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Cp =20%
Cp=ms/mr*100%
ms=mr*Cp/100%
ms=200*20/100
ms=40g
mw=200-40=160g
Cp nowego roztworu:
ms=40g+20g=60g
mw=160+50=210
mr=ms+mw
mr=60+210=270g
Cp=ms/mr*100%
Cp=60/270*100
Cp=22,2%
Odp: Stężenie procentoweg otrzymanego roztworu, wynosi 22,2%
Mr2=70g
Mr3=270g
Ms1=40g
Ms2=20g
Ms3=60g
Cp1=20 %
Cp2=28.57%
Cp3= (Ms3/Mr3)*100%= 60/270 *100=22,22%
200+50+20=270g
270 - 100%
60 - x%
x=(60*100)/270
x=22,2%