Calculate the \rm pH of a 0.10 M solution of hydrazine, \rm N_2H_4. K_b for hydrazine is 1.3\times 10^{-6}.

Answer 1

........N2H4 + HOH ==> N2H5^+ + OH^-
I.......0.1M...........0.........0
C........-x.............x........x
E......0.1-x............x........x

Substitute the E line into Kb expression and solve for x = OH^-, then convert to pH.