Do 400g 20% roztworu cukru dodano 120g wody. Jakie jest stężenie procentowe nowego roztworu?
Cp= ms * 100% / mr
ms = Cp * mr / 100%
ms = 20% * 400g / 100%
ms = 80g
mr 2= 400 g + 120 g = 520 g
Cp = ms * 100%/ mr2
Cp= 80 g * 100%/ 520g
Cp ≈ 15,4 %
;)
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Cp= ms * 100% / mr
ms = Cp * mr / 100%
ms = 20% * 400g / 100%
ms = 80g
mr 2= 400 g + 120 g = 520 g
Cp = ms * 100%/ mr2
Cp= 80 g * 100%/ 520g
Cp ≈ 15,4 %
;)