Upon dissolution of a phase A into another one below it, a density stratification arises with a denser fluid above a less dense one if A increases the density of the solution. This gives rise to convective dynamics. The convective dissolution of A can be influenced by a chemical reaction because the reaction impacts the density profile. We theoretically focus on the reaction between species A and B initially present in the host phase producing C through the bimolecular A + B→C reaction. We numerically analyse the influence of the chemical reaction on the convective dynamics in the host phase and on the dissolving flux of A through the interface, depending on whether the reaction stabilizes or destabilizes the density profile. We show that the rate of advancement of the reaction front in the stabilizing case is controlled by both the diffusion of the reactants and by the convection of A above the reaction zone.With these results, we improve our understanding on the optimization of CO2 (A) sequestration into an aquifer containing a reactant (B).