How can change in metal speciation (change in oxidation state of metal) in a solvent could be determined ?
Snigdha Mishra
The metal does not change its oxidation state in different solvents. An element in various chemical compounds changes its oxidation state. For example, the element manganese changes the oxidation state in the compounds MnCl2, KMnO4.
If the metal is affected by electrolytic treatment, then in various solvents a film of oxidized solvent compounds, for example, ethyl alcohol, may appear on its surface.
To do this, a Cr metal electrode (an appropriately cleaned plate) is used and placed in a temperature-controlled electrochemical cell with separated anode and cathode spaces. A reference electrode, a saturated silver chloride electrode, is placed in the cell. Galvanostatic measurements are carried out using a pulse potentiostat with a recorder and a voltmeter.
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