How To Make 3-3 Drops Of Tap Water

Obtain three test tubes and label each with the numbers 1, 2, and 3 with a glass-marking pen (preferably on a piece of masking tape) and place them in a test tube rack. Add a 0.5 cm cube of Beef liver into each tube (if not already prepared, use a scalpel or knife to cut your own pieces). Using a medicine dropper, add 3-4 drops of pH solution 2 for test tube 1, pH 7 for test tube 2, and pH 11 for test tube 3. Add a few drops of tap water for each tube.
Then, add 2-3 drops of hydrogen peroxide for each tube and wait for 5 minutes. Allow some time for the foaming reaction to occur and finish. Use a metric ruler to measure the thickness of the foam layer on the fluid surface of each test tube in millimeters (mm).
Record your results.