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Cp=10%
Dane Vr=2 dm^3=2000 cm^3
Cp=10%
gr=1,115g/cm^3
1) gr=mr/v---mr=gr*vr
mr=1,115%g/cm^3*2000cm^3
mr=2230g
II)1,115g-1cm^3
x--2000cm^3
x=1,115*2000
mr=2230g
Cp=ms/mr*100
ms=Cp*mr/100%
ms=223g
ms=?
V = 2dm^3 = 2000 cm^3
Cp = 10%
d = 1,115g/cm^3
MASA R-RU ZE WZORU NA GĘSTOŚĆ:
d = mr/V
mr = d * V
mr = 1,115 * 2000
mr = 2230g
MASA SUBSTANCJI ZE WZORU NA STĘŻENIE PROCENTOWE:
Cp = ms/mr * 100%
Cp * mr = ms * 100%
ms = ( Cp * mr ) : 100%
ms = ( 10% * 2230g) : 100%
ms =223g
ODP: 223 gramy wodorotlenku sodu potrzeba do przygotowania 2 dm^3 10% roztworu o gęstości 1,115g/cm^3
Cp=10%
gr=1,115g/cm^3
gr=mr/v---mr=gr*vr
mr=1,115%g/cm^3*2000cm^3
mr=2230g
1,115g-1cm^3
x--2000cm^3
x=1,115*2000
mr=2230g
Cp=ms/mr*100
ms=Cp*mr/100%
ms=223g