AP CHEMISTRY

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Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.080 M NaOH.


A) benzoic acid (C6H5COOH) Ka= 6.3*10^-5 for it

  • AP CHEMISTRY -

    Didn't I show you how to do the other two of the three you posted last night? I think so. Now I've worked all three for you. This one is worked exactly like part b of your three part post.
    If we call this HB (for benzoic acid), then
    ..........B^- + HOH ==> HB + OH^- initial.0.0444...........0....0
    change....-x.............x.....x
    equil..0.0444-x...........x....x

    Kb = Kw/Ka = (HB)(OH^-)/(B^-)
    Substitute from the ICE chart, solve for OH^- and convert to pH.

  • AP CHEMISTRY -

    thanx

  • AP CHEMISTRY -

    ph = 5.57

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