Dane:
m=10 g
M=40 g/mol
V=500 cm3=0,5 dm3
Szukane:
n=?
n=m/M
Cm=?
Cm=n/V
Obliczenia:
n=10 g/40 g/mol
n=0,25 mol
Cm=0,25 mol/0,5 dm3
Cm=0,5 mol/dm3
Odpowiedź: Cmol=0,5mola/dm3
Cmol=ms/M *v
MNaOH= 23g/mol+16g/mol +1g/mol=40g/mol
V=500cm3 =0,5dm3
ms=10g
podstawiamy:
Cmol=10g/ 40g/mol*0,5dm3=0,5mola/dm3
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Dane:
m=10 g
M=40 g/mol
V=500 cm3=0,5 dm3
Szukane:
n=?
n=m/M
Cm=?
Cm=n/V
Obliczenia:
n=10 g/40 g/mol
n=0,25 mol
Cm=0,25 mol/0,5 dm3
Cm=0,5 mol/dm3
Odpowiedź: Cmol=0,5mola/dm3
Cmol=ms/M *v
MNaOH= 23g/mol+16g/mol +1g/mol=40g/mol
V=500cm3 =0,5dm3
ms=10g
podstawiamy:
Cmol=10g/ 40g/mol*0,5dm3=0,5mola/dm3