2Ni+O2=2NiO
NiO+2HCl=NiCl2+H2O
NiCl2+2NaOH=Ni(OH)2+2NaCl
Ni(OH)2+HNO3=NiOHNO3+H2O
NiOHNO3+HNO3=Ni(NO3)2+H2O
2Ni+O2=2NiO
NiO+2HCl=NiCl2+H2O
NiCl2+2NaOH=Ni(OH)2+2NaCl
Ni(OH)2+HNO3=NiOHNO3+H2O
NiOHNO3+HNO3=Ni(NO3)2+H2O