Chemistry / Acid Base Indicators
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Solution: Which of the following indicators would be most suitable for...

Question

Which of the following indicators would be most suitable for the titration of 0.10 M lactic acid solution with 0.10 M KOH(aq)? For lactic acid, pKa = 3.08

(a) methyl orange (pKIn = 3.4)

(b) thymol blue (pKIn = 1.7)

(c) alizarin yellow (pKIn = 11.2)

(d) bromophenol blue (pKIn = 3.9)

(e) phenol red (pKIn = 7.9)