The simple cation AI3+ actually exists in water as the complex cation [Al(H2O)6] which is of the form [M(H2O)m+. If the pH were adjusted to 5.5 in otherwise pr water, the most common soluble species of Al in the water should be the third hydrolysis product [M(OH)3(H2O)n-3m-3)+. the second hydrolysis product [M(OH)2(H2O)n-2m-2)+. the unhydrolyzed metal [M(H20),m+. O the first hydrolysis product [M(OH)(H2O)n-1m-1)+.
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