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Cp1=10%
m roztw1=250ml
m s1 = 25 g
2.
Cp2 = 6%
m roztw2=50ml
m s2 = 3 g
3.
m roztw3 = 250ml +50ml+ 1100ml = 1400ml
m s3 = 25g +3g = 28g
Cp3 = ?
Cp3 = 28g * 100% : 1400g = 2 %
Cp3=2%