1oblicz ile g. soli znajduje się w 100g sześciennych 15% roztworu o gęstości 1.1 g na cm sześcienny 2. W ilu g 20% roztworu znajduje się 40g soli
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zad.1
Vr=100cm³
Cp=15%
d=1,1g/cm³
mr=?
ms=?
d=mr/Vr /*Vr
mr=d*Vr
mr=1,1g/cm³ * 100cm³
mr=110g
Cp=ms/mr * 100% /*mr
Cp*mr=ms*100% /:100%
ms=Cp*mr/100%
ms=15%*110g/100%
ms=16,5g
zad.2
ms=40g
Cp=20%
mr=?
Cp=ms/mr * 100% /*mr
Cp*mr=ms*100% /:Cp
mr=ms*100%/Cp
mr=40g*100%/20%
mr=200g