Why is ammonia added to copper sulphate solution in the colorometric determination of copper?
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The determination of copper is dependent upon the production of the intense blue color of the cupric ammonia complex when ammonia is added to the solution of a cupric salt. To produce the color system, 1 ml of 3M ammonium hydroxide was added to 10 ml of the standard copper solution, and thoroughly shaken . The absorbance was measured against a corresponding blank solution. ...
The determination of copper is dependent upon the production of the intense blue color of the cupric ammonia complex when ammonia is added to the solution of a cupric salt. To produce the color system, 1 ml of 3M ammonium hydroxide was added to 10 ml of the standard copper solution, and thoroughly shaken . The absorbance was measured against a corresponding blank solution. ...
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