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Calculate the pH of a solution that is 0.322 M in nitrous acid (HNO2) and 0.178...

Calculate the pH of a solution that is 0.322 M in nitrous acid (HNO2) and 0.178 M in potassium nitrite (KNO2). The acid dissociation constant of nitrous acid is 4.50 × 10-4.

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