8. A 0.15 M aqueous of the chloride salt of the complex ion Pt(NH3)4 is found to be weakly acidic with a pH of 4.92. This is initially puzzling because the Cl ion in water is not acidic and the NH3 in water is basic, not acidic. Finally, it is suggested that the Pt(NH3)4 ion as a group donates protons. Compute the K, of this acid, assuming that just one hydrogen is donated.
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