A 015 M Aqueous Solution of the Weak Acid HA at at 25.0

question 9

Multiple Choice

A 0.15 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 5.35. The value of K_a for HA is ________.

• A)3.0 × 10^-5
• B)1.8 × 10^-5
• C)7.1 × 10^-9
• D)1.3 × 10^-10
• E)3.3 × 10⁴

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