The PH of a 0

question 37

Multiple Choice

The pH of a 0.22 M solution of a weak monoprotic acid, HA, is 2.74. Calculate K_a for this acid.

• A) 3.3  10^-6
• B) 1.5  10^-5
• C) 5.5  10^-10
• D) 2.2  10^-4
• E) 1.8  10^-3

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