Buffer capacity is a measure of a buffer solution\'s resistance to changes in pH

Question

Buffer capacity is a measure of a buffer solution's resistance to changes in pH as strong acid or base is added. Suppose that you have 155 mL of a buffer that is 0.140 M in both acetic acid (CH3COOH) and its conjugate base (CH3COO–). Calculate the maximum volume of 0.290 M HCl that can be added to the buffer before its buffering capacity is lost.

Sapling Learning er capacity is a measure of a buffer solution's resistance to changes in pH as strong acid or base is added Suppose that you have 155 mL of a buffer that is 0.140 M in both acetic acid (CH3COOH) and its conjugate base (CH3COO Calculate the maximum volume of 0.290 M HCl that can be added to the buffer before its buffering capacity is lost. Number mL. Map

Explanation / Answer

maximum buffer capacity = millimoles of salt = millmoles of acid

millimoles of salt = 0.140 x 155 = 21.7

21.7 should be equal to HCl millimoles

21.7 = molarity x volume

21.7 = 0.290 x volume

volume = 74.8 mL

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