1.
Equivalent conductance of 0.1 M0.1\,\text{M} HA (weak acid) solution is 10 S cm2 equivalent−110\,\text{S cm}^2\,\text{equivalent}^{-1} and that at infinite dilution is 200 S cm2 equivalent−1200\,\text{S cm}^2\,\text{equivalent}^{-1}. Hence pH of HA solution is