Do 200cm3 roztworu o stężeniu 15% i gęstości 1,2g/cm3 dodano 60cm3 wody. Oblicz stężenie procentowe roztworu.
V=200cm3
Cp= 15%
d=1,2 g/cm3
ms=mr*Cp/100%=240g*15%/100%=36g
d=m/V
mr=d*V=1,2g/cm3*200cm3=240g
Cp=ms*100%/mr
mr=240g + 60g= 300g
Cp= 36g*100%/300g=12%
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V=200cm3
Cp= 15%
d=1,2 g/cm3
ms=mr*Cp/100%=240g*15%/100%=36g
d=m/V
mr=d*V=1,2g/cm3*200cm3=240g
Cp=ms*100%/mr
mr=240g + 60g= 300g
Cp= 36g*100%/300g=12%