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18notesheet - Chapter 18 Chemical Equilibrium Define...

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Chapter 18 – Chemical Equilibrium Define chemical equilibrium: Define reversible reaction: Give some examples of reversible reactions: In a reversible reaction, if there is a higher concentration of products than reactants the reaction is favored or a reaction to the . In a reversible reaction, if there is a higher concentration of reactants than products the reaction is favored or a reaction to the . Define equilibrium constant: If the value of K is low, the are favored. Before equilibrium is established, the reaction occurs. If the value of K is high, the are favored. Before equilibrium is established, the reaction occurs. The value of K is dependent upon the of the system. Calculation: At 25 C, an equilibrium mixture of gases contain 6.4 x 10 -3 mol/L PCl 3 , 2.5 x 10 -2 mol/L Cl 2 and 4.0 x 10 -3 mol/L PCl 5 . What is the equilibrium constant for the following reaction? PCl 5 (g) PCl 3 (g) + Cl 2 (g) Shifting Equilbrium: In systems that have attained chemical equilibrium, the forward and reverse reactions occur at rates. Define LeChatelier’s Principle: Name 3 ways to apply stress to a system: 1. 2. 3. Lab #1-Effects of Concentration using Le Chatelier’s Principle Purpose: Observe shifts on equilibrium due to concentration changes using Le Chatelier’s Principle Materials: 0.1 M CuSO 4 , 1.0 M NH 3 , 1.0 M HCl, test tube Safety: Wear goggles, follow general safety guidelines Procedure: Observations 1. Place 20 drops of 0.1 M CuSO
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