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Ka for hypochlorous acid,HCLO, IS 3.0*10^-8. Calculate the pH after 10.0,20.0,30.0, and 40.0mL OF 0.100M NaOH have been added to 40.0mL of 0.100M HCLO..

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    The pH of HClO at the beginning of the titration is calculated from HClO as a single weak acid.

    Additions of NaOH form NaClO, which is a weak acid and its salt, therefore, the Henderson-Hasselbalch equation is used.

    At the equivalence point, the acid is completely neutralized and the pH is determined by the hydrolysis of the salt.

    After the equivalence point, the pH is determined by the excess amount of NaOH added.

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