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Wypisz dane:
mr = 320[g].
cp = 6[%].
Zastosuj wzór na ms:
ms = (cp * mr ) / 100[%].
Obliczenia:
ms = (6[%]*320[g] ) / 100[%] = 1920 /100 = 19,2[g].
mr = ms + mw.
mw = mr - ms.
mw = 320[g] - 19,2[g] = 300,8[g] H2O.
Odp. Należy 19,2[g] soli rozpuścić w 300,8[g] H2O.
mr = 320g
Cp = 6%
ms = ?
ms = Cp x mr / 100
ms = 6 x 320 / 100
ms = 19,2
m rozpuszczalnika = 320 - 19,2 = 300,8