A titration of a monoprotic weak acid with a strong base reaches its equivalence…
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A titration of a monoprotic weak acid with a strong base reaches its equivalence point at pH ≈ 8.8. Which of the following indicators would provide the clearest color change at the equivalence point?
(a) Alizarin yellow (transition range ≈ 10.1–12.0)
(b) Phenolphthalein (transition range ≈ 8.3–10.0)
(c) Bromothymol blue (transition range ≈ 6.0–7.6)
(d) Phenol red (transition range ≈ 6.4–8.0)