Biology 1441_045; TA Manish, October 14, 2014 Citric Acid originates from lemons or other fruits in which it is sour in taste. It is said that photosynthesis consumes CO2 when aerobic respiration also known as cellular respiration produces it. Also it states that whenever more carbon dioxide is produced the more acidic the water becomes. It is also said that the higher the light energy is meaning the sun, the more acidic the water will become as well. In this experiment it was figured out whether or not photosynthesis would affect the elodea plant when placed inside of a beaker …show more content…
Air was being blown into the water with a straw in order to contain CO2 The Elodea plants was placed in two different beakers that contained at least 50mL of water in one beaker, and ph 3 solution in the other. These two beakers were labeled as treatment one and two while there was one beaker with just water in it being the control. All three beakers were placed 30cm away from a lamp with a white light bulb and was exposed beneath the light for a total of 60 minutes.
Once the 60 minutes were up the Elodea plants were taken out of the two beakers that contained water and ph 3 acid solution. All three beakers were then placed on a white sheet of paper to be able to contrast the color better once three drops of phenolphthalein was added in the three beakers with a small dropper (Walsh MJ and Wostl RL. 2013). A bottle of NaOH 0.02 N with a dropper that held 0.05mL per drop had to be added to each beaker then stirred after each drop until it had held a permanent pink color (Walsh MJ and Wostl RL. 2013). Each drop that was counted was placed on the data sheet as results and each result was then converted into how much CO2 was produced within the …show more content…
It was stated by Schrock that plants in more acidic regions would photosynthesize less and that it would decrease also in oxygen production (Schrock et al. 2014).The effect of the citric acid not being able to make the plant photosynthesize could be because most plants are not able to tolerate in acidic waters (Anonymous, 2002). Some plants can die to due to it but unlike other plants it can tolerate acidic waters. For example plants such as Astilbe, Bergernia, and Bleeding Heart can tolerate under acidic waters because they need it to survive (Wetherbee, 2009). Unlike the elodea plant inside the beaker with just water it clearly showed that photosynthesis was working because carbon dioxide was produced and consumed efficiently. In future experiments other plants could definitely be tested in order to see if it will be able to photosynthesize with acidic water. Consider also that some plants can die easily under acidic