Completeaza ecuatia reactilor si stabiliti coeficientii .
A).....MnCL2 +......Naoh---->.......NaCL +........................ sageata in jos
b) ....Ni(No3)2 + ...ZN----> ...Ni sageata in jos +......
c)....Al(OH)3--->............ +....H2O
d)...H2O+...Ba---->...........+........H2 linie in sus
e)....K2O+...CO2--->..............