Which one of the following pairs of 0.100 mol L -1 solutions, when mixed, will produce a buffer solution?
• A. 50. mL of aqueous CH3COOH and 25. mL of aqueous HCI
• B. 50. mL of aqueous CH3COOH and 100. mL of aqueous NaOH
• C. 50. mL of aqueous NaOH and 25. mL of aqueous HCI
• D. 50. mL of aqueous CH3COONa and 25. mL of aqueous NaOH
© E. 50. mL of aqueous CH3COOH and 25. mL of aqueous CH3COONa