Dane:
V=300 cm3=0,3 dm3
m=4 g
M BaCl2=137 g/mol+2*35,5 g/mol=208 g/mol
Szukane:
n=?
n=m/M
Cm=?
Cm=n/V
Obliczenia:
n=4 g/208 g/mol
n=0,02 mol
Cm=0,02 mol/0,3 dm3
Cm=0,07 mol/dm3
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Dane:
V=300 cm3=0,3 dm3
m=4 g
M BaCl2=137 g/mol+2*35,5 g/mol=208 g/mol
Szukane:
n=?
n=m/M
Cm=?
Cm=n/V
Obliczenia:
n=4 g/208 g/mol
n=0,02 mol
Cm=0,02 mol/0,3 dm3
Cm=0,07 mol/dm3