Make salt formulas for metals, potassium, magnesium and Fe3.

Salts are compounds of metals with acidic residues. Potassium salts: KNO3 – potassium nitrate; K2SO4 – potassium sulfate; K2SO3 – potassium sulfite; K3PO4 – potassium orthophosphate; K2S – potassium sulfide; K2CO3 – potassium carbonate; KPO3 – potassium phosphate; KI – potassium iodide; КСL – potassium chloride; KBr, potassium bromide; KF – potassium fluoride. Magnesium salts: Mg (NO3) 2 – magnesium nitrate; MgSO4 – magnesium sulfate; MgSO3 – magnesium sulfite; MgPO4 – magnesium orthophosphate; MgS – magnesium sulfide; MgCO3 – magnesium carbonate; Mg (PO3) 2 – magnesium phosphate; MgІ2 – magnesium iodide; MgСL2 – magnesium chloride; MgBr2 – magnesium bromide; MgF2 – magnesium fluoride. For ferric salts: Fe (NO3) 3-iron nitrate; Fe2 (SO4) 3 – ferrous sulfate; Fe2 (SO3) 3 – iron sulfite; FePO4 – iron orthophosphate; Fe2S3 – iron sulfide; Fe2 (CO3) 3 – iron carbonate; Fe (PO3) 3 – iron phosphate; FeI3 – iron iodide; FeСL3 – ferric chloride; FeBr3 – iron bromide; FeF3 – iron fluoride.