英文化学题!求解!Find the percent by mass of sodium chloride in a 1.

来源：学生作业帮编辑：作业帮分类：化学作业时间：2024/05/23 21:01:23

英文化学题!求解!
Find the percent by mass of sodium chloride in a 1.35M NaCl solution. the density of the solution is 1.05g/mL

1.35 mol/L的 NaCl溶液的质量分数是多少
假设溶液体积是1000 mL,那么溶液质量 = 1000 ÷ 1.05 = 952.38 g
溶质质量 = 1.35 × (23+35.5) = 78.975 g
质量分数 = 78.975 ÷ 952.38 = 0.0829 = 8.29%
再问：溶液质量应该是1000×1.05吧
再答：哦哦！有弄错了。。。对不起啊假设溶液体积是1000 mL，那么溶液质量 = 1000 × 1.05 =1050 g 溶质质量 = 1.35 × (23+35.5) = 78.975 g 质量分数 = 78.975 ÷ 1050 = 7.52%

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