Ile gramów siarczanu (VI ) sodu znajduje się w 300 cm sześciennych 2-molowego roztworu ?
Cm=2mol/dm³
Vr=300cm³=0,3dm³
M(Na₂SO₄)=2*23g/mol+32g/mol+4*16g/mol=142g/mol
Cm=n/Vr /*Vr
n=Cm*Vr
n=2mol/dm³ * 0,3dm³
n=0,6mol
n=ms/M /*M
ms=n*M
ms=0,6mol * 142g/mol
ms=85,2g
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Cm=2mol/dm³
Vr=300cm³=0,3dm³
M(Na₂SO₄)=2*23g/mol+32g/mol+4*16g/mol=142g/mol
Cm=n/Vr /*Vr
n=Cm*Vr
n=2mol/dm³ * 0,3dm³
n=0,6mol
n=ms/M /*M
ms=n*M
ms=0,6mol * 142g/mol
ms=85,2g