Question

What is the need of using sodium bicarbonate in o2 is produced during photosynthesis experiment

Answer 1

Fill the large container about ¾ full of room temperature dechlorinated water and add a few spoonfuls of the baking soda. Stir the solution until it is fully dissolved. This bicarbonate solution will provide the elodea with the carbon dioxide it needs to use photosynthesis

so , baking soda is a source of CO2 in the experiment for photosynthesis to occour and hence for the production of O2