16. 下列哪二種水溶液混合後,何者不會形成緩衝溶液 (buffer solution)?
(A) 100 mL of 0.10 M Na2CO3
and 50 mL of 0.10 M HCl
(B) 100 mL of 0.10 M Na2CO3
and 75 mL of 0.20 M HCl
(C) 50 mL of 0.20 M Na2CO3
and 5.0 mL of 1.0 M HCl
(D) 100 mL of 0.10 M Na2CO3
and 50 mL of 0.10 M NaOH