Copper Sulphate Reacts With Ammonium
by Jerry Mason/science Photo Library
Title
Copper Sulphate Reacts With Ammonium
Artist
Jerry Mason/science Photo Library
Medium
Photograph - Photograph
Description
Reaction between copper(II) sulphate and ammonium hydroxide. In the test tube at left is a solution of copper(II) sulphate. When a small amount of ammonium hydroxide is added (centre) a precipitate of copper(II) hydroxide is formed. Adding more ammonium hydroxide dissolves the copper(II) hydroxide (right). This is thermodynamically unstable with respect to dehydration, so quickly forms copper(II) oxide. This is also soluble in ammonium hydroxide, so not precipitate forms, but a deep blue colour is seen in solution.
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September 16th, 2018
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