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Le Chatelier's Principle

Q. You are interested in the following reaction: NH3(g) + HCl(g)  NH4Cl(s) If you run the reaction starting with ammonia and hydrogen chloride in a 2.00 L closed container at a constant temperature of 298 K, would you expect the pressure in the container to increase, decrease, or stay unchanged as the reaction proceeds? Defend your answer to get full credit. Molar Masses: NH3 = 17.03 g/mol, HCl = 36.46 g/mol, NH4Br = 53.49 g/mol

Solved • Apr 28, 2020

Le Chatelier's Principle

Q. Will the equilibrium shift to the products, reactants , or no change if solid NaC2H3O2 is added to the 1 L solution?

Solved • Apr 26, 2020

Le Chatelier's Principle

Q. The equilibrium constant, Kp, for the following reaction is 1.04×10-2 at 548 K. NH4Cl(s) NH3(g) + HCl(g) If ΔH° for this reaction is 268 kJ, what is the value of Kp at 626 K?

Solved • Apr 18, 2020

Le Chatelier's Principle

Q. The equilibrium constant, Kp, for the following reaction is 4.55×10-5 at 723 K. N2(g) + 3H2(g) 2NH3(g) If ΔH° for this reaction is -111 kJ, what is the value of Kp at 608 K?

Solved • Apr 18, 2020

Le Chatelier's Principle

Q. For the reaction: HNO2 + H2O <==> NO2- + H3O+ under certain conditions, when no NO2- is present initially, the percent dissociation at equilibrium is 2.7%. How will the percent dissociation at equilibrium change if sodium nitrite and nitrous acid are initially added to the solution (assume that the initial concentration of HNO2 is the same in both cases)? A. It will increase. B. It will decrease. C. It will remain the same because concentrations are always the same at equilibriu

Solved • Apr 14, 2020

Le Chatelier's Principle

Q. Consider the following aqueous equilibrium for a formic acid solution. Suppose solid sodium formate, NaHCOO, is added to the solution. Ignoring any changes in volume, which of the following statements regarding the resulting solution is not correct? A.The H+concentration decreases. B.The system shifts left to reestablish equilibrium. C.The HCOOH concentration increases. D.The value of Ka does not change.E.The pH decreases.

Solved • Apr 2, 2020

Le Chatelier's Principle

Q. Hydrogen sulfide (H2S) is a contaminant commonly found in natural gas. It is removed by reaction with oxygen to produce elemental sulfur. 2 H2S (g) + O2 (g) ⇌ 2 S (s) + 2 H2O (g). For each of the following scenarios, determine whether the equilibrium will shift to the right, shift to the left, or neither. Explain your answers. No credit will be given for just left or right! a. addition of H2S (g), b. removal of O2 (g), c. removal of H2O (g), addition of S(s) and addition of Ne(g).

Solved • Apr 2, 2020