How to make a ph rainbow

Materials

Take 3 ml of Universal Indicator.

Add the 3 ml into the test tube.

Take 20 ml of hydrochloric acid solution

Add the 20 ml into the test tube.

Take 6 ml of the sodium carbonate solution and add it to the bottom of the test tube.

Give the solution some time and slowly you will see the different colors forming in the test tube.