CHEMISTRY:STRUC.+PROP.>CUSTOM<
19th Edition
ISBN: 9781323913451
Author: Tro
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 16E
In equilibrium problems involving equilibrium constants that are small to the initial concentrations of reactants, we often assume that the quantity x (which represents how far the reaction proceeds toward products) is small. When this assumption is made, we can ignore the quantity x when it is subtracted from a large number but not when it is multiplied by a large number. In other words,
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CHEMISTRY:STRUC.+PROP.>CUSTOM<
Ch. 15 - How does a developing fetus get oxygen in the...Ch. 15 - What is dynamic equilibrium? Why is it called...Ch. 15 - Give the general expression for the equilibrium...Ch. 15 - What is the significance of the equilibrium...Ch. 15 - What happens to the value of the equilibrium...Ch. 15 - If two reactions sum to an overall reaction, and...Ch. 15 - Explain the difference between Kcand Kp. For a...Ch. 15 - What units should you use when expressing...Ch. 15 - Why do we omit the concentrations of solids and...Ch. 15 - Does the value of the equilibrium constant depend...
Ch. 15 - Explain how you might deduce the equilibrium...Ch. 15 - What is the definition of the reaction quotient ()...Ch. 15 - What is the value of when each reactant and...Ch. 15 - Prob. 14ECh. 15 - Many equilibrium calculations involve finding the...Ch. 15 - In equilibrium problems involving equilibrium...Ch. 15 - What happens to a chemical system at equilibrium...Ch. 15 - What is the effect of a change in concentration of...Ch. 15 - What is the effect of a change in volume on a...Ch. 15 - What is the effect of temperature change on a...Ch. 15 - Write an expression for the equilibrium constant...Ch. 15 - Find and fix each mistake in the equilibrium...Ch. 15 - When the reaction comes to equilibrium, will the...Ch. 15 - Ethene (C2H4) can be halogenated by this reaction:...Ch. 15 - H2 and I2 are combined in a flask and allowed to...Ch. 15 - A chemist trying to synthesize a particular...Ch. 15 - This reaction has an equilibrium constant of...Ch. 15 - This reaction has an equilibrium constant of...Ch. 15 - Prob. 29ECh. 15 - Use the following reactions and their equilibrium...Ch. 15 - Calculate Kc for reaction a. I2(g)2I(g)Kp=6.261022...Ch. 15 - Calculate Kpfor each reaction. a. N2O4(g)2NO2(g)...Ch. 15 - Write an equilibrium expression for each chemical...Ch. 15 - Find and fix the mistake in the equilibrium...Ch. 15 - Consider the reaction: CO(g)+2H2(g)CH3OH(g) An...Ch. 15 - Consider the reaction: NH4HS(s)NH3(g)+H2S(g) An...Ch. 15 - Consider the reaction: N2(g)+3H2(g)2NH3(g)...Ch. 15 - Consider the reaction: H2(g)+I2(g)2HI(g) Complete...Ch. 15 - Consider the reaction: 2NO(g)+Br2(g)2NOBr(g)Kp=...Ch. 15 - Consider the reaction:...Ch. 15 - For the reaction A(g)2B(g) , a reaction vessel...Ch. 15 - For the reaction 2A(g)B(g)+2C(g) , a reaction...Ch. 15 - Consider the reaction:...Ch. 15 - Consider the reaction: SO2Cl2(g)SO2+Cl2(g) A...Ch. 15 - Consider the reaction: H2(g)+I2(g)2HI(g) A...Ch. 15 - Consider the reaction. CO(g)+2H2(g)CH3OH(g) A...Ch. 15 - Consider the reaction: NH4HS(s)NH3(g)+H2S(g) At a...Ch. 15 - Consider the reaction:...Ch. 15 - Silver sulfate dissolves in water according to the...Ch. 15 - Nitrogen dioxide reacts with itself according to...Ch. 15 - Consider