6.
Vs= 2 L, p = 1,1 kg/dm3 (L) , md= 440 g = 0,44 kg
c% = mdx100/ms
stim p = ms/Vs => ms = pxVs = 2x1,1 = 2,2 kg sol.
=> c% = 0,44x100/2,2 = 20%
7. Ai o eroare in valorile conc....?!
Intotdeauna conc. finala are valoare intre cele dou conc. ale solutiilor care s-au amestecat... la tin este mai mica decat 30%...????!!!!
8.
m.apa= 100g, ms1= 200g, c1%=15%
c% = mdx100/ms
=> md = ms1xc1/100 = 200x15/100 = 30g
ms2 = ms1+m.apa = 200+100= 300g
md = constant
=> c2% = mdx100/ms2 = 30x100/300 = 10%
9.
la 100g sol ....... 80 g md
=> m.solvent = 100-80 = 20g
=> m.solvent : m.solvat = 20 : 80 = 1:4
10.
1-difuziune sau difuzie
2-procentuala
3-nesaturata
4-temperatura, agitatia sau maruntirea
5-saturata
6-suprasaturata
7-solutie