What is Mineral dissolution rate law?

The mineral dissolution rate law gives the rate of dissolution per unit of mineral surface, in $\mathrm{mol}\,\mathrm{m}^{-2}\,\mathrm{s}^{-1}$, as a sum over acid, neutral and basic mechanisms,

with rate constants $k_j$ at $25\,{}^{\circ}\mathrm{C}$, activation energies $E_j$, reaction orders $n_j$ (negative for the basic mechanism) and two exponents $p_j$, $q_j$, commonly taken as 1.