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Why is a freshly prepared solution of Fe...

Why is a freshly prepared solution of `FeSO_(4)` used for the detection of nitrate and nitrite?

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**Step-by-Step Solution:** 1. **Understanding the Role of Ferrous Sulfate (FeSO₄):** - Ferrous sulfate (FeSO₄) is used in qualitative analysis to detect the presence of nitrate (NO₃⁻) and nitrite (NO₂⁻) ions. The detection is based on a chemical reaction that occurs between the ferrous ions (Fe²⁺) and the nitrate/nitrite ions. 2. **Importance of Freshly Prepared Solution:** - A freshly prepared solution of FeSO₄ is crucial because the ferrous ions (Fe²⁺) in the solution are in a +2 oxidation state. This state is necessary for the reaction to occur effectively. ...
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Aqueous solution of FeSO_(4) does not produce precipitate with:

Aqueous solution of FeSO_(4) does not produce precipitate with:

An aqueous solution of a white salt A gives a white precipitate B on treatment with dilute HCl in cold condition. B is soluble in boiling water. An aqeous solution of A gives a yellow precipitate on treatment with a solution of K_(2)CrO_(4) . The soda extract of A is acidified with diolute H_(2)SO_(4) , boiled to remove CO_(2) and treated with a freshly prepared solution of FeSO_(4) . concentratd H_(2)SO_(4) is added to the resulting solution. a brownn ring is formed at the junction of the two layers. Q. The salt A is:

An aqueous solution of a white salt A gives a white precipitate B on treatment with dilute HCl in cold condition. B is soluble in boiling water. An aqeous solution of A gives a yellow precipitate on treatment with a solution of K_(2)CrO_(4) . The soda extract of A is acidified with diolute H_(2)SO_(4) , boiled to remove CO_(2) and treated with a freshly prepared solution of FeSO_(4) . concentratd H_(2)SO_(4) is added to the resulting solution. a brownn ring is formed at the junction of the two layers. Q. On treatment with a KI solution, an aqueous solution of A will give:

An aqueous solution of a white salt A gives a white precipitate B on treatment with dilute HCl in cold condition. B is soluble in boiling water. An aqeous solution of A gives a yellow precipitate on treatment with a solution of K_(2)CrO_(4) . The soda extract of A is acidified with diolute H_(2)SO_(4) , boiled to remove CO_(2) and treated with a freshly prepared solution of FeSO_(4) . concentratd H_(2)SO_(4) is added to the resulting solution. a brownn ring is formed at the junction of the two layers. Q. A solution of A, when treated with NH_(3) , gives:

CENGAGE CHEMISTRY ENGLISH-QUALITATIVE INORGANIC SALT ANALYSIS-Viva Voce Questions And Part-A (Analysis Of Anions)
  1. A gas evolved with effervescence on treating a salt with dil. HCl may ...

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  2. How will you distinguish between carbonate and bocarbonate ions?

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  3. How can sulphide ions be distinguished from sulphite ions?

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  4. How will you distinguish betweebn sulphate and thiosulphate ions?

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  5. How will you distinguish between sulphite and sulphate ions?

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  6. How can nitrite ion be distinguished from nitrate ion?

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  7. What is the formula of compound present in brown ring?

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  8. Why is a freshly prepared solution of FeSO(4) used for the detection o...

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  9. Why does only the organic layer assure colour and not the aqueous laye...

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  10. What happens when chloride, bromide and iodide are separately heated w...

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  11. How do you distinguish between Br^(ɵ) and NO(3)^(ɵ) ions?

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  12. Given salt is a bromide or iodide. How will you identify it by treatin...

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  13. Why does the chromyl chloride test fail with Br^(ɵ) and I^(ɵ)?

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  14. For testing SO(4)^(2-) with BaCl(2) solution why should sodium carbona...

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  15. Can lime water be employed for identification of CO(2) gas?

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  16. At times the solution of lime water appears milky. Comment.

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  17. Name the gas other than CO(2) which also turns lime water milky.

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  18. Why is it necessary to test for the acid radicals first (with dilute) ...

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  19. What is chromyl chloride test? Why is it so named?

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  20. Sodium carbonate extract is acidified with HNO(3) only in the identifi...

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