Which is the best colored indicator to use in the titration of

0.1MCH_(3)CO_(2)H(aq)

with

NaOH(aq)

? Why? of

CH_(3)CO_(2)H=1.8E-5,K_(b)

of

{

(

:CH_(3)CO_(2)-5.6E-10)

}\ \\\\table[[Indicator,

pK_(a)

Which is the best colored indicator to use in the titration of 0.1 M CH3COH(aq) with NaOH(aq)? Why? (Ka of CH3CO2H 1.8E-5, K of CH3CO2-5.6E-10) Indicator Bromcresol Green Bromthymol Blue Phenolphthalein pka 4.8 6.8 9.2 Phenolphthalein. The pKa of CH3CO2 and the pK of the indicator are similar. O Phenolphthalein. The pH at the equivalence point is near the pKa of the indicator. Bromthymol Blue. The pH at the equivalence point is 7.0. O Bromcresol Green. The equivalence point for a weak acid titration occurs at low pH. Bromcresol Green. The pKa of CH3CO2H and the pKa of the indicator are similar.