单项选择题

某一氢氧化钠、碳酸钠混合液,用HCl溶液滴定,以酚酞为指示剂,耗去HCl V1(mL), 再以甲基橙为指示剂继续滴定,又耗去HCl V2(mL),则V1与V2的关系是 ( )
A、 V1 B、V1 =V2
C、 2V1 = V2
D、V1> V2

你可能感兴趣的试题

单项选择题

‎The nervous system, heart, and liver are derived from ( ), ( ), and ( ), respectively.

A．all are derived from mesoderm
B．mesoderm, ectoderm, and endoderm
C．ectoderm, mesoderm, and endoderm
D．endoderm, mesoderm, and ectoderm

单项选择题

“直线”命令的快捷键是（）。
A、L
B、O
C、P
D、K