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Unformatted text preview: LAB 5 NOTE: These labs are known for high failure rates. Therefore, if I show an example using data, a graph, etc… yours may be totally different depending upon mine and yours success with the lab. So don’t freak if your data is completely different from mine. And therefore the analysis of results sometimes may need to be answered differently since you base your analysis off your data and not mine. DISCLAMIER: DO NOT CHEAT! Lab 5 Cellular Respiration Introduction Cellular respiration is the procedure of changing the chemical energy of organic molecules into a type that can be used by organisms. Glucose may be oxidized completely if an adequate amount of oxygen is present. Equation For Cellular Respiration C 6 H 12 O 6 + 6O 2-> 6CO 2 + 6H 2 O + energy Carbon dioxide is formed as oxygen is used. The pressure due to C02 might cancel out any change due to the consumption of oxygen. To get rid of this problem, a chemical will be added that will selectively take out C02. Potassium hydroxide will chemically react with carbon dioxide by the following equation: C0 2 + 2 KOH -> K 2 CO 3 + H 2 A respirometer is the system used to measure cellular respiration. Pressure changes in the respirometer are directly relative to a change in the amount of gas in the respirometer, as long as the volume and the temperature of the respirometer do not change. To judge the consumption of oxygen in two different respirometers you must reach equilibrium in both respirometers. A number of physical laws relating to gases are important to the understanding of how the equipment that you will use in this exercise works. The laws are summarized in general gas law that states: PV = nRT Where: P--the pressure of the gas V--the volume of the gas n--the number of molecules of gas...
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This note was uploaded on 08/23/2010 for the course CS 1371 taught by Professor Stallworth during the Spring '08 term at Georgia Institute of Technology.
- Spring '08