przygotowano 3 probki 15% roztworu soli po 200g kazda. do 1 dodano 30g tej soli. B)do 2 dodano 100g wody c) z trzeciej odparowano 50g wody. oblicz stezenie procentowe otrzymanych roztworow
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Cp = ms/mr*100%
15% = ms/200*100%
mr = 200g - masa roztworu (substancja + rozpuszczalnik)
ms = 30g soli - pierwotny stan
a
Cp = (ms +30)/(mr +30)*100% = 26,09%
b
Cp = (ms +0)/(mr +100)*100% = 10%
c
Cp = (ms +0)/(mr -50)*100% = 20%