Ile gramów KOH można otrzymać po odparowaniu do sucha 0,5 dm³ dwudziestoprocentowego roztworu potasu o gęstości 1,18 g/cm³?
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Vr=0,5dm³=500cm³
d=1,18g/cm³
Cp=20%
mr=?
ms=?
d=mr/Vr /*V
mr=d*Vr
mr=1,18g/cm³*500cm³
mr=590g
ms=?
Cp=ms/mr * 100% /*mr
Cp*mr=ms*100% /:100%
ms=Cp*mr/100%
ms=20%*590g/100%
ms=118g