Chemistry XII Content





Mohr’s salt or ferrous ammonium sulphate FeSO4(NH4)2 SO4.6H2O)

Hydrated ferrous ammonium sulphate is commonly known as mohr’s salt .It is prepared by crystallization of equimolar solution of FeSO4 and (NH4)2SO4.

FeSO4(aq) + (NH4)2SO4      crystallization    →         FeSO4 (NH4)2SO4.6H2O.

                                                                                    Mohr’s salt.

This double salt is more stable than FeSO4 alone and is used as reducing agent in redox fitration. During redox reaction Fe+2 ions mohr’s salt is oxidised to Fe+3 ions.

 

 (Properties same as FeSO4. 7H2O)

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