20 Acid & Base Ionization Constants

20 Acid & Base Ionization Constants - Table 16.1 in the...

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1 1 Table 16.1 in the MSJ text shows that the auto-ionization equilibrium constant for water, K w , increases with increasing temperature. This fact reveals ____________________ when water auto-ionizes. A) that energy is released (exothermic) B) that energy is absorbed (endothermic) C) nothing about the change in energy 1 ln( ) o o H S K R T R   2 Why does K w increase and hence the pH of pure water decrease with increasing temperature? G o = -RT ln K G o = H o – T S o 1 ln( ) o o H S K R T R   As T increases, the first term becomes less important and ln(K) increases, so H o must be >0 .
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2 3 QRT Homework Ch. 16: 49, 51, 56, 58, 62,64 Midterm Exam 02 Thursday, March 27, 8:30 – 10:00 PM, Rooms TBA Material Study Priorities Lectures, Foundations of Chemistry, Quizzes, POGIL-IC, QRT Problems, Use textbook as a resource. Study Aids Sand Street Review Kinetics, Equilibrium, Acids & Bases QRT Solutions to Chapters 13, 14, and 16 In Closing sections at end of chapters Practice exam posted in Course Information on BB 4 What is meant by a strong acid and a strong base? A strong acid essentially ionizes completely in water to produce H 3 O + (aq) and other ionic species, e.g. HCl and HNO 3 . Some strong bases essentially dissociate
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This note was uploaded on 06/29/2008 for the course CHE 132 taught by Professor Hanson during the Spring '08 term at SUNY Stony Brook.

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20 Acid & Base Ionization Constants - Table 16.1 in the...

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