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how to prepare potassium dichromate from chromite ore?
4Fe2CrO4 + 8Na2CO3 + 7O2 →
how to prepare potassium permanganate from pyrolusite ore?
potassium permanganate is a ___________________ agent
strong oxidizing agent
iodine is liberated from potassium iodide
Fe2+ ion is converted to Fe3+
Oxalate ion or oxalic acid is oxidised at 333 K:
Hydrogen sulphide is oxidised, sulphur being precipitated:
Sulphurous acid or sulphite is oxidised to a sulphate or sulphuric acid
Nitrite is oxidised to nitrate:
A notable reaction is the oxidation of iodide to iodate:
Thiosulphate is oxidised almost quantitatively to sulphate:
Manganous salt is oxidised to MnO2 ; the presence of zinc sulphate or zinc oxide catalyses the oxidation:
how to convert chromate to dichromate
how to convert dichromate to chromate
Note 
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