Do 40 gramów 8% roztwotu soli doalno 10 gram wody. Oblicz stężenie procentowe roztworu.
mr(1)=40g
Cp(1)=8%
ms=Cp·mr/100%
ms=8%·40g/100%=3,2g
mr(2)=40g+10g=50g
Cp=ms·100%/mr
Cp(2)=3,2g·100%/50g=6,4%
0dp.: Stężenie procentowe wynosi 6,4%.
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mr(1)=40g
Cp(1)=8%
ms=Cp·mr/100%
ms=8%·40g/100%=3,2g
mr(2)=40g+10g=50g
Cp=ms·100%/mr
Cp(2)=3,2g·100%/50g=6,4%
0dp.: Stężenie procentowe wynosi 6,4%.