Odpowiedzi

2011-06-26T18:41:35+02:00

Cp=38%
mr=0,5kg=500 g
Cp = ms*100%/mr
ms = Cp*mr/100
ms=38*500/100
ms=190g chlorowodoru
500g roztworu - 190g chlorowodoru = 310g 
wody 


2011-06-26T18:49:08+02:00

C% = ms × 100%/mr
mr = 0,5 kg = 500g

38% = ms × 100%/500g
ms =  190g (HCl)
m wody  = mr - ms
m wody = 500g - 190 g = 310 g