The+Experiment

**Materials:**
-Alka-seltzer tablets -Water -Vegetable Oil -Food Colouring

**Procedure:**
1) Gather at least 2 alka-seltzer tablets, 1/3 beaker full of water, ¼ beaker full of vegetable oil, and food colouring (any colour is fine) 2) Add about 5 drops of the food colouring to the beaker full of water 3) Obtain the beaker that is 1/3 full of water, and the beaker that is a ¼ full of vegetable oil. 4) Pour the vegetable oil into the water. You will notice that the two do not mix. 5) Now add the alka-seltzer tablets to the beaker, and it will create the effect of a lava lamp J

= Overall Observation: The effervescence is produced by the baking soda and citric acid reacting to form sodium citrate and carbon dioxide gas. =