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Brown Ring Test

Why is freshl...

Question

Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?

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Solution

A freshly prepared ferrous sulphate is used in the test because ferrous sulphate on exposure to the atmosphere is oxidised to ferric sulphate and the test will not be positive with ferric sulphate.

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Q. (a) Explain with the help of a balanced equation the brown ring test for nitric acid.
(b) Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test? [5 MARKS]

In brown ring test, a freshly prepared ferrous sulphate solution is used because:

(a) Explain with the help of a balanced equation, the brown ring test for nitric acid.

(b) Why is freshly pepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test ?

Q. (a) Explain with the help of a balanced equation, the brown ring test for nitric acid.
(b) Why is freshly prepared ferrous sulphate solution used in the ring test?
(c) Brown ring disappears if the test tube is disturbed.

Why it is advisable to freshly prepare Ferrous sulphate solution for experiments?

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