Question: A metal oxide surface binds hydroxides that can be protonated or deprotonated. The surface sites can be SOH2+,SOH, or SO. In terms of the acidity

A metal oxide surface binds hydroxides that can be protonated or

A metal oxide surface binds hydroxides that can be protonated or deprotonated. The surface sites can be SOH2+,SOH, or SO. In terms of the acidity constants pKa1 and pKa2, derive an expression for the value of the pzc, which is the pH at which the surface has zero charge. (Hint: Combine expressions for Ka1 and Ka2 with the condition that results in zero net charge.)

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