Z 300g 20% roztworu soli kuchennej odparowano 50g wody.oblicz stezenie procentowe otrzymanego roztworu
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Z def. stęż. procent.
20g soli-----100g roztworu
xg soli-------300g roztworu
x = 60g soli
ODPAROWANO 50g wody, więc
60g soli------250g roztworu
xg soli--------100g roztworu
x = 24g soli
x = 24%