Step-by-step explanation:
To test for the nutrients (fat, carbohydrates, and protein) in milk powder, you can perform the following tests:
1. Fat:
- Test: Use a solvent, such as ether or petroleum ether, to extract the fat from the milk powder.
- Result: After evaporating the solvent, you would expect to see a residue of fat remaining.
2. Carbohydrates:
- Test: Perform a colorimetric test, such as the Benedict's test or iodine test, to detect the presence of carbohydrates.
- Result: If carbohydrates are present, the solution would change color, indicating the presence of reducing sugars or starch.
3. Protein:
- Test: Perform a biuret test, which involves adding a solution of sodium hydroxide and copper sulfate to the milk powder.
- Result: If protein is present, the solution would turn from blue to purple, indicating the presence of peptide bonds.
By conducting these tests, you would expect to confirm the presence of fat, carbohydrates, and protein in the milk powder based on the respective positive results obtained from each test.