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10% w: 100g r-ru- 10g subst- 90g rozp
.........500g ------ xg
x=10g*500g/100g=50g - subst
mr-ru=500g-200g=300g
Cp=ms*100%/m r-ru
Cp=50g*100%/300g
Cp=16,(6)%
Odp. Stężenie ptocentowe wynosi 16,6%.
2.
20% w: 100g r-ru- 20g subst- 80g rozp
.........300g ------ xg
x=20g*300g/100g=60g- subst
mr-ru=300g+40g=340g
Cp=60g*100%/340g
Cp=17,64%
Odp. Stężenie ptocentowe wynosi 17,64%.