CBSE Class 12-science Answered
reaction
Asked by | 26 Jan, 2009, 03:11: PM
Expert Answer
NO3- is tested using brown ring test.
To perform this test in the laboratory, an aqueous solution of salt is taken. Dilute ferrous sulphate is aded to it. Then from the sides of the tube conc. sulphuric acid is added. A brown ring is formed at the junction of two layers.
NO3-+3Fe2++ 4H+
NO +3Fe3+ + 2H2O
[Fe(H2O)6]2+ +NO [Fe(H2O)5(NO)]2+ + H2O
brown colour
Answered by | 28 Jan, 2009, 10:49: AM
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