The reaction between nitric acid and sodium hydroxide solution produce sodium nitrate salt. Describe one confirmatory test for the anion of this salt.

Md Ariful Islam

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Md Ariful Islam

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A brown ring test can be used as confirmatory test fot nitrate anion.

Step 1: Take the solution of nitrate.

Step 2: Add iron(II) sulfate

Step 3: Slowly add concentrated sulphuric acid (H2SO4) such that the acid added forms a layer below the aqueous solution.

Result – A ring brown in color will be formed at the junction of the 2 layers. This indicates the presence of nitrate ion.

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