Chemistry - Ionic Equilibrium Question with Solution | TestHub

The degree of dissociation of water at a certain temperature is $3.6\times 10^{-9}$ and the density of water is $1.0g/c{\mathrm{m}}^3$. The ionization constant $K=\frac{\left[{\mathrm{H}}^{+}\right]\left[{\mathrm{OH}}^{-}\right]}{\left[{\mathrm{H}}_2\mathrm{O}\right]}$ of water at this temperature is: