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Cp=12%
mr=60g
ms=Cp*mr/100%
ms=12*60/100
ms=7,2g
Dodano 20g csoli, więc:
ms=7,2g+20g=27,2g
mr=60g+20g=80g
Cp=ms*100%/mr
Cp=27,2*100/80
Cp = 34%
2)
75g roztworu - 25g subst. = 50g wody
25g subst. ---- 50g wody
xg subst. ----- 100g wody
x = 50g