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

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.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.