oxidises sulphite to sulphate 2MnO + 5SO + 6H 2Mn + 5SO + 3H O + XII U4-D-Block-Jerald XII U4-D-Block-Jerald - - - - Uses of potassium permanganate: Some important uses of potassium permanganate are listed below. . It is used as a strong oxidizing agent. .
It is used for the treatment of various skin infections and fungal infections of the foot. . It used in water treatment industries to remove iron and hydrogen sulphide from well water. .
It is used as Bayer’s reagent for detecting unsaturation in an organic compound. . It is used in quantitative analysis for the estimation of ferrous salts, oxalates, hydrogen peroxide and iodides. Note HCl cannot be used for making the medium acidic since it reacts with KMnO as follows.
2MnO + Cl + 16H 2Mn + 5Cl + 8H O + + → HNO also cannot be used since it is good oxidising agent and reacts with reducing agents in the reaction. However,H SO is found to be most suitable since it does not react with potassium permanganate. Equivalent weight of KMnO in acid medium = Molecular weight of KMnO no of mols of electrons transf erred = = . Equivalent weight of KMnO in basic medium = Molecular weight of KMnO no of mols of electrons transfe rred = = Equivalent weight of KMnO in neutral medium = Molecular weight of KMnO no of mols of electrons transfe rred = = .
f-block elements – Inner transition elements In the inner transition elements there are two series of elements. ) Lanthanoids ( previously called lanthanides) ) Actinoids ( previously called actinides) Lanthanoid series consists of fourteen elements from Cerium ( Ce) to Lutetium ( Lu) following Lanthanum ( La).These elements are characterised by the preferential filling of 4f orbitals, Similarly actinoids consists of elements from Thorium ( Th) to Lawrencium ( Lr) following Actinium ( Ac).These elements are characterised by the preferential filling