THE KINETICS OF DISSOLUTION OF SILICA MONOSPHER INTO WATER AT DIFFERENT CONCENTRATIONS OF BACKGROUND ELECTROLYTE

The kinetics of dissolution of silica 'Monospher' into water as regard s its dependence on time and pH was investigated at background electro lyte concentrations of 0, 0.001, 0.01 and 0.1 mol l(-1). The dissolved amount of silica depicted as a function of time and pH forms a dissol ution surface. This surface can be modeled by four deprotonation equil ibria and four elementary reactions. The concentration of background e lectrolyte increases the rate of dissolution and influences the shape of the dissolution surface.