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प्रश्न
How will you distinguish NH4OH solution from NaOH solution?
How will you differentiate between ammonium hydroxide and sodium hydroxide solution?
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उत्तर
NH4OH and NaOH can be distinguished by using calcium salts.
For example, when NaOH is added to Ca(NO3)2, Ca(OH)2 is obtained as a white precipitate that is sparingly soluble in excess of NaOH.
\[\ce{Ca(NO3)2 + 2NaOH → Ca(OH)2 + 2NaNO3}\]
When NH4OH is added to calcium salts, no precipitation of Ca(OH)2 occurs, even with an excess of NH4OH. This is because the concentration of OH−ions from the ionization of NH4OH is so low that it cannot precipitate the calcium hydroxide.
संबंधित प्रश्न
Choose the correct answer from the options given below:
A chloride which forms a precipitate that is soluble in excess of ammonium hydroxide is:
1) Calcium chloride
2) Ferrous chloride
3) Ferric chloride
4) Copper chloride
What happens when ammonia solution is added first dropwise and then in excess to the following solution:
FeCl3
Write a balanced equation for this reaction.
On adding dilute ammonia solution to a colourless solution of a salt, a white gelatinous precipitate appears. This precipitate however dissolves on addition of excess of ammonia solution. Identify (choose from Na, Al, Zn, Pb, Fe)
Which metal salt solution was used?
Name the metal hydroxides which are soluble in ammonium hydroxide solution.
Using ammonium hydroxide, how would you distinguish between the following pair of ions in solution?
Ferrous ion and Ferric ion.
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)
Write the observation for the following :
NH4OH is added first in a small quantity and then in excess to a solution of copper sulphate.
What do you observe when caustic soda solution is added to the following solution: first a little and then in excess:
CuSO4
Write a balanced equation for this reaction.
Write balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
