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CuS04+......->Cu(OH2)+ K2S04
KOH+SO3-> .....+....
Na2CO3+ HCL-> ....+...
Mg(OH2)+...> MgSO4+H20
....+....->CaCl2+H2
Fe2O3+H3PO4->....+.....
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CuS04+2KOH->Cu(OH)2+ K2S04
2KOH+SO3-> K2SO4+H2O
Na2CO3+ 2HCL->H2CO3+2NaCl
Mg(OH)2+SO3> MgSO4+H20
2HCl+Ca->CaCl2+H2
3Fe2O3+2H3PO4->2Fe3PO4+3H2O