Odpowiedzi

2009-09-30T13:37:42+02:00
Zadanie 1:
Dane:
ms(jodu)=3g
V alkoholu=50cm3
d alkoholu= 0,799g/cm3
Cp=?


m alkoholu=d alkoholu*V alkoholu=0,799g/cm3* 50cm3=39,95g

mr=ms + m rozpusz= 3+39,95=42,95g

Cp= ms *100%/mr= 3*100%/42,95=6,98%

Zadanie 2:
Dane:
Vr=150cm3=0,15dm3
ms(CaCl2)=50g
Cmol=?

MCaCl2=40+2*35,5=111g/mol
n CaCl2=m/M=50/111=0,45mola
Cmol=n/V=0,45mola/0,15dm3=3mol/dm3