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Which Is the Best Colored Indicator to Use in the Titration

question 64

Multiple Choice

Which is the best colored indicator to use in the titration of 0.1 M CH₃CO₂H(aq) with NaOH(aq) ? Why? (K_a of CH₃CO₂H = 1.8 $\times$ 10^-5,K_b of CH₃CO₂^- = 5.6 $\times$ 10^-10)
$Which is the best colored indicator to use in the titration of 0.1 M CH3CO2H(aq) with NaOH(aq) ? Why? (Ka of CH3CO2H = 1.8 \times 10-5,Kb of CH3CO2- = 5.6 \times 10-10) A) Bromcresol Green.The equivalence point for a weak acid titration occurs at low pH. B) Bromthymol Blue.The pH at the equivalence point is 7.0. C) Bromcresol Green.The pKa of CH3CO2H and the pKa of the indicator are similar. D) Phenolphthalein.The pKa of CH3CO2- and the pKb of the indicator are similar. E) Phenolphthalein.The pH at the equivalence point is near the pKa of the indicator.$

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