# Synthetic pathways to produce the provided complex

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1. Mar 23, 2017

### Faiq

• Please post this type of questions in HW section using the template.
Question
Describe the color changes that occur when $NH_{3(aq)}$ is gradually added, with stirring to $[CuCl_4]^{2-}_{(aq)}$ until the $NH_{3(aq)}$ is in excess.
Identify the three compounds or ions responsible for the new colors.

Now the marking scheme shows that somehow $[Cu(H_2O)_6]^{2+}_{(aq)}$,$Cu(OH)_{2(aq)}$ and $[Cu(NH_3)_4(H_2O)_2]^{2+}_{(aq)}$ gets produced.
The only reaction I am taught concerning $[CuCl_4]^{2-}_{(aq)}$ and $NH_{3(aq)}$ is
$[CuCl_4]^{2-}_{(aq)}$ + $NH_{3(aq)}$ (in excess) ----->$[Cu(NH_3)_4(H_2O)_2]^{2+}_{(aq)}$

Can someone tell me a reaction pathway in which all these three ions are achieved?

Last edited: Mar 23, 2017
2. Mar 28, 2017

### PF_Help_Bot

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