溶质的质量分数:
①7.5/107.5×100%≈7.0%
②0.17/100.17×100%≈0.2%
③50×8%/100×100%=4%
④6.4/106.4×100%≈6.0%
所以四种溶液中溶质的质量分数由大到小的顺序排列正确的是①④③②,即C.
溶质的质量分数:
①7.5/107.5×100%≈7.0%
②0.17/100.17×100%≈0.2%
③50×8%/100×100%=4%
④6.4/106.4×100%≈6.0%
所以四种溶液中溶质的质量分数由大到小的顺序排列正确的是①④③②,即C.