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A solution is prepared at 25C that is initially 0.44M in nitrous acid HNO2, a weak acid with Ka=4.5x10^4, and 0.36M in sodium nitrite NaNO2.

A solution is prepared at 25C that is initially 0.44M in nitrous acid HNO2, a weak acid with Ka=4.5x10^4, and

0.36M in sodium nitrite NaNO2. Calculate the pH of the solution. Round your answer to 2 decimal places.

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