Question

The equilibrium concentrations of the reactants and products are [HA]=0.130 M , [H+]=3.00×10−4 M , and [A−]=3.00×10−4 M . Calculate the value of p

Answer 1

$HA\to H^+ + A^-$

Equilibrium constant $=\frac{[A^-][H^+]}{[HA]}$ $\frac{3\times 10^{-4}\times 3\times 10^{-4}}{0.130}=6.923\times 10^{-7}\ M$