A reagent is a chemical substance that cause a chemical reaction or used to test the one. In the given activity, different reagents are used to predict the compound. Starch gives blue color on reaction with iodine, glucose will have brick red precipitate with Benedict solution, and proteins will have reddish brown color with Millon's reagent.
Why reagents are used to test compounds?
The reagents when combined with specific compounds performs specific reaction which helps to determine the presence of particular compound.
In the given activity,
- If in the first test, if the iodine turns color to blue this will indicate the presence of starch.
- In the second test, if on adding Benedict solution, brick red precipitates formed, this indicates the presence of glucose.
- In the third test, on adding Millon's reagent the protein in the solution will form reddish brown color.
Thus, these were some inferences that can be made from the given activities.
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