Post Lecture Homework Chapter 15 Equilibrium Constant and Reaction Quotient 12 o
ID: 715060 • Letter: P
Question
Post Lecture Homework Chapter 15 Equilibrium Constant and Reaction Quotient 12 of 24> Part A At equilibrium, the concentrations of reactants and products can be predicted using the squilibrium constant, Ke, which is a mathematical expression example, in the reaction = 0.650 M B = 1.35 M and C = 0.650 M The follo ing reaction occurs A mixture initially contains A and equilibrium is established: and in the folo ng concentrations: A based on the chemical equation. For At equilibrium, [A] = 0.490 M and [C] = 0.810 M . Calculate the value of the equilibrium constant, Ke Express your answer numerically. where a, b, c, and d are the stoichiometric coefficients, the equilibrium constant is View Available Hint(s) where [A], [B] [C], and [D are the equilibrium concentrations. If the reaction is not at equilibrium, the quantity can stil be calculated, but it is called the reaction quotient, Q, instead of the equilibrium constant, Ke Submit AltB where each concentration is measured at some arbitrary tme t Part B Complete previous part(s)Explanation / Answer
Given that initially
[A] = 0. 650M, [B] = 1.35 M, and [C] = 0.650 M.
At equilibrium, [A] = 0.490 M and [C] = 0.810 M. C
A + 2B < = > C
I 0.650 1.35 0.650
C -0.160 2(-1.60) +0.160
E 0.490 1.85 0.81
Kc = [C] / [A] [B]^2
= 0.81 / 0.490 * (1.85)^2
=0.81/ 0.490 *3.4225
= 0.48