1)
Z def. steż. procent.
100g roztworu ---- 50g subst.
12g roztworu ----- xg subst.
x = 6g subst.
100g roztworu ---- 30g subst.
xg roztworu ------- 6g subst.
x = 20g roztworu
2)
mr=500g
Cp=30%
ms=Cp*mr/100%
ms=500*30/100
ms=150g subst.
500g roztworu-150g subst. = 350g wody
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1)
Z def. steż. procent.
100g roztworu ---- 50g subst.
12g roztworu ----- xg subst.
x = 6g subst.
100g roztworu ---- 30g subst.
xg roztworu ------- 6g subst.
x = 20g roztworu
2)
mr=500g
Cp=30%
ms=Cp*mr/100%
ms=500*30/100
ms=150g subst.
500g roztworu-150g subst. = 350g wody