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Solution: A buffer contains 55.3 mL of 0.200 M nitrous acid, HNO 2, wi...

Question

A buffer contains 55.3 mL of 0.200 M nitrous acid, HNO 2, with 100.0 mL of 0.550 M sodium nitrite, NaNO2. Find the pH after the addition of 180.0 mL of 0.400 M HClO  4. The Ka of HNO2 is 4.6 x 10-4