Ce masa de apa trebuie evaporata din 380 g solutie de sare de c%=20% pt a i se dubla concentratia

Răspuns :

ms1=380g

c1=20%

c2=40%

m,apa?

c=mdx100/ms---> md1= 20x380/100g=76g

md2=md1

c2= md2x100/ms2-----> ms2= 76x100/40g= 190g

m,apa= ms1-ms2= 380g-190g=190g