A 50.0 mL sample of 0.120 M monoprotic weak acid HA (K_a = ) is titrated with 0.120 M…
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A 50.0 mL sample of 0.120 M monoprotic weak acid HA (K_a = 1.0×10−6) is titrated with 0.120 M NaOH at 25 °C. Which of the following indicators is most appropriate for identifying the equivalence point?
(a) Bromothymol blue (6.0–7.6)
(b) Phenolphthalein (8.3–10.0)
(c) Alizarin yellow R (10.1–12.0)
(d) Methyl red (4.2–6.3)