230_Sp10_L19_post - CHEM 230 Sp10 Lecture 19 Chapter 9:...

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Unformatted text preview: CHEM 230 Sp10 Lecture 19 Chapter 9: Equlibrium wrap-up Chapter 10: Acids and Bases 1) Define 2) Strong and Weak Aqueous Acids 3) Strong and Weak Aqueous Bases Session ID 230 http://www.coolschool.ca/lor/CH12/unit2/U02L05.htm CO (g) + Cl 2(g) COCl 2(g) H < 0 Concept Question A solution of HNO 2 is at equilibrium: HNO 2(aq) + H 2 O (l) H 3 O + (aq) + NO 2- (aq) Water is added. After the water is added, is there any shift in the equilibrium? Select the correct statement. A) There is no shift.water is not part of the equilibrium expression. B) More reactants are formed because there is one reactant and two products in the equilibrium expression. C) More products will form because a reactant was added D) More products will form to counteract the increase in volume of the aqueous ions. Concept Question A solution of HNO 2 is at equilibrium: HNO 2(aq) + H 2 O (l) H 3 O + (aq) + NO 2- (aq) Water is added. After the water is added, is there any shift in the equilibrium? Select the correct statement. A) There is no shift.water is not part of the equilibrium expression. B) More reactants are formed because there is one reactant and two products in the equilibrium expression. C) More products will form because a reactant was added D) More products will form to counteract the increase in volume of the aqueous ions. K = n H 3 O + V " # $ % & n NO 2 ( V " # $ $ % & n HNO 2 V = n H 3 O + n NO 2 ( n HNO 2 V History of Acids and Bases Egyptians, Greeks, Romans: Acids: vinegar Alkali potash (K 2 CO 3 , wood) soda (Na 2 CO 3 , alkaline water) lime (CaO, shells) Middle Ages Acids aqua frotis (nitric acid HNO 3 ), aqua regia (a nitric-hydrochloric acid mixture HNO 3 /HCl) oil of vitriol (sulfuric acid H 2 SO 4 ) Otto Tachenius and Francois Sylvius (1670s)...
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This note was uploaded on 01/24/2012 for the course PCHEM 230 taught by Professor Gottfried during the Fall '11 term at University of Michigan.

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230_Sp10_L19_post - CHEM 230 Sp10 Lecture 19 Chapter 9:...

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