathrm{.}1\mathrm{.}5.$