Write the K expressions for the four equations below.

a$)N{i}_{(aq)}^{+2}+C{O}_3^{-2}($aq$)=NiC{O}_{3(s)}$

b$)N{H}_{3(aq)}+H_2{O}_{(l)}=N{H}_4^{+1}{?}_{(aq)}+O{H}_{(aq)}^{-1}$

c$)N_{2(g)}+3_H{?}_{2(g)}=2_N{H}_{3(g)}$

d$)2_N{H}_{3(g)}=N_{2(g)}+3_H{?}_{2(g)}$

Calculate the $K$ value for each of the three manipulations in the lecture notes.

$K_b=?$

$K_a=?$

$K_{\text{s}\text{u}\text{m}}=?$