Question

400g de CuO(oxid de cupru ) de puritate 80%reactioneaza cu H2(hidrogen
)Cuo+H2=>Cu + H2O
Cat cupru se obtine ?
(Repede dau inimioara )

Answer 1

-calculez masa de oxid pur
p= m,px1oo/m,i---> m,p=400x80/100= 320g CuO PUR

M,CuO=81g/mol
A,Cu= 65g/mol
-deduc masa de cupru, din ecuatia chimica
1mol.....................1mol
CuO +  H2------> Cu+  H2O
81g.....................65g
320g......................x=m,Cu= 256,8g