Describe what happens when 3.0 M NH₃ is slowly added to an aqueous solution of CuSO₄. A)A blue precipitate of Cu(OH)₂ forms. B)A royal blue complex of [Cu(NH₃)₄]²⁺ is formed. C)A blue precipitate of Cu(OH)₂ is formed which is then converted to the royal blue complex [Cu(NH₃)₄]²⁺. D)A royal blue complex of [Cu(NH₃)₄]²⁺ is formed which then is converted to a blue precipitate of Cu(OH)₂.

Question

Quizplus · Accepted Answer

When ammonia (NH3) is added to a solution containing copper ions, initially, a light blue precipitate of copper(II) hydroxide, Cu(OH)2, forms. Upon adding excess ammonia, this precipitate dissolves, forming a royal blue complex, [Cu(NH3)4(H2O)2]2+. This process describes the formation of a precipitate followed by its conversion into a complex ion in solution.

Describe What Happens When 3