Cu=CuS=CuCl2=Cu(OH)2=H2O=H3PO4=Na3Po4=Co(PO4)2

Question

Cu=CuS=CuCl2=Cu(OH)2=H2O=H3PO4=Na3Po4=Co(PO4)2

Answer 1

Сu + S -> CuS
CuS + 2HCl -> CuCl2 + H2S
CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl
Cu(OH)2 -> CuO + H2O
P2O5 + 3H2O -> 2H3PO4
H3PO4 + 3NaOH -> Na3PO4 + 3H2O
2Na3PO4 +3 CoCl2 -> Co3(PO4)2 +6 NaCl