The complex formed during the brown ring test | vedclass

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Question

(A) The brown ring test is a common chemical test for the detection of nitrate ions $(NO_3^-)$.When a freshly prepared ferrous sulfate $(FeSO_4)$ solu

Vedclass · Accepted Answer

$[Fe(H_2O)_5NO]SO_4$

Vedclass · Answer

(A) The brown ring test is a common chemical test for the detection of nitrate ions $(NO_3^-)$.When a freshly prepared ferrous sulfate $(FeSO_4)$ solution is added to a solution containing nitrate ions,followed by the careful addition of concentrated sulfuric acid $(H_2SO_4)$ along the sides of the test tube,a brown ring is formed at the interface.The reaction involves the reduction of nitrate to nitric oxide $(NO)$,which then reacts with the hexaaquairon$(II)$ complex to form the brown-colored complex known as pentaaquanitrosyliron$(II)$ sulfate,represented as $[Fe(H_2O)_5NO]SO_4$.

The complex formed during the brown ring test of nitrate $(NO_3^-)$ ion is:

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