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d=1,5kg/dm3=1500g/dm3
Cm=cp*d/100 Mm= 60*1500 g/9800=9,18 mol/dm3
V2= 5dm3
cp2=12%
d2=1,08kg/dm3-1080kg/dm3
Cm2=cp2*d2/100Mm=12*1080/9800=1,32 mol/dm3
Cm2=n/V2 n=Cm2*V2=1,32*5=6,6mol/dm3
Cm1=9,18mol/dm3
n=6,6mol
V1=n/Cm1=6,6/9,18=0,719dm3=719 cm3
Odp. Roztworu 60% trzeba wziąć 719 cm3, stężenie molowe roztworu 12% wynosi 1,32 mol/dm3