Important oxidizing and reducing agents

Some important oxidations carried out with permanganate ions are as follows  

Mn02 is a darkish-brown precipitate. As an example the oxidation of manganese(II) salts can serve  

As H+ ions are formed, which might reverse the reaction, buffers have to be used. The reaction is utilized for the titrimetric determination of manganese, when ZnO is normally used as buffer. 

The oxidation number of manganese in manganate is + 6. MnOj- ions exhibit a characteristic green colour. When permanganate is heated with alkalis, such a reduction takes place and oxygen is formed  

Potassium dichromate K2Cr201 This strong oxidizing agent is an orange-red solid, which produces an orange solution in water. In strongly acid solutions dichromate ions are reduced to chromium(III)  

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