A chemist is studying the following equilibirum, which has the given equilibrium constant at a certain temperature: 2 CH,(g) = 3 H,(g) + C,H, (g) K, = 7, x 10-10 He fills a reaction vessel at this temperature with 13. atm of methane gas. Use this data to answer the questions in the table below. Can you predict the equilibrium pressure of H,, using only the tools Oyes available to you within ALEKS? O no If you said yes, then enter the equilibrium pressure of H, at right. Round your answer to 1 significant digit. O atm

A chemist is studying the following equilibirum, which has the given equilibrium constant at a certain temperature: 2 CH,(g) = 3 H,(g) + C,H, (g) K, = 7, x 10-10 He fills a reaction vessel at this temperature with 13. atm of methane gas. Use this data to answer the questions in the table below. Can you predict the equilibrium pressure of H,, using only the tools Oyes available to you within ALEKS? O no If you said yes, then enter the equilibrium pressure of H, at right. Round your answer to 1 significant digit. O atm

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 119AP

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Chemical Equilibrium II Magnesium hydroxide. Mg(OH)2, is a white, partially soluble solid that is used in many antacids. The chemical equation for the dissolving of Mg(OH)2(s) in water is Mg(OH)2(s)Mg2+(aq)+2OH(aq) a Describe a simple experimental procedure that you could use to study this solubility equilibrium. In your experiment, how would you determine when the solution process has attained equilibrium? b Write the equilibrium-constant expression for this dissolving of magnesium hydroxide. c Suppose equilibrium has been established in a container of magnesium hydroxide in water, and you decide to add more solid Mg(OH)2. What would you expect to observe? What effect will this addition of Mg(OH)2 have on the concentrations of Mg2+(aq) and OH(aq)? d Say you haw prepared an equilibrium solution of Mg(OH)2 by adding pure solid Mg(OH)2 to water. If you know the concentration of OH(aq), can you determine the concentration of Mg2+(aq)? If not, what information do you need that will allow you to determine the answer? e You slowly add OH from another source (say, NaOH) to an equilibrium mixture of Mg(OH)2 and water. How do you expect the concentration of the Mg2+(aq) to change? What might you be able to observe happening to the Mg(OH)2(s) as you add the OH? f Next you remove some, but not all, of the Mg(OH)2(s) from the mixture. How will this affect the concentrations of the Mg2+(aq) and OH(aq)? g If someone hands you a container of Mg(OH)2(aq) and there is no solid Mg(OH)2 present, is this solution at equilibrium? If it is not at equilibrium, what could you add to or remove from the container that would give an equilibrium system? h Consider an individual OH(aq) ion in an Mg(OH)2 solution at equilibrium. If you could follow this ion over a long period of time, would you expect it always to remain as an OH(aq) ion, or could it change in some way?
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