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Zigmanuir [339]
3 years ago
5

Suppose that Biuret reagent turns purple when it is added to an unknown substance. What can you conclude about the substance?

Chemistry
1 answer:
Oksi-84 [34.3K]3 years ago
6 0

Answer:

the unknown substance is a protein

Explanation:

The biuret test is one of the tests for proteins. It  can be used to  detect peptide linkages. The biuret test is carried out in an alkaline solution. A coordination complex is formed  leading to the appearance of a  violet color.

Summarily, the biuret method is a colorimetric technique used to test for proteins and peptides.  It involves the formation of  a purple (violet) complex of Copper salts in alkaline solution.

Hence when the biuret reagent is added to an unknown substance and it turns purple, the unknown substance is a protein

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