Question
Describe how to test for starch. __
Answer
4.1
(295 Votes)
Winifred
Veteran · Tutor for 10 years
Answer
Iodine solution
Explanation
## Step 1: To test for the presence of starch, you need to use a specific reagent known as iodine solution.## Step 2: Prepare the iodine solution by dissolving iodine in an aqueous solution, typically water or potassium iodide solution.## Step 3: Take a sample of the substance you want to test for starch. This could be a food item, plant material, or any other sample suspected of containing starch.## Step 4: Add a few drops of the iodine solution to the sample. ## Step 5: Observe the color change in the sample. If starch is present, the sample will turn a blue-black color. This color change occurs because iodine molecules fit into the helical structure of the starch polymer, creating a blue-black complex.#