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1 December, 09:46

The intrinsic solubility of sulfathiazole, an old antimicrobial, is 0.002 mol/l. it is a weak acid and its pka is 7.12. what is the ph of the saturated solution of sulfathiazole in pure water?

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  1. 1 December, 10:05
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    The formula we will use is:

    pH = 0.5 (pKa - log C)

    where C is the concentration of sulfathiazole in molarity or mol / L

    Since all values are given, we can compute directly for pH:

    pH = 0.5 (7.12 - log 0.002)

    pH = 4.91
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