do 50 g 4 procentowego roztworu kwasu siarkowego wprowadzono 10 g siarkowodoru.
Oblicz stężenie procentowe otrzymanego roztworu
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mr₁=50g
Cp₁=4%
ms₁=?
Cp=ms/mr * 100% /*mr
Cp*mr=ms*100% /:100%
ms=Cp*mr/100%
ms₁=4%*50g/100%
ms₁=2g
ms₂=2g+10g=12g
mr₂=50g+10g=60g
Cp₂=?
Cp=ms/mr * 100%
Cp₂=12g/60g * 100%
Cp₂=20%