Which of the following has the highest buffer capacity? A)0.10 M H ₂PO ₄ ⁻/0.10 M HPO ₄ ²⁻ B)0.50 M H ₂PO ₄ ⁻/0.10 M HPO ₄ ²⁻ C)0.10 M H ₂PO ₄ ⁻/0.50 M HPO ₄ ²⁻ D)0.50 M H ₂PO ₄ ⁻/0.50 M HPO ₄ ²⁻ E)They all have the same buffer capacity.

Question

Quizplus · Accepted Answer

Buffer capacity is defined as the amount of acid or base that can be added to a buffer solution before the pH changes significantly. It is determined by the concentrations of the weak acid and its conjugate base in the solution. The higher the concentrations of the weak acid and its conjugate base, the higher the buffer capacity. In this case, option D has the highest concentrations of both the weak acid (0.50 M H2PO4-) and its conjugate base (0.50 M HPO42-), making it the option with the highest buffer capacity.

Which of the Following Has the Highest Buffer Capacity