Homework Answers
It is assumed that X = 0.0026 M because the constant Kf is large, it has the expression:
Kf = [Zn (OH) 4-2] / [Zn + 2] * [OH -] ^ 4
2.8x10 ^ 15 = 0.0026 / [Zn + 2] * (0.1 - 4 * 0.0026) ^ 4
It clears [Zn + 2] = 1.1x10 ^ -17 M
Option B.
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