Question

Stabiliti coeficientii pt urmatoarele reactii chimice
a] aluminiu plus oxid de fer [valenta a 3] = oxid de aluminiu plus fer
b] hidroxid de cupru [valenta a 2] plus acid sulfuric = sulfat de cupru [valenta a 2] plus apa
c] hidroxid de fer [valenta a 3] plus acid clorhidric = clorura de fer[valenta a3] plus apa
d] oxid de cupru [valenta a 2] plus acid clorhidric = clorura de cupru [valenta a 2]plus apa

Answer 1

a) 2Al+Fe2O3⇒Al2O3+2Fe
b) Cu(OH)2+H2SO4⇒CuSO4+2H2O
c)Fe(OH)3+3HCl⇒FeCl3+3H2O
d) CuO+2HCl⇒CuCl2+H2O