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Question
Para-Aminobenzoic acid (PABA), p-H2NC6H4(COOH), is used in some sunscreens and hair conditioning products. Calculate the pH of an aqueous solution with [PABA] = 0.030 M andKa= 2.2 10-5.
A) 1.52
B) 3.09
C) 4.66
D) 6.18
Answer
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