11. Metal ions in aqueous solutions are solvated, or hydrated by water molecules

Question

11. Metal ions in aqueous solutions are solvated, or hydrated by water molecules. Typically this primary hydration sphere is composed of six water molecules. The hydrated metal ion acts as a weak acid, undergoing a stepwise hydrolysis in which it donates an H ion from its water ligands to the surrounding free water molecules. Shown below is the hydrolysis of Al(H2O)63 (pKa = 4.85) in water

Calculate the pH of a 0.00147 M AlCl3 solution and determine what fraction of the aluminum is in the form Al(H2O)5OH2 .

Explanation / Answer

11. Metal ions in aqueous solutions are solvated, or hydrated by water molecules

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