Hajde da uzmemo npr. 1 dm3 rastvora (1 litar). Preko gustine, izracunacemo da je masa tog rastvora mr=ro*V=1.183 g/cm3 * 1000 cm3=1183g U tom rastvoru postoji n=cV=0.1mol/dm3 * 1dm3=0.1 mol supstance HCl. Molarna masa HCl-a je M=36.5 g/mol, pa je masa supstance HCl u rastvoru ms=M*n=36.5 g/mol*0.1mol=3.65g Maseni udeo HCl-a je onda jednak: w%(HCl)=(ms /mr)*100%=3.65g * 100%/1183g=0.31%
Pozdrav! :)
"A new scientific truth does not triumph by convincing opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it"Max Planck
Hajde da uzmemo npr. 1 dm3
Hajde da uzmemo npr. 1 dm3 rastvora (1 litar). Preko gustine, izracunacemo da je masa tog rastvora mr=ro*V=1.183 g/cm3 * 1000 cm3=1183g
U tom rastvoru postoji n=cV=0.1mol/dm3 * 1dm3=0.1 mol supstance HCl. Molarna masa HCl-a je M=36.5 g/mol, pa je masa supstance HCl u rastvoru ms=M*n=36.5 g/mol*0.1mol=3.65g
Maseni udeo HCl-a je onda jednak:
w%(HCl)=(ms /mr)*100%=3.65g * 100%/1183g=0.31%
Pozdrav! :)
"A new scientific truth does not triumph by convincing opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it" Max Planck
Hvala! :)
Hvala! :)