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Oxidation state of Fe(Iron) in complex formed in Brown ring test.

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1

Step-by-step solution

The chemical test called a brown ring test is conducted to find out the presence of Nitrate ions in any solution, in which the solutions form a brown ring in the test tube. The above test is also called the brown ring test, in which the brown ring complex compound is formulated as [ Fe ( H 2 O ) 5 NO ] SO 4 . Here the oxidation state of Iron in the complex, can be found as: We can assume that the oxidation state of Iron metal is x. Here the oxidation state of the Sulphate ion is − 2 , the oxidation state of water i

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