A scientist feels a glass container with water and places in aquatic plant inside the container then close the lid and place a container in direct sunlight. The scientist observe small bumps on the surface of the plants leave on days, one and two, but no bubbles on day three at the scientist conclude, the bubbles were caused by photosynthesis, then which reactant should be added to the water in order for the bubbles to reappear.

Answer 1

Based on the given scenario, the reactant that should be added to the water in order for the bubbles to reappear is carbon dioxide (CO2). During photosynthesis, plants utilize water (H2O), carbon dioxide (CO2), and sunlight to produce oxygen (O2) and glucose (C6H12O6). The bubbles observed on days one and two were most likely oxygen bubbles released during the process of photosynthesis. On day three, the absence of bubbles indicates that either the supply of carbon dioxide has been depleted or there is insufficient light for photosynthesis to occur. Adding more carbon dioxide into the water would facilitate the process of photosynthesis, leading to the reappearance of bubbles.