The value of Ksp for Mg31AsO422 is 2.1 * 10-20 . The AsO4
Chapter , Problem 17.107(choose chapter or problem)
The value of Ksp for Mg31AsO422 is 2.1 * 10-20 . The AsO4 3 - ion is derived from the weak acid H3AsO4 1pKa1 = 2.22; pKa2 = 6.98; pKa3 = 11.502. When asked to calculate the molar solubility of Mg31AsO422 in water, a student used the Ksp expression and assumed that 3Mg2 + 4 = 1.53AsO4 3 - 4. Why was this a mistake?
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