Question

Va roggg! AJUTOR. DAU CORONITA

Answer 1

-calculez masa de CaO PUR

P= m,px100/mi--> m,p= 140x80/100g= 112gCaO

- calculez masa de var stins care se obtine

1mol.....................1mol

CaO + H2O---> Ca(OH)2                         M,CaO= 56g/mol;  M,Ca(OH)2=74g/mol

56g...............................74g

112g.............................x=m=148gCa(OH)2

-calculez masa de Cu(OH)2, din reactia          

1mol.......................................1mol..........       M,Cu(OH)2=81g/mol

Ca(OH)2   +  CuSO4---> Cu(OH)2↓ +CaSO4

74g.............................................81g

148g..............................................x=m=162g Cu(OH)2

-calculez conc.procentuala in CuSO4

M,CuSO4.5H2O= (160gCuSO4 + 90gH2O)/mol=250g/mol

250g piatra vanata,....contine  160gCuSO4...........90gH2O

50g.......................................x= 32gCuSO4......................Y= 18g apa

deci in relatia  c=mdx100/m2

md=m,CuSO4=32g

ms= md+m,apa+m,apa din piatra vanata=32g+150g+18g=200g

c= 32x100/200=...........................calculeaza !!!!