Buffer solutions with the component concentrations shown below were prepared. Which of them should have the highest pH? A)[H ₂PO ₄ ⁻] = 0.50 M, [HPO ₄ ²⁻] = 0.50 M B)[H ₂PO ₄ ⁻] = 1.0 M, [HPO ₄ ²⁻] = 1.0 M C)[H₂PO₄⁻] = 1.0 M, [HPO₄²⁻] = 0.50 M D)[H₂PO₄⁻] = 0.50 M, [HPO₄²⁻] = 1.0 M E)[H ₂PO ₄ ⁻] = 0.75 M, [HPO ₄ ²⁻] = 1.0 M

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Quizplus · Accepted Answer

The highest pH in a buffer solution is achieved when the concentration of the base component is higher than the acid component. In option D, the concentration of the base ([HPO4^2-]) is higher than the acid ([H2PO4^-]), which would result in a higher pH compared to the other options.

Buffer Solutions with the Component Concentrations Shown Below Were Prepared