What\'s produced when NaHCO_3 is dissolved in water? Based on your answer to par

Question

What's produced when NaHCO_3 is dissolved in water? Based on your answer to part a, explain why you think NaHCO_3 is being used in our experiment. In our experiment, the leaf discs will float as a result of a gas that's produced by the (light reactions or Calvin cycle). Consider the process you selected in the previous question. Is CO_2 directly required for this process to occur? Based on your answers to parts a and b, you should be able to tell that CO_2 is not directly required for light reactions to occur. However, if CO_2 is removed from a plant cell's environment, the plant cell will eventually stop performing the light reactions (i.e. it will eventually stop producing oxygen gas). Explain why this is the case. Green pigments appear green because they (absorb or reflect) green light. Consider a green plant. It looks green because it is (using up or spitting out) any green light that it receives. Based on your answer to part b, you can predict that if a green plant receives only green light, it will grow (well or poorly).

Explanation / Answer

1. A) NaHCO3 + H2O ----> Na+ + OH- + H2CO3

B) sodium bicarbonate is being used in this experiment because the bicarbonate ion causes the leaf disks to sink by acting as a carbon source for photosynthesis.

2. A) The leaf discs will float as a result of gas produced by light reactions.

B) yes, CO2 is directly required for the leaf to sink in order to later check the buoyancy of the leaf.

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