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प्रश्न
Using sodium hydroxide solution, how will you distinguish: Zinc nitrate solution from calcium nitrate solution
How will you distinguish calcium nitrate and zinc nitrate solution?
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उत्तर १
Zinc nitrate solution from calcium nitrate solution :
(i) \[\ce{Zn(NO3) + 2NaOH -> Zn(OH)2 + 2NaNO3}\]
On further addition of NaOH, Zn(OH)2 dissolves.
(ii ) \[\ce{Ca(NO3)2 + 2NaOH -> Ca(OH)2 + 2NaNO3}\]
Ca(OH)2 precipitates are sparingly soluble in excess of sodium hydroxide.
उत्तर २
- Adding sodium hydroxide solution to zinc nitrate results in a white precipitate that is soluble in excess sodium hydroxide.
- Adding sodium hydroxide solution to calcium nitrate results in a white precipitate that is insoluble in excess of sodium hydroxide.
Notes
Students should refer to the answer according to their questions
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संबंधित प्रश्न
Distinguish by adding:
(a) sodium hydroxide solution and
(b) Ammonium hydroxide solution to
(i) Calcium salt solution and lead salt solution
(ii) Lead salt solution and ferrous salt solution
(iii) copper salt solution and ferrous salt solution
(iv) Fe (II) salt solution and Fe (III) Salt solution
(v) Ferrous nitrate and lead nitrate
Choose the correct answer from the options given below :
Hydroxide of this metal is soluble is sodium hydroxide solution
A white solid A when heated with sodium hydroxide solution, gives a pungent gas B, which turns red litmus blue. The solid, when dissolved in dilute nitric acid and treated with silver nitrate gives a white precipitate of C which is soluble in an ammonia solution.
Using Sodium hydroxide solution, how would you distinguish: Zinc nitrate solution from calcium nitrate solution.
Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride, and iron (III) sulphate. Copy the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble or insoluble) in (vi) to (x).
| Aqueous salt solution | Colour of precipitate when NaOH is added in a small quantity | Nature of precipitate (soluble or insoluble) when NaOH is added in excess |
| Copper (II) sulphate | (i) | (vi) |
| Zinc nitrate | (ii) | (vii) |
| Lead nitrate | (iii) | (viii) |
| Calcium chloride | (iv) | (ix) |
| Iron (III) Sulphate | (v) | (x) |
Sodium hydroxide solution is added to the solutions containing the ions mentioned in List X. List Y gives the details of the precipitate. Match the ions with their coloured precipitates.
| List X | List Y |
| (i) Pb2+ | (A) Reddish Brown |
| (ii) Fe2+ | (B) White insoluble inexcess |
| (iii) Zn2+ | (C) Dirty green |
| (iv) Fe3+ | (D) White soluble in excess |
| (v) Cu2+ | (E) White soluble in excess |
| (vi) Ca2+ | (F) Blue |
Write balanced equation reaction of sodium hydroxide solution with iron (III) chloride solution.
What is observed when hot, concentrated caustic soda solution is added to zinc? Write a balanced equation.
State one relevant observation for the following:
To the copper nitrate solution, initially, few drops of sodium hydroxide solution is added and then added in excess.
A student was asked to perform an experiment in the laboratory based on the instructions given:
Observe the picture given below and state one observation for the experiment you would notice on mixing the given solution.
