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mr=25g
Cp=5%
Cp=ms*100%/mr
ms=Cp*mr/100%
ms=5*25/100%
ms=1,25g KCl
100%....... ...........3g 100%
..........3%
0%.......... ...........97g 0%
3g sacharozy ------------- 100g roztworu
x-------------------------------- 240g roztworu
x=7,2g sacharozy
240g-7,2g=232,8g wody