Question

Distinguish between zinc nitrate and lead nitrate using ammonium hydroxide solution

Answer 1

Zinc nitrate gives white ppt. which dissolves in excess ammonium hydroxide and produce a colorless solution whereas lead nitrate gives a chalky white ppt. of lead hydroxide which doesnot dissolve.

Answer 2

Answer:

You can mix in too much ammonium hydroxide solution to tell Lead nitrate solution from Zinc nitrate solution.

Explanation:

Distinguish between Zinc Nitrate and Lead Nitrate

Zinc Nitrate:

1. Ammonium hydroxide solution and zinc nitrate combine to generate a white precipitate. Excessive ammonium hydroxide dissolves this whitish precipitate.
2. Zinc nitrate is a crystalline (sand-like), colourless or white, odourless solid or flake. It is employed in liquid fertilizer as well as dyes as a catalyst and mordant.
3. Zinc hydroxide precipitates that are gelatinous and white occur when ammonium hydroxide is added.
4. $Zn(NO3)_{2} + 2NH_{4} OH - > Zn(OH)_{2} + 2NH_{4} NO_{3}$
5. The precipitates dissolve when too much ammonium hydroxide is added, generating a soluble complex.

Lead nitrate:

1. Ammonium hydroxide solution and lead nitrate combine to generate a white precipitate. Sufficient ammonium hydroxide doesn't really cause this white precipitate to disintegrate.
2. Zinc nitrate first generates a white precipitate that is soluble in excess ammonium hydroxide solution while lead nitrate produces an intractable white precipitate.
3. Chalky white precipitates of lead hydroxide are produced when ammonium hydroxide is added.
4. $Pb(NO_{3} )_{2} + 2NH_{4} OH - > Pb(OH)_{2} + 2NH_{4} NO_{3}$
5. When too much ammonium hydroxide is added, the precipitates don't dissolve.

#SPJ2