Chapter 16 Acid Base - Review Problem Chapter 15 Review...

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Review Problem: Chapter 15 Review Problem: Chapter 15 For the equilibrium PCl 5 (g) PCl 3 (g) + Cl 2 (g), the equilibrium constant K eq has the value 0.497 at 500 K. A gas cylinder at 500 K is charged with PCl 5 (g) at an initial pressure of 1.66 atm. What are the equilibrium pressures of PCl 5 , PCl 3 , and Cl 2 at this temperature? Answers are 0.97, 0.693, and 0.693, respectively.
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Chapter 16 Chapter 16 Acid-Base Equilibria Acid-Base Equilibria CHEMISTRY The Central Science 9th Edition
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What Should You Understand? What Should You Understand? Acids and bases: What are they (example)?. What are their physical and chemical properties? How do they affect the rate of a reaction? How can they be quantified (i.e., expression of the concentration of an acid or base in a solution?
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Acids and Bases: Important in biological, industrial, reactions in the laboratory, etc. Acids taste sour and cause dyes to change color. Bases taste bitter and feel soapy . Arrhenius concept of acids and bases: Acids and Bases: A Brief Acids and Bases: A Brief Review Review
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A more general definition for acids and bases, based on the bronsted-Lowry concept, is that acid-base reactions involve proton transfer. Br Br ønsted-Lowry Acids and ønsted-Lowry Acids and Bases Bases
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+ - Proton Transfer Proton Transfer
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Whatever is left of the acid after the proton is donated is called its conjugate base . Similarly, whatever remains of the base after it accepts a proton is called a conjugate acid . Consider Conjugated Conjugated Acids and Acids and Bases Bases HA( aq ) + H 2 O( l ) H 3 O + ( aq ) + A - ( aq )
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Class Practice Problem Class Practice Problem What is the conjugated base of each of the following - 4 -2 2 3 -
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The stronger the acid, the weaker the conjugate base; the stronger the base, the weaker the conjugated acid. - Strengths of Strengths of Acids and Acids and Bases Bases
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Acids and Acids and Bases Bases
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Predicting Direction of Predicting Direction of Equilibrium Equilibrium Acid-base strengths allow us to predict in which direction equilibrium will lie (i.e., to the left or right) Example problem: Predict whether the equilibrium lies to the left or right for the reaction in sample exercise 16.3 using the previous table.
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