A 010 M Solution of a Weak Monoprotic Acid Has a a PH

question 42

Multiple Choice

A 0.10 M solution of a weak monoprotic acid has a pH of 3.40 at 25°C.What is the acid-ionization constant,K_a,for this acid?

• A)1.6 × 10^-6
• B)4.0 × 10^-4
• C)3.4 × 10^-5
• D)1.2 × 10^-3
• E)1.8 × 10^-7

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