Question

20度时,将某盐W的溶液蒸发10g水后恢复到原温,须向剩余的溶液中加入6gW（无结晶水）溶液达到饱和；若将原

Answer 1

我也做到这道题了呵呵.

设原溶液中W有 x g ,水有 y g ,s 溶解度.

则由题意有：(x+6)/(y-10) = (x+1)/(y-30) = s/100

根据比例性质（关键）：(x+6)/(y-10) = (x+1)/(y-30)

= [(x+6)-(x+1)]/[(y-10)-(y-30)] = 5/20 = 25/100

∴s=25 g/100g水.