A laboratory procedure calls for titrating of a monoprotic weak base solution ( )…
CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A laboratory procedure calls for titrating 35.0mL of a monoprotic weak base solution (0.080M) with 0.100M perchloric acid.
For this base, Kb=3.1×10−6.
A student proposes using phenolphthalein (color change range pH 8.2–10.0) as the indicator.
Parts:
(a) Calculate the pH at the equivalence point of this titration.
(b) Assess quantitatively whether phenolphthalein is an appropriate indicator for detecting the equivalence point. Justify your answer.
(c) Recommend a more suitable indicator, if necessary, and support your choice with numerical evidence.