What is the pH of a solution that is 0.18 M K2HPO4 and 0.059 M K3PO4?...
What is the pH of a solution that is 0.18 M K2HPO4 and 0.059 M K3PO4? Use the Acid-Base Table. Please see Buffer pH for assistance. What is the pH of a solution that is 0.18 M K2HPO4 and 0.059 M K3PO4? Use the Acid-Base Table.
Homework Answers
mixture of K2HPO4 and K3PO4 act as acidic buffer
pH = pKa + log [K3PO4] / [K2HPO4]
pKa of K2HPO4 = 12.38
[K3PO4] = 0.059 M
[K2HPO4] = 0.18 M
pH = 12.38 + log [0.059] /[0.18]
pH = 12.38 - 0.48
pH = 11.90
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