What Is The Effect Of PH On The Solubility Of Magnesium Chloride?

The solubility of magnesium chloride is affected by pH. At a low pH, magnesium chloride is more soluble due to the presence of excess H+ ions in solution. This causes the formation of Mg(H2O)62+complexes which are highly soluble. As the pH increases, the concentration of H+ ions decreases and the solubility of MgCl2 decreases. Near neutral pH, magnesium hydroxide may precipitate out of solution, further decreasing the solubility of MgCl2. Therefore, the solubility of magnesium chloride is highest at low pH and decreases as pH increases.