the reaction and the associated...Ch. 15 - Consider the reaction and the associated...Ch. 15 - For the reaction Kc= 0.513 at 500K. N2O4(g)2NO2(g)...Ch. 15 - For the reaction, Kc= 255 at 1000 K...Ch. 15 - Consider the reaction: NiO(s)+CO(g)Ni(s)+CO2(g)...Ch. 15 - Consider the reaction: CO(g)+H2O(g)CO2(g)+H2(g)Kc=...Ch. 15 - Consider the reaction: HC 2 H 3 O 2 (aq)+ H 2 O(l)...Ch. 15 - Prob. 58ECh. 15 - Consider the reaction:...Ch. 15 - Consider the reaction:...Ch. 15 - Consider the reaction: A(g)B(g)+C(g) Find the...Ch. 15 - Consider the reaction: A(g)2B(g) Find the...Ch. 15 - Consider this reaction at equilibrium:...Ch. 15 - Consider this reaction at equilibrium:...Ch. 15 - Consider this reaction at equilibrium:...Ch. 15 - Prob. 66ECh. 15 - Each reaction is allowed to come to equilibrium,...Ch. 15 - Prob. 68ECh. 15 - This reaction is endothermic: C(s)+CO2(g)2CO(g)...Ch. 15 - This reaction is exothermic:...Ch. 15 - Coal, which is primarily carbon, can be converted...Ch. 15 - Coal can be used to generate hydrogen gas (a...Ch. 15 - Carbon monoxide replaces oxygen in oxygenated...Ch. 15 - Nitrogen monoxide is a pollutant in the lower...Ch. 15 - The reaction CO2(g)+C(s)2CO(g) has Kp= 5.78 at...Ch. 15 - A mixture of water and graphite is heated to 600...Ch. 15 - At 650 K, the reaction MgCO3(s)MgO(s)+CO2(g) has...Ch. 15 - A system at equilibrium contains I2(g) at a...Ch. 15 - Consider the exothermic reaction:...Ch. 15 - Consider the endothermic reaction:...Ch. 15 - Consider the reaction: H2(g)+I2(g)2HI(g) A...Ch. 15 - Prob. 82ECh. 15 - Prob. 83ECh. 15 - Prob. 84ECh. 15 - The system described by the reaction:...Ch. 15 - A reaction vessel at 27017°C contains a mixture of...Ch. 15 - At 70 K, CCl4 decomposes to carbon and chlorine....Ch. 15 - The equilibrium constant for the reaction...Ch. 15 - A sample of CaCO3(s) is introduced into a sealed...Ch. 15 - An equilibrium mixture contains N2O4, (P = O.28)...Ch. 15 - Carbon monoxide and chlorine gas react to form...Ch. 15 - Prob. 92ECh. 15 - Prob. 93ECh. 15 - Prob. 94ECh. 15 - Nitrogen monoxide reacts with chlorine gas...Ch. 15 - At a given temperature, a system containing O2(g)...Ch. 15 - A sample of pure NO2 is heated to 337 °C, at which...Ch. 15 - When N2O5(g) is heated, it dissociates into...Ch. 15 - A sample of SO3 is introduced into an evacuated...Ch. 15 - A reaction A(g)B(g) has an equilibrium constant of...Ch. 15 - The reaction A(g)2B(g) has an equilibrium constant...Ch. 15 - A particular reaction has an equilibrium constant...Ch. 15 - Consider the reaction: aA(g)bB(g) Each of the...Ch. 15 - Consider the simple one-step reaction: A(g)B(g)...Ch. 15 - Prob. 105ECh. 15 - Consider the reaction: N2(g)+3H2(g)2NH3(g). a....Ch. 15 - For the reaction AB , the ratio of products to...Ch. 15 - Solve each of the expressions for x using the...Ch. 15 - Have each group member explain to the group what...Ch. 15 - Prob. 110ECh. 15 - What is the correct expression for the equilibrium...Ch. 15 - Prob. 2SAQCh. 15 - Use the data below to find the equilibrium...Ch. 15 - The reaction shown here has a Kp = 4.5X102 AT 825...Ch. 15 - Consider the reaction between NO and Cl2 to form...Ch. 15 - Prob. 6SAQCh. 15 - Consider the reaction between iodine gas and...Ch. 15 - Prob. 8SAQCh. 15 - The decomposition of NH4HS is endothermic:...Ch. 15 - The solid XY decomposes into gaseous X and Y:...Ch. 15 - What is the effect of adding helium gas (at...Ch. 15 - Prob. 12SAQ
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- Kc = 5.6 1012 at 500 K for the dissociation of iodine molecules to iodine atoms. I2(g) 2 I(g) A mixture has [I2] = 0.020 mol/Land [I] = 2.0 108 mol/L. Is the reaction at equilibrium (at 500 K)? If not, which way must the reaction proceed to reach equilibrium?arrow_forwardBecause calcium carbonate is a sink for CO32- in a lake, the student in Exercise 12.39 decides to go a step further and examine the equilibrium between carbonate ion and CaCOj. The reaction is Ca2+(aq) + COj2_(aq) ** CaCO,(s) The equilibrium constant for this reaction is 2.1 X 10*. If the initial calcium ion concentration is 0.02 AI and the carbonate concentration is 0.03 AI, what are the equilibrium concentrations of the ions? A student is simulating the carbonic acid—hydrogen carbonate equilibrium in a lake: H2COj(aq) H+(aq) + HCO}‘(aq) K = 4.4 X 10"7 She starts with 0.1000 AI carbonic acid. What are the concentrations of all species at equilibrium?arrow_forwardAt room temperature, the equilibrium constant Kc for the reaction 2 NO(g) ⇌ N2(g) + O2(g) is 1.4 × 1030. Is this reaction product-favored or reactant-favored? Explain your answer. In the atmosphere at room temperature the concentration of N2 is 0.33 mol/L, and the concentration of O2 is about 25% of that value. Calculate the equilibrium concentration of NO in the atmosphere produced by the reaction of N2 and O2. How does this affect your answer to Question 11?arrow_forward
- The following two diagrams represent the composition of an equilibrium mixture for the reaction A2 + B2 2AB at two different temperatures. Based on the diagrams, is the chemical reaction endothermic or exothermic? Explain your answer using Le Chteliers principle. (A atoms are red and B atoms are green in the diagrams.)arrow_forwardFor the reaction N2(g)+3H2(g)2NH3(g) show that Kc = Kp(RT)2 Do not use the formula Kp = Kc(RT)5n given in the text. Start from the fact that Pi = [i]RT, where Pi is the partial pressure of substance i and [i] is its molar concentration. Substitute into Kc.arrow_forwardA solution is prepared by dissolving 0.050 mol of diiodocyclohexane, C5H10I2, in the solvent CCl4.The total solution volume is 1.00 L When the reaction C6H10I2 C6H10 + I2 has come to equilibrium at 35 C, the concentration of I2 is 0.035 mol/L. (a) What are the concentrations of C6H10I2 and C6H10 at equilibrium? (b) Calculate Kc, the equilibrium constant.arrow_forward
- Describe a nonchemical system that is in equilibrium, and explain how the principles of equilibrium apply to the system.arrow_forwardThe diagram represents an equilibrium mixture for the reaction N2(g) + O2(g) ⇌ 2 NO(g) Estimate the equilibrium constant.arrow_forwardHydrogen and carbon dioxide react at a high temperature to give water and carbon monoxide. H2(g) + CO2(g) H2O(g) + CO(g) (a) Laboratory measurements at 986 C show that there are 0.11 mol each of CO and H2O vapor and 0.087 mol each of H2 and CO2 at equilibrium in a 50.0-L container. Calculate the equilibrium constant for the reaction at 986 C. (b) Suppose 0.010 mol each of H2 and CO2 are placed in a 200.0-L container. When equilibrium is achieved at 986 C, what amounts of CO(g) and H2O(g), in moles, would be present? [Use the value of Kc from part (a).]arrow_forward
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