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sallydeeb sallydeeb
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9 years ago
3.   In the titration of oxalic acid (pK1 = 1.1, pK2 = 4.3) which of the following indicators could be used for the determination of the first end point, and what is the ratio of basic to acidic forms of the indicator that corresponds to the desired PH.
Methyl orange (pKa = 3.46)
Bromophenol blue (pKa = 4.10)
Chlorophenol red (Pka = 6.25)
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