Do 190 gramó roztworu soli o stężeniu 5% dosypano 10g soli. Oblicz stężenie otrzymanego roztworu.
Z def. stęż. procent.
5g soli----100g roztworu
xg soli-----190g roztworu
x = 9,5g soli
DOSYPANO 10g soli, więc
19,5g soli-----200g roztworu
xg soli---------100g roztworu
x = 9,75g soli
x = 9,75%
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Z def. stęż. procent.
5g soli----100g roztworu
xg soli-----190g roztworu
x = 9,5g soli
DOSYPANO 10g soli, więc
19,5g soli-----200g roztworu
xg soli---------100g roztworu
x = 9,75g soli
x = 9,75%