Chemistry
State why an aqueous solution of ammonia (NH4OH) is used for identifying cations.
Ammonia
22 Likes
Answer
The precipitate which are hydroxides of metallic radicals vary in :
- colour
- solubility in excess of NH4OH
Hence, ammonium hydroxide is used in qualitative analysis for identifying positive radicals or cations.
Answered By
12 Likes
Related Questions
State why the blue ppt. formed on addition of NH4OH to CuSO4 soln. dissolves to give a deep blue solution with excess of NH4OH. Give an equation for the reaction. State why Zn(OH)2 is soluble in excess of NH4OH.
Convert (i) ammonia (ii) ammonium hydroxide to an ammonium salt using (a) HNO3 (b) H2SO4
State a reason why reaction of liquor ammonia with nitric acid is a neutralization reaction.
State how NH4OH is used for identifying:
- Fe2+
- Fe3+
- Pb2+
- Zn2+
- Cu2+ cations.
Give also a balanced equation in each case for a known example.