Le_Chateliers_Principle_and_Equilibrium_Lab_Assignment - Le Ch\u00e2telier's Principle and Equilibrium Lab Assignment Sayna Javanmardi Virtual High

Le_Chateliers_Principle_and_Equilibrium_Lab_Assignment - Le...

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Le Châtelier's Principle and Equilibrium Lab Assignment Sayna Javanmardi Virtual High School/Kells Academy Mr.James Mintz Chemistry SCH4U 01/27/2020 1. All cells of the body need oxygen. Haemoglobin is an oxygen-transporting protein that
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functions to provide oxygen to our cells. The haemoglobin-oxygen complex is an example of an equilibrium system. The equilibrium expression is given below: Hb ( aq ) + 4 O 2( g ) Hb( O 2 ) 4( aq ) a. In which direction will the equilibrium shift in the lungs where there is a high concentration of oxygen? When we breathe, oxygen enters the lungs, which means that the concentration of oxygen increases. When the blood comes in contact with oxygen, when the concentration of oxygen is high in the lungs, it bonds to hemoglobin, which means that the equation will shift to the right, which is the product. According to Le Châtelier's Principle, the system will shift away from the side where the addition occurred. Here oxygen, which is a reactant, is added. Therefore, the system will shift to the right to create more products, which is Hb( O2 )4(aq). b. How does this differ from the concentration of oxygen in cells in the rest of the body and in which direction will the system shift? Why? When hemoglobin circulates in the blood and goes to somatic cells, the oxygen of somatic cells has already depleted, which means it has been used. So, the concentration of oxygen which is bound to hemoglobin, is higher. Therefore, the equilibrium shifts to the left because the concentration of reactants is lower than
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the products. Because of the low concentration of oxygen, oxygen breaks free from the hemoglobin. When oxygen breaks this bond, it will be taken up by the cell. Cells receive oxygen from the blood because they need to increase their oxygen concentration. This concentration is in the lungs, which means the lungs have the most concentration of oxygen, and the cells need oxygen. Therefore, according to Le Châtelier's Principle, the system will shift away from the side that has more concentration, which is the product (Hb( O2 )4(aq) ) in here to the side that has less concentration which is the reactant side. Therefore, the system will shift to the right. 2. The carbonic acid-bicarbonate chemical buffering systems helps to maintain blood pH and is a good example of Le Châtelier's principle at work in the human body. The equilibrium equation is given below: H + ( aq ) + HCO 3 - ( aq ) ↔ H 2 CO 3( aq ) H 2 O ( l ) + CO 2( g ) a. Hyperventilating reduces the concentration of CO 2( g ) in the blood and results in dizziness. In which direction will the equilibrium shift in response? When the concentration of CO2(g) decreases, Hyperventilating happens. It means that the concentration of the product has decreased, and the body needs to produce more carbon dioxide. Therefore, the system should shift to the side that has lost carbon dioxide which is the right side. It means that due to the reason that the
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concentration of carbon dioxide has decreased and should increase, the system
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  • Fall '19
  • Chloride, Oxide

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