Consider a saturated solution of zinc arsenate, Zn3(AsO4)2 (Ksp = 1.0 × 10-27). If the pH of...
Consider a saturated solution of zinc arsenate, Zn3(AsO4)2 (Ksp = 1.0 × 10-27). If the pH of this solution is fixed at 6.00, what are the concentrations of the following species? Assume that these are the only species present in solution that contain Zn or As. Assume ionic strength is 0.
[Zn 2+] =
[ZnOH +] =
[AsO4 3-] =
[HAsO4 2-] =
[H2AsO4 -] =
[H3AsO4(aq)] =
Homework Answers
Ans.
from this equation we found that AsO4 can abstract 3 hydrogen
and release 3 OH- ions from water
charge of AsO4 will be 3- and Zn can abstract 2 OH
3 Zn(OH)2 + 2 H3AsO4 --> Zn3(AsO4)2 + 6 H2O
B) pH = - log (H+) = 6
[H+] = 106.
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