1. When the system A + B = C+D is at equilibrium, a. the sum of the concentrations of A and B must equal the sum of the concentrations of C and D. b. both the forward and the reverse reactions have stopped c. the forward reaction has stopped. d. the reverse reaction has stopped. 2. A large value of Kc as compared to Qc tells us which of the following? a. The reaction lies to the left b. The reaction lies in the middle c. The reaction lies to the right d. The reaction stops. 3. Write the mathematical expression for the reaction quotient, Qc, for this reaction: N2(g) 3H2(g) = 2NH3(g) a. Qc = [N2][H2]F/[NH3? b. Qc = [NH3]2/ [N2][H2]3

1. When the system A + B = C+D is at equilibrium, a. the sum of the concentrations of A and B must equal the sum of the concentrations of C and D. b. both the forward and the reverse reactions have stopped c. the forward reaction has stopped. d. the reverse reaction has stopped. 2. A large value of Kc as compared to Qc tells us which of the following? a. The reaction lies to the left b. The reaction lies in the middle c. The reaction lies to the right d. The reaction stops. 3. Write the mathematical expression for the reaction quotient, Qc, for this reaction: N2(g) 3H2(g) = 2NH3(g) a. Qc = [N2][H2]F/[NH3? b. Qc = [NH3]2/ [N2][H2]3

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

9. Nitrogen monoxide is formed in automobile exhaust by the reaction of N2 and O2 from air, and produced by the following reaction: N2(g) + O2(g) 2NO(g). The equilibrium constant for this reaction is 1.23 x 10-2 at 135°C. What is the direction of the reaction when a mixture that is 0.80 M N2, 0.60 M O2, and 0.10 M NO gets near equilibrium at 135°C?
68. Each reaction is allowed to come to equilibrium, and then the volume is changed as indicated. Predict the effect (shift right, shift left, or no effect) of the indicated volume change. a. CO(g) + H2O(g) = CO2(8) + H2(g) (volume is decreased) b. PC13(g) + Cl2(g) = PCI3(g) (volume is increased) c. CaCO3(s) = CaO(s) + CO2(g) (volume is increased)
Consider the equilibrium reaction. H₂(g) + 1₂(9) ⇒ 2 HI(g) In this case, 1.000 M H₂ reacts with 2.000 M of 1₂ at a temperature of 430.ºC. The value of K = 68. Determine the equilibrium concentrations of H₂, I₂, and HI. C M [H₂] [1₂] M [HI] M
If Q is the reaction quotient and K is the equilibrium constant, when the constant is at equilibrium what is true? A. Q<K B. Q^2=K C. Q>K D. K^2=QE. Q=K
At 35°C, K = 2.0 x 10-5 for the reaction 2 NOCI(g) = 2 NO(g)+ Cl2 (g) Calculate the concentrations of all species at equilibrium for each of the following original mixtures. a. 2.6 moles of pure NOCl in a 2.0-L flask [NOCI] M [NO] M %3D [Cl2] = M b. 1.0 mole of NOC1 and 1.0 mole of NO in a 1.0-L flask [NOCI] = M [NO] : M [Cl) ] M %3D С. 3.2 mole of NOCI and 1.0 mole of Cl2 in a 1.0-L flask [NOCI] M [NO] M %D [Cl2] M
Consider the reaction 2NO (g) + Cl2 (g) → 2NOCI (g), for which Kc = 6.50 × 104 at 35° C. If the starting concentrations of NO, Cl2 and NOCI are 3.60x103 M, 1.25 M and 5.87 M respectively, in which direction will