Odpowiedź :
Z def. stęż. procent.
8g soli------92g wody (100g roztworu - 8g soli)
xg soli------9200g wody
x = 800g soli
Cp=8%
mw=9,2kg=9200g
ms=?
Cp=ms/(ms+mw)*100%
8%=ms(ms+9200g) * 100% /(ms+9200g)
8ms+73600g=100ms
92ms=73600 /:92
ms=800g=0,8kg