Do 50-procentowego roztworu kwasu azotowego o gęstości1,3 g/cm3 i objętości 1 litr dodano 500cm3 wody. Oblicz stężenie procentowe otrzymanego roztworu.
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mr₁=1l*1,3g/cm³=1dm³*1,3g/cm=1000cm³*1,3g/cm³=1300g
Cp₁=50%
ms₁=?
Cp=ms/mr * 100% /*mr
Cp*mr=ms*100% /:100%
ms=Cp*mr/100%
ms₁=50%*1300g/100%
ms₁=650g
ms₂=ms₁=650g
mr₂=1300g+(500cm³*1g/cm³)=1800g
Cp₂=?
Cp₂=650g/1800g * 100%
Cp₂=36,1%