v=200cm3
d=1,1g/cm3
m=v*d
m=200*1,1
m = 220g
Z def. stęż. procent.
20g subst-----100g roztworu
xg subst-------220g roztworu
x = 44g subst.
DOLANO 100g wody, więc
44g subst------320g roztworu
xg subst--------100g roztworu
x = 13,75g subst.
x = 13,75%
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v=200cm3
d=1,1g/cm3
m=v*d
m=200*1,1
m = 220g
Z def. stęż. procent.
20g subst-----100g roztworu
xg subst-------220g roztworu
x = 44g subst.
DOLANO 100g wody, więc
44g subst------320g roztworu
xg subst--------100g roztworu
x = 13,75g subst.
x = 13,75%