Options:
A.
B.
C.
D.
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Earlier discussion
3 older comments kept for context.
Aduragbemi
CuSO4 + NH3(ammonia)=Cu(NH3)²SO4
suleiman Yassi
D✅
Sharkorh kolzet
Cuso4with the small amount of NH4OH, blue precipitate of cupric hydroxide is obtained. Which is soluble in excess of NH4OH due to formation of soluble complex.
CuSO4 + 2NH4OH ——–> Cu(OH)2 [blue precipitate ]+(NH4)2SO4
Cu(OH)2 + 2NH4OH + (NH4)2SO4 ——>[ Cu(NH3)4 ]SO4 + 4H2O
Ammonia NH3 while ammonia solution is an aqueous form of ammonia when dissolved in water nh4oh
[Cu(NH3)4]SO4 is tetra amine copper (II) sulphate (Soluble blue complex).
ANSWER: D not B