38. Consider the following reaction:H2(3) + I(g) = 2 HI(g)Complete the table. Assume that all concentrations are equilib-rium concentrations in M.T(C)[H2][HI]Ke250.03550.03880.9223400.04550.3879.64450.04850.046850.2

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Answered: 38. Consider the following reaction:…

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter17: Equilibrium

Section: Chapter Questions

Problem 88AP: . Suppose K=4.5103at a certain temperature for the reaction PCl5(g)PCl3(g)+Cl2(g)If it is found that...

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. Suppose K=4.5103at a certain temperature for the reaction PCl5(g)PCl3(g)+Cl2(g)If it is found that the concentration of PCl5is twice the concentration of PCl3, what must be the concentration of Cl2under these conditions?
Consider the reaction A(g)+2B(g)C(g)+D(g) in a 1.0-L rigid flask. Answer the following questions for each situation (ad): i. Estimate a range (as, small as possible) for the requested substance. For example, [A] could be between 95 M and 100 M. ii. Explain how you decided on the limits for the estimated range. iii. Indicate what other information would enable you to narrow your estimated range. iv. Compare the estimated concentrations for a through d. and explain any differences. a. If at equilibrium [A]= 1 M. and then 1 mole of C is added, estimate the value for [A] once equilibrium is reestablished. b. If at equilibrium [B] = 1 M, and then 1 mole of C is added, estimate the value for [B] once equilibrium is reestablished. c. If at equilibrium [C] = 1 M, and then 1 mole of C is added, estimate the value for [C] once equilibrium is reestablished. d. If at equilibrium [D] = 1 M, and then 1 mole of C is added, estimate the value for [D] once equilibrium is reestablished.
At a certain temperature, K = 9.1 10-4 for the reaction FeSCN2+(aq)Fe3+(aq)+SCN(aq) Calculate the concentrations of Fe3+, SCN-, and FeSCN2+ in a solution that is initially 2.0 M FeSCN2+.
. Suppose that for the reaction 2N2O(g)+O2(g)4NO((g))it is determined, at a particular temperature, that the equilibrium concentrations arc [NO(g)]=0.00341M,[N2O(g)]=0.0293M, and [O2(g)]=0.0325M. Calculate the value of K for the reaction at this temperature.
How will an increase in temperature affect each of the following equilibria? How will a decrease in the volume of the reaction vessel affect each? (a) 2H2O(g)2H2(g)+O2(g)H=484kJ (b) N2(g)+3H2(g)2NH3(g)H=92.2kJ (c) 2Br(g)Br2(g)H=224kJ (d) H2(g)+I2(s)2HI(g)H=53kJ
Because carbonic acid undergoes a second ionization, the student in Exercise 12.39 is concerned that the hydrogen ion concentration she calculated is not correct. She looks up the equilibrium constant for the reaction HCO,-(aq) «=* H+(aq) + COf'(aq) Upon finding that the equilibrium constant for this reaction is 4.8 X 10“H, she decides that her answer in Exercise 12.39 is correct. Explain her reasoning. A student is simulating the carbonic acid—hydrogen carbonate equilibrium in a lake: H,CO,(aq) 5=6 H+(aq) + HCO,'(aq) K = 4.4 X 10'7She starts with 0.1000 A1 carbonic acid. W hat are the concentrations of all species at equilibrium?
. The equilibrium constant for the reaction 2NOCl(g)2NO(g)+Cl2(g)has the value 9.2106at a particular temperature. The system is analyzed at equilibrium, and it is found that the concentrations of NOCl(g) and NO(g) are 0.44 M and 1.5103M. respectively. What is the concentration of Cl2(g) in the equilibrium system under these conditions?
In the reaction in Exercise 12.33, another trial was carried out. The reaction began with an initial concentration of N2 equal to the initial concentration of NO. Each had a concentration of 0.100 mol L-1. WTat were the equilibrium concentrations of all species? The following reaction establishes equilibrium at 2000 K: N2(g) + O2(g) ^2 NO K = 4.1 X 10~4 If the reaction began with 0.100 mol L-1 of N2 and 0.100 mol L'1 ofO2, what were the equilibrium concentrations of all species?
In each of the reactions, how does the equilibrium respond to an increase in pressure? (a) 2SO 2 ( g )+ O 2 ( g ) 2SO 3 ( g ) (b) H 2 ( g )+ I 2 ( g )2HI( g ) (c) 3H 2 ( g )+ N 2 2NH 3 ( g )
Describe an experiment that would allow you to prove that the system 3 H2(g) + N2(g) 2 NH3(g) is a dynamic equilibrium. (Hint: Consider using a stable isotope such as 15N or 2H.)
. What does the activation energy for a reaction represent? How is the activation energy related to whether a collision between molecules is successful?
. Addition of an inert substance (one that does not participate in the reaction) does not change the _________ of an equilibrium.

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38. Consider the following reaction: H;(g) + Iz(g) =2HI(g) Complete the table. Assume that all concentrations are equilib- rium concentrations in M. T(C) [H2] (HI) 25 0.0355 0.0388 0.922 340 0.0455 0.387 9.6 445 0.0485 0.0468 50.2