下列缓冲对中,缓冲能力最强的是

  • A: [HPO42-]/[H2PO4-]为2mol/L/0.5mol/L
  • B: [HPO42-]/[H2PO4-]为1.6mol/L/0.4mol/L
  • C: [HPO42-]/[H2PO4-]为1.2mol/L/0.3mol/L
  • D: [HPO42-]/[H2PO4-]为1.0mol/L/0.25mol/L
  • E: [HPO42-]/[H2PO4-]为2.4mol/L/0.6mol/L

答案:

解析: