Jakie jest steżenie procentowe roztworu, gdy do 300g 5% roztworu dodamy 10 g substancji?
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Cp=5%
mr=300g
Cp=ms/mr *100% => ms=mr*Cp/100%
ms=300g*5%/100%=15g
ms₂=15g+10g =25g
mr₂=300g+10g =310g
Cp₂=25g/310g * 100% ≈ 8%