A buffer solution is prepared by taking 0.400 moles of acetic acid (pK_a = 4.76)and 0.250 moles of sodium acetate in sufficient water to make 1.400 liters of solution. Calculate the pH of this solution.

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Quizplus · Accepted Answer

The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]). Here, [A-] = 0.250 moles/1.400 L and [HA] = 0.400 moles/1.400 L. Substituting these values and the given pKa into the equation gives pH = 4.76 + log(0.250/0.400) = 4.76 + log(0.625) = 4.76 - 0.204 = 4.56.

A Buffer Solution Is Prepared by Taking 0