Several variables contribute to the pH of an aqueous solution, including the presence of acid or base, dissolved gasses, temperature, and impurities. When ceramic particles are added to an aqueous suspension, the pH will drift to the point of zero charge(pzc), or the isoelectric point(iep) in the presence of an indifferent electrolyte. The magnitude of this change is driven by the concentration of ceramic particles, and the rate of hydration reactions at the particle surface. In this study several variables were evaluated on the change in pH with time, including the surface area ratio to bulk fluid volume (area/liter), initial suspension pH, and the concentration of impurity ions, by measuring the pH using calibrated pH probes. The results demonstrate that if the suspension pH was shifted, the pH would return to the pzc over time, depending on the extent of the pH shift and the available reactive surface area.