**Equilibrium Constant and Reaction Quotient****Concept Overview:**At equilibrium, the concentrations of reactants and products can be predicted using the equilibrium constant, \( K_c \). This is a mathematical expression based on the chemical equation. For example, in the reaction:\[ aA + bB \rightleftharpoons cC + dD \]where \( a, b, c, \) and \( d \) are the stoichiometric coefficients, the equilibrium constant is defined as:\[ K_c = \frac{[C]^c[D]^d}{[A]^a[B]^b} \]where \([A], [B], [C],\) and \([D]\) are the equilibrium concentrations. If the reaction is not at equilibrium, the quantity can still be calculated, but it is called the reaction quotient, \( Q_c \), instead of the equilibrium constant, \( K_c \):\[ Q_c = \frac{[C]^c[D]^d}{[A]^a[B]^b} \]where each concentration is measured at some arbitrary time \( t \).---**Example Problem:****Part A**A mixture initially contains \( A, B, \) and \( C \) in the following concentrations: \([A] = 0.650 \, M\), \([B] = 0.650 \, M\), and \([C] = 0.350 \, M\). The following reaction occurs and equilibrium is established:\[ A + 2B \rightleftharpoons C \]At equilibrium, \([A] = 0.530 \, M\) and \([C] = 0.470 \, M\). Calculate the value of the equilibrium constant, \( K_c \).**Express your answer numerically.**- **Hints:** View Available Hint(s)- **Input Box** for \( K_c = \) [ ]- **Submit Button**- Message: "Incorrect; Try Again; 5 attempts remaining"---**Next Steps:**To continue to Part B, complete the previous part(s).

Answered: Image /qna-images/answer/4270a4ea-69d6-4ee1-b8c0-684735a15994.jpg

At equilibrium, the concentrations of reactants and products can be predicted using the equilibrium constant, Ke. which is a mathematical expression based on the chemical equation. For example, in the reaction aA + bB cC + dD where a, b, c, and d are the stoichiometric coefficients, the equilibrium constant is CD (AB Ke= where [A]. [B]. [C], and [D] are the equilibrium concentrations. If the reaction is not at equilibrium, the quantity can still be calculated, but it is called the reaction quotient, Qe. instead of the equilibrium constant, Ke. Qe ICD (A), "B where each concentration is measured at some arbitrary time t. Part A A mixture initially contains A, B. and C in the following concentrations: [A] = 0.650 M. [B] 0.650 M. and [C]=0.350 M. The following reaction occurs and equilibrium is established: A + 2B C At equilibrium, [A] = 0.530 M and [C] = 0.470 M. Calculate the value of the equilibrium constant. Ke Express your answer numerically. View Available Hint(s) K₂= Submit VD] ΑΣΦΑ 3 Previous Answers Part B Complete previous part(s) C X Incorrect; Try Again; 5 attempts remaining ?

At equilibrium, the concentrations of reactants and products can be predicted using the equilibrium constant, Ke. which is a mathematical expression based on the chemical equation. For example, in the reaction aA + bB cC + dD where a, b, c, and d are the stoichiometric coefficients, the equilibrium constant is CD (AB Ke= where [A]. [B]. [C], and [D] are the equilibrium concentrations. If the reaction is not at equilibrium, the quantity can still be calculated, but it is called the reaction quotient, Qe. instead of the equilibrium constant, Ke. Qe ICD (A), "B where each concentration is measured at some arbitrary time t. Part A A mixture initially contains A, B. and C in the following concentrations: [A] = 0.650 M. [B] 0.650 M. and [C]=0.350 M. The following reaction occurs and equilibrium is established: A + 2B C At equilibrium, [A] = 0.530 M and [C] = 0.470 M. Calculate the value of the equilibrium constant. Ke Express your answer numerically. View Available Hint(s) K₂= Submit VD] ΑΣΦΑ 3 Previous Answers Part B Complete previous part(s) C X Incorrect; Try Again; 5 attempts remaining ?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter12: Chemical Equilibrium

Section: Chapter Questions

Problem 113QRT

See similar textbooks

Similar questions

Describe a nonchemical system that is in equilibrium, and explain how the principles of equilibrium apply to the system.
Write the equilibrium constant expression for each reaction in terms of activities, simplifying where appropriate. a C(s)+O2(g)CO2(g) b P4(s)+5O2(g)P4O10(s) c 2HNO2(g)+3Cl2(g)2NCl3(g)+H2(g)+2O2(g)
Describe a nonchemical system that is not in equilibrium, and explain why equilibrium has not been achieved.
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?
5.22. True or false: If for a gas-phase reaction, then all equilibrium partial pressures of reactants and products must equal . Explain your choice.
In Section 17.3 of your text, it is mentioned that equilibrium is reached in a closed system. What is meant by the term “closed system,” and why is it necessary for a system to reach equilibrium? Explain why equilibrium is not reached in an open system.
The equilibrium constant for the butane iso-butane equilibrium at 25 C is 2.50. Calculate rG at this temperature in units of kJ/mol.
In Section 13.1 of your text, it is mentioned that equilibrium is reached in a closed system. What is meant by the term closed system. and why is it necessary to have a closed system in order for a system to reach equilibrium? Explain why equilibrium is not reached in an open system.
Methanol can be synthesized by means of the equilibriumreaction CO(g)+2H2(g)CH3OH(g) for which the equilibrium constant at 225°C is 6.08103. Assume that the ratio of the pressures of CO(g) and H2(g) is 1:2. What values should they have if the partial pressureof methanol is to be 0.500 atm?
For the given chemical equilibrium, these data are determined experimentally: T K 350K 3.76102 450K 1.86101 Determine H for this reaction.
. Many sugars undergo a process called mutarotation, in which the sugar molecules interconvert between two isomeric forms, finally reaching an equilibrium between them. This is true for the simple sugar glucose, C6H12O6, which exists in solution in isomeric forms called alpha-glucose and beta-glucose. If a solution of glucose at a certain temperature is analyzed, and it is found that the concentration of alpha-glucose is twice the concentration of beta-glucose, what is the value of K for the inter-conversion reaction?
Describe the establishment of equilibrium in a system represented by a shopper walking up the down escalator.