1.

Select the best indicator from the given table for titration of 20 mL of \[0.02\,M\,\,C{{H}_{3}}COOH\]  with 0.02 M NaOH. Given \[p{{K}_{a}}\,(C{{H}_{3}}COOH)=4.74\] Indicator pH Range (I) Bromothy mol blue         6.0-7.6 (II) Thymolphthalein          9.3-11.05 (III) Malachite green           11.4-13 (IV) M-Cresol purple           7.4-9.0

A. I
B. II
C. III
D. IV
Answer» E.


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