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Title: What is the effect of germinating seeds on the volume of gas in a controlled environment? Post by: irinaaa on Jan 11, 2017 oxygen consumption in cellular respiration.
When seeds germinate, they use cellular respiration to release stored chemical energy that will enable the growth of the seedling. As you have learned in previous science courses, oxygen is an important reactant in this process. In this activity you will investigate the level of cellular respiration of germinating seeds by measuring their oxygen use. Plants produce carbon dioxide as they respire. In order to keep the carbon dioxide from changing the volume of gas in the test tube, lime water is added. Lime water is a solution of calcium hydroxide, and it reacts with carbon dioxide to form the precipitate calcium carbonate. Ca(OH) 2 (aq) + CO 2 (g) → CaCO 3 (s) + H 2 O(l) Using lime water to absorb carbon dioxide gas restricts factors that may change the volume of the gas in the system to only changes associated with the concentration of oxygen. 1)what is the effect of germinating seeds on the volume of gas in a controlled enviroment? 2)prepare a table with suffiecient space to record respirometer data for two different types of seeds for 15 min. 3) what could be a possible source of erro in you procedure or data collection? 4) did the volume of gas in the test tube increase or decreae during this simulation.provide reasons for the change o volume of gas. 5)describe 2 changes to the design thta could improve this lab. |