Problem: You are titrating a weak acid (pKa = 5.00) with a strong base. Which of the following indicators would likely be best for determining the “end point” as an estimate of the equivalence point? a) Methyl Violet – Transition Range: pH 0.0 – 1.6 b) Cresol Red – Transition Range pH 0.2 – 1.8 c) Cresol Purple – Transition Range pH 7.6 – 9.2 d) Methyl Orange – Transition Range pH 3.1 – 4.4 

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You are titrating a weak acid (pKa = 5.00) with a strong base. Which of the following indicators would likely be best for determining the “end point” as an estimate of the equivalence point?

a) Methyl Violet – Transition Range: pH 0.0 – 1.6

b) Cresol Red – Transition Range pH 0.2 – 1.8

c) Cresol Purple – Transition Range pH 7.6 – 9.2

d) Methyl Orange – Transition Range pH 3.1 – 4.4 

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