1
a. saramura
solvent = apa lichida , solvat = sarea de bucatarie solida
solutie lichida
b. apa carbogazoasa
solvent = apa lichida , solvat = dioxid de carbon gazos
solutie lichida
c. sirop
solvent = apa lichida , solvat zahar solid
solutie lichida
2.
deoarece la cald este favorizat eliberarea dioxidului de carbon din solutia de apa carbocazoasa.
Cresterea temperaturii scade solubilitatea gazelor in apa
3.
md = 30g, m.apa= 120g
=> ms = md+m.apa = 30+120 = 150g
c% = mdx100/ms
= 30x100/150 = 20%
4.
ms = 300g , c% = 25%
=> md = msxc%/100
= 300x25/100 = 75 g zahar
=> m.apa = ms-md = 300-75 = 225 g apa
5.
ms1 = 380g , c1% = 20%
=> md = 380x20/100 = 76 g
ms2 = ms1-m.apa.evaporata = 380-a
c2% = 2xc1% = 2x20 = 40%
=> 40 = 76x100/(380-a)
=> a = 7600/40 = 190 g apa evaporata
