[cu(nh3)4]2+ solutions exhibit a deep blue-violet color. how can you use spectrophotometry to confirm that this reaction has occurred and that the product formed is tetraamminecopper (ii) sulfate?

Analyzing the wavelength of maximum absorbance

Explanation:

Using spectrophotometry during the course of the reaction can confirm that the reaction took place.

The complex [Cu(NH₃)₄]²⁺ has a characteristic wavelength of maximum absorbance ( ), which can be looked up in literature. This characteristic λmax is different from the characteristic λmax of the reagents, as [Cu(NH₃)₄]²⁺ absorbs red-orange light and thus appears with a deep blue-violet color.

b. is the answer hoped i        

yes

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