Analytical ChemistryHard
Question
When excess of dilute NH4OH is added to an aqueous solution of copper sulphate an intense blue colour is developed. This is due to the formation of :
Options
A.[Cu(NH3)6]2+
B.Cu(OH)2
C.[Cu(NH3)4]2+
D.(NH4)2SO4
Solution
Cu2+ + 4NH4OH → [Cu(NH3)4]2+ + 4H2O.
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