Do 250 gram wody dodano 25 gram soli kuchennej. Oblicz stężenie procentowe otrzymanego roztworu.
ma- masa wody
ma=250g
ms=25g
mr=250g+25g=275g
%
Dane:
ms=25g.
mw=250g.
Szukane:
mr=?
cp=?
Wzory:
mr=ms+mw
cp=ms/mr*100%
Obl.:
mr=25g+250g=275g.
cp=25g/275g*100%=2500g/275g=9,09%
Odp.:Cp=9,09%.
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ma- masa wody
ma=250g
ms=25g
mr=250g+25g=275g
%
Dane:
ms=25g.
mw=250g.
Szukane:
mr=?
cp=?
Wzory:
mr=ms+mw
cp=ms/mr*100%
Obl.:
mr=25g+250g=275g.
cp=25g/275g*100%=2500g/275g=9,09%
Odp.:Cp=9,09%.