PPT-Determining An Equilibrium Constant

Using Spectrophotometry and Beers Law Objectives 1 To determine the equilibrium constant for the reaction of iron III and thiocyanate to form the thiocyanatoironIII complex ion using spectrophotometric data. Reactions are reversible. A + B C + D ( forward). C + D A + B (reverse). Initially there is only A and B so only the forward reaction is possible. As C and D build up, the reverse reaction speeds up while the forward reaction slows down.. Dr. Ron Rusay. © Copyright 2003-2010 R.J. Rusay. Chemical Equilibrium. The reactions considered until now have had reactants react completely to form products. These reactions “went” only in one direction.. True. False. A constant . non-zero net . force on an object will cause its velocity to change.. True. False. A constant non-zero net force applied to an object initially at rest will cause the object to move with . Measuring Equilibrium Concentrations. Equilibrium Calculations (ICE Charts). Qualitatively Interpreting the Equilibrium Constant. Meaning of Small Equilibrium Constant. SCH4U – Grade 12 Chemistry, University Preparation. When given any number, there are rules that can be followed to determine how many digits within that number are “precision” digits, also known as Significant Figures.. Determining Sig Figs. Let’s look at the 5 rules of Sig Figs:. At equilibrium, the number of. people riding up the lift and the. number of people skiing down . the slope . are constant.. Learning Goal . Calculate the equilibrium constant for a reversible reaction given the concentrations of reactants and products at equilibrium.. Lecture 8. How do deal with individual ions in aqueous solution?. We can’t simply add Na. . to a solution (positive ions would repel each other).. We can add . NaCl. . How do we partition thermodynamic parameters between Na. E-mail: . benzene4president@gmail.com. Web-site: http://clas.sa.ucsb.edu/staff/terri/. Chemical Equilibrium – Ch. 6. 1. Consider the following reaction: . N. 2. (g) 3 . H. 2. (g) . ⇌ . EQUILIBRIUM. We have seen that objects in Physics fall into two categories: those that are . in equilibrium. , and those that are . not in equilibrium. .. EQUILIBRIUM. We have seen that objects in Physics fall into two categories: those that are in equilibrium, and those that are not in equilibrium. In statistical physics we deal with macroscopic systems. Is is technically impossible to work with standard physical states (microstates). Technically we have at disposition tremendously reduced information, just values of a few macroscopic quantities, which define the . . Scalars and vectors. . Types of forces. . Resultant of forces. . Equilibrium of particles. Scalar and Vectors. . Scalar - . a physical quantity that is completely described by a real number. . When the rates of the forward and reverse reactions become equal, the concentrations of the reactants and the products remain constant. This is the stage of chemical equilibrium. This equilibrium is . Read Chapter 13 look at the problems. Do . the AP practice test on page AP-13 A-D. (it is in between numbered pages 547-548). 2. AP Test. Historically, the first question on the free response has ALWAYS been an equilibrium question.. The Meaning of K. . K > 1 . . the equilibrium position is far to the right . K < 1 . . the equilibrium position is far to the left . The value of . K. for a system can be calculated from a known set of equilibrium concentrations. .