用20gNaOH配成500ml溶液,取出1mL用水稀释到100mL,所得溶液中溶质的c是?,含Na+?克
人气:461 ℃ 时间:2019-10-18 08:44:20
解答
20/40==0.5mol
0.5/0.5=1mol/L
取出1mL用水稀释到100mL,所得溶液中溶质的c是
1*0.001/0.1==0.01mol/L
0.01*0.1*23==0.023g
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