what is sodium bicarbonate used for in the photosynthesis lab
Leaf disks normally float, however when the air spaces are infiltrated with carbon dioxide, the. overall density of the lead disk increases and the leaf disk sinks. When sodium bicarbonate is added to the. water, the bicarbonate ion acts as a carbon source for photosynthesis causing the leaf disks to sink. As photosynthesis proceeds, oxygen is released into the interior of the leaf, which changes its buoyancy causing