Respuesta :
Answer:
The water should not be pink/purple because water should test negative for protein.
The water should actually have turned blue, because Biuret solution is blue.
Someone may have mislabeled the test tube with water
The water may have been contaminated with a protein.
Explanation:
To detect the presence of protein in a sample a test called biuret is performed. In this test peptide bonds present in the proteins are estimated with the help of a biuret solution.
Water sample indicating pink or purple colour is an error.
What is a biuret test?
- A test performed for estimating and analyzing proteins in a sample is called a biuret test. It uses a reagent called biuret that gets converted into pink or purple colour in the presence of proteins.
- The water sample does not contain proteins and therefore, should not give purple or pink colouration in the test.
The error was caused due to:
Mislabeling of samples or contamination of water with protein substances has caused the error.
Thus, water giving a positive test for biuret is an error due to wrong labelling or contamination.
Learn more about the biuret test here:
https://brainly.com/question/8293949
