Răspuns :
Răspuns:
Explicație:
ms1= 30g sol.
c1= 12%
c2= 0,9 %
mapa adaugata
-se afla md sol.
c1= md .100 : ms1
md= c1 . ms1 : 100
md= 12 . 30 : 100 = 3,6 g sare
-se afla ms2
c2= md .100 : ms2
ms2= md.100 : c2
ms2= 3,6 . 100 : 0,9=400 g sol.
-se afla mapa adaugata
mapa adaug. = ms2 - ms1
= 400 - 30
=370 g
Răspuns:
ms1=30g
c2=0.9%
c1=12%
c1=mdx100/ms
md= c1 x ms1 / 100
md= 12 x 30 / 100 = 3,6 g sare
c2= md x100 /ms2
ms2= md x 100 / c2
ms2= 3,6x 100/0,9=400 g sol.
-se afla mH20 adaugata
mH20 adaugata = ms2 - ms1
=400-30=370