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Cp=ms*100%/mr
ms=Cp*mr/100%
m=V*d
V=m/d
1.
mr=150g
Cp=18%
ms=18%*150g/100%=27g
mw=150g-27g=123g
V=123/1=123cm³
2.
mr1=200*1,2=240g
Cp1=15%
ms=15%*240/100%=36g
mw dodanej=100*1=100g
mr2=240g+100g=340g
Cp2=36g*100%/340=10,59%
3.
Vr=500cm³
d-1,84g/cm³
mr=1,84*500=920g
Cp=96%
ms=96%*920/100%=883,2g
mw=920g-883,2g=36,8g
4.
Vr=0,5dm³=500cm³
d=1,5g/cm³
mr=500*1,5=750g
Cp=12%
ms=12%*750g/100%=90g
mw=750g-90g=660g
5.
mr=200g
Cp=2%
ms=2%*200g/100%=4g
m alkoholu=200g-4g=196g
d alkoholu=0,79g/cm³
V alkoholu=196/0,79=248,1cm³