A Buffer Solution Is Made Such That the Initial Concentrations

question 111

Multiple Choice

A buffer solution is made such that the initial concentrations of lactic acid (HC₃H₅O₃) and the lactate ion (C₃H₅O₃-) are both 0.600 M.What is the resulting pH if 10.0 mL of 1.00 M hydrochloric acid is added to 0.500 L of the buffer solution? (The K_a of HC₃H₅O₃ is 1.4 *10^-4.)

• A)3.82
• B)3.88
• C)2.92
• D)4.79
• E)3.85

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