Question

Urgent!!!!2.Determinati cantiatatea de apa ce trebuie evaporata din 800g solutie de
concentratie 10%, pentru a o concentra pana la 30%

Answer 1

Răspuns:

ms1=800g

C1=10%

C2=30%

md=?

md=C×ms/100=800×10/100=80g

md2=md1=80g

ms2=ms1-mapa=800-x

C2=md2×100/ms

30=80×100/(800-x)

800-x=800/3

800-x=266,67

x=800-266,67 =533,33g