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प्रश्न
Using sodium hydroxide solution, how will you distinguish:
Iron (II) chloride from iron (III) chloride
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उत्तर
Iron (II) chloride from iron (III) chloride
(i) \[\ce{FeCl2 + 2NaOH -> Fe(OH)2 + 2NaCI}\]
Fe(OH)2 precipitates are dirty green gelatinous in nature.
(ii) \[\ce{FeCl3 + 3NaOH -> Fe(OH)3 + 3NaCI}\]
Fe(OH)3 precipitates are reddish brown in colour.
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संबंधित प्रश्न
Identify the substance underlined, in the following case:
Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide.
What do you observe when caustic soda solution is added to the following solution, first a little and then in excess:
FeCl3
Write a balanced equation for this reaction.
What do you observe when ammonium salt is heated with caustic soda solution?
Three test tubes contain calcium nitrate solution, zinc nitrate solution and lead nitrate solution.Describe the effect of Adding sodium hydroxide solution to each portion in turn till it is in excess.
Using Sodium hydroxide solution, how would you distinguish: Ammonium sulphate from sodium sulphate.
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) |
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.
What is observed when hot, concentrated caustic soda solution is added to aluminium? Write a balanced equation.
Name the metal hydroxides which are insoluble in caustic soda solution.
