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mrozp = 45 g
mr = ms + mrozp
mr = 5g +45g
mr = 50g
Cp = ms*100% / mr
Cp = 5 *100% / 50
Cp = 500% / 50
Cp = 10%
m.rozp.=45g
m.roztworu=45g+5g=50g
C%=m.s razy 100%/mr
C%=5g razy 100%/50g
C%=10%
ms-masa substancji
mr-masa roztworu
ms=5g
mr=45g+5g=50g
Cp=5g/50g * 100% = 10%
Odp: Stężenie procentowe roztworu jest równe 10%.