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5000 ML of 0

Question 78

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50.00 mL of 0.10 M HNO2 (nitrous acid, Ka = 4.5 × 10−4)is titrated with a 0.10 M KOH solution. What would be the pH of the solution after 25.00 mL of the KOH solution is added?Hint: After the partial neutralization, treat the solution as a buffer.

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