由FeCL3、KCL组成的1 L混合液中,已知Fe3+的质量为28 g,CL-的质量为71 g

FeCL3KCL组成的1 L混合液中,已知Fe3+的质量为28 gCL-的质量为71 g

原溶液中K+的质量为多少克?

若量取该混合液250 ml ,将其加水稀释至1 L,则稀释后所得溶液中CL-的物质的量浓度为多少?

答案

119.5g  (3)

20.5  mol・l-1   (5)

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