某校化学兴趣小组在实验中发现一瓶溶液，标签上标有“CaCl2 0.1 mol·L－1”的字样，下面是该小组成员对溶液的叙述，正确的是( )
| A．配制1 L该溶液，可将0.1 mol CaCl2溶于1 L水中 |
| B．Ca2＋和Cl－的物质的量浓度都是0.1 mol·L－1 |
| C．从试剂瓶中取该溶液的一半，则所取溶液的物质的量浓度为0.05 mol·L－1 |
| D．将该瓶溶液稀释一倍，则所得溶液的c(Cl－)为0.1 mol·L－1 |
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