A 40.0 mL sample of 0.100 M HNO2 is titrated with 0.200 M KOH. Calculate the pH at the equivalence point for the titration of HNO2 and KOH.

I got pH= 11.74.

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  1. I estimated the pH and didn't come close to 11 or 12 but I may not have used the same Ka value you did. Most tables in text books don't agree. Post your work and I'll look at it.

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  2. Actually, when I did the problem again, I got 8.08.

    Is this correct?

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  3. Yes, 8. something is right (I think I obtained 8.11 and I used 4E-4 for Ka for HNO2.

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