Question

What is the experiment for iodine test on starch? Step by step.

Answer 1

Answer:

Explanation: SOLID SAMPLE :

1. Peel off the skin of any vegetables e.g. potato and fruits as these are often impermeable. Use a clean spatula to remove samples of powdered food. Avoid cross-contamination with other foods.

2. Add a few ( 2-3) drops of bench iodine solution potassium to a piece of solid food on a white tile.

3.Make observations.                                                  

                       LIQUID SAMPLE:

1. Add 10 cm3 of the liquid food sample to a clean, dry test tube.

2.Add about 5 drops of iodine solution to the test tube.

3.Note any colour changes.

4.To prepare a control, perform steps 1 -3 for de-ionized water.