题目: 将C mol/L的AlCl3溶液V1 mL加水稀释至V2mL,稀释后溶液中Cl-物质的量浓度为( )A.V2V1Cmol/LB.V1V2Cmol/LC.3V2V1Cmol/LD.3V1V2Cmol/L 答案: 令稀释后溶液中Cl-的物质量浓度为y,则:V1 mL×3Cmol/L=V2mL×y解得y=3V1V2Cmol/L.故选:D.
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