The thermodynamics equilibrium constant Kp for the homogeneous gaseous reaction is 10^-3. The standard Gibb's free energy change ∆G° for the reaction at 27°C. (Use R= 2 cal K ^−1 mol ^−1) is :

Calculate the pH of 1.0×10^−3 M sodium phenolate NaOC6​H5​ . Ka​ for C6​H5​OH is 1×10^−10 .