NiCl2-Ni(OH)2-NiSO4-(NiOH)2SO4-NiSO4

Question

NiCl2-Ni(OH)2-NiSO4-(NiOH)2SO4-NiSO4

Answer 1

NiCl2+NaOH=Ni(OH)2 +2NaCl
Ni(OH)2+H2SO4=NiSO4 +2H2O
2NiSO4+2H2O=(NiOH)2SO4 +H2SO4
(NiOH)2SO4+H2SO4=2NiSO4+2 H2O