1mol.........................................1mol
Fe + CuSO4-------> FeSO4 + Cu
56g............................................64g
cand se"dizolva" 1 mol de fier ,se depune 1 mol de Cu---> masa placii variaza cu Δm=64-56g
1molCu(64g).................Δm= 8g
x.........................1,6g
x= 1,6x64/8= g Cu depus