What is the coordination entity formed when excess of liquid ammonia is added to an aqueous solution of copper sulphate?

Explanation

When excess of liquid ammonia is added to an aqueous solution of copper sulphate to give tetraamminecopper (II) sulphate
`underset(("Copper Sulphate"))(CuSO_(4)) + underset("(Ammonia)")(4NH_(3)) rarr underset(("tetramminecopper (II) Sulphate"))([Cu(NH_(3))_(4)] SO_(4))`
Therefore, the coordination entity is `[Cu(NH_(3))_(4)]^(2+)`