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mr = x
ms = 20%*x = 0,2x
II roztwór:
mr = x
ms = 50%*x = 0,5x
III roztwór (suma I i II):
mr = x+x = 2x
ms = 0,2x+0,5x = 0,7x
Cp = (0,7x/2x)*100% = 0,35*100% = 35%
cp1= 20% mr1= 100g ms1=20g
cp2= 50% mr2=100g ms2=50g
cp3=? mr3=?(200g) ms3= ? (70g)
rozwiązanie:
ms3=50g+20g=70g
mr3=100g+100g=200g
cp3=70g/200grazy100%=35%
^
zapisz w ułamku
to jest dobrze na 100%