问题
选择题
有甲、乙两种溶液，甲溶液的pH是乙溶液的pH的2倍，则甲溶液中c(H+)与乙溶液中c(H+)的关系是（ ）
A．2∶1
B．100∶1
C．1∶100
D．无法确定
答案
答案：D
已知pH(甲）=2pH(乙），则pH(甲）和pH(乙）有无数组解，所以无法确定c(H+)的数值关系。
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有甲、乙两种溶液，甲溶液的pH是乙溶液的pH的2倍，则甲溶液中c(H+)与乙溶液中c(H+)的关系是（ ）
A．2∶1
B．100∶1
C．1∶100
D．无法确定
答案：D
已知pH(甲）=2pH(乙），则pH(甲）和pH(乙）有无数组解，所以无法确定c(H+)的数值关系。
| 补全对话。 | |
B: Yes. It's about my sister, Melisa. She went to school this morning, and she hasn't arrived yet. and it's eleven o'clock and…… A: Just a moment, Miss……? B: Miss Green, 36 Nanjing Road. A: How old is Melisa? B: 1_______ A: And what does she look like? B: 2_______ A: And what's she wearing? B: 3_______ A: We'll try our best to find her. We'll telephone you at soon as possible. B: 4_______ A: 5_______ |