Which of the following indicators would be the best to use when 0.050 M benzoic acid (Ka = 6.6*10¯5) is titrated with 0.05 M NaOH?
A) bromphenol blue, pH range: 3.0 to 4.5
B) bromcresol green, pH range: 3.8 to 5.4
C) alizarin, pH range: 5.7 to 7.2
D) phenol red, pH range: 6.9 to 8.2
E) phenolphthalein, pH range: 8.0 to 10.1
Correct Answer:
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