Three phosphate buffers are listed below, each at 1.0 L total volume.
A. 0.30 mol H₂PO₄⁻ and 0.70 mol HPO₄²⁻
B. 0.50 mol H₂PO₄⁻ and 0.50 mol HPO₄²⁻
C. 0.40 mol HPO₄²⁻ and 0.60 mol PO₄³⁻
A process will introduce 0.050 mol of HCl into the solution.
Identify which buffer will best resist the resulting pH decrease. Write the net ionic equation that shows how that buffer neutralizes the added HCl.