Ile gramów soli i ile gramów wody nalezy użyć aby przygotować 300 gr. 40 % roztworu tej soli. Daje najj.
Cp=40%
mr=300g
ms=?
mw=?
Cp=ms/mr*100%
Cp*mr=ms*100%
ms=Cp*mr/100%
ms=40*300/100=40*3=120g tyle gramów soli
mr=mw+ms
mw=mr--ms=300-120=180g tyle gramów wody
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Cp=40%
mr=300g
ms=?
mw=?
Cp=ms/mr*100%
Cp*mr=ms*100%
ms=Cp*mr/100%
ms=40*300/100=40*3=120g tyle gramów soli
mr=mw+ms
mw=mr--ms=300-120=180g tyle gramów wody