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प्रश्न
How will you distinguish between Ammonium hydroxide and Sodium hydroxide using copper sulphate solution?
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उत्तर
Ammonium hydroxide when added to copper sulphate drop-wise forms a pale blue ppt. of copper hydroxide which dissolves in excess of ammonium hydroxide to form a deep blue solution of tetrammine copper sulphate.
CuSO4 + 2NH4OH 
Cu OH2 + NH4 2SO4
pale blue ppt colourless in solution
With excess of NH OH ppt. dissolves
Cu OH2 + NH4 2SO4 + 2NH4OH |Cu NH3 4|SO4 + 4H2O
Tetrammine
Copper II sulphate
Sodium hydroxide when added to copper sulphate drop-wise forms a pale blue ppt. of copper hydroxide which is insoluble in excess of sodium hydroxide solution.
CuSO4 + 2NaOH Cu OH2 + Na2SO4
pale blue ppt colourless
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संबंधित प्रश्न
Name the metal hydroxides which are soluble in ammonium hydroxide solution.
Name the method used for preparation of the following salt from the list given below:
Zinc ion and Lead ion.
You are provided with PbCO3, ZnCO3 and CaCO3. How will you identify these cations?
Write the observation, and balanced equation for the following reaction:
Excess of ammonium hydroxide is added to a substance, obtained by adding hydrochloric acid to silver nitrate solution.
Choose the correct answer from the options given below :
A chloride which forms a precipitate that is soluble in excess of ammonium hydroxide is :
Distinguish between the given pair of compounds using the test given within brackets:
A lead salt and a zinc salt (using excess ammonium hydroxide)
State what do you observe when ammonium hydroxide to Iron (III) sulphate solution.
Write the observation for the following:
NaOH is added drop-wise till in excess to a solution of zinc sulphate.
Identify the cation of the following case:
NaOH solution when added to solution (C) gives white ppt. which insoluble in excess.
Write a balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
