Question

write the molecular formula of all the compounds that can be formed by the combination of the following ions Cu^2^+,
Na^+Fe^3^+,C1^-,So4^2^-.​

Answer 1

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• Cu2+, Na+, Fe3+, Cl–  SO4-2, PO4-3  
• 1) Na2SO4, NaCl, NaPO4

• 2)CuSO4, CuCl2, Cu3(PO4)2

• 3) Fe2(SO4)3, FeCl3, FePO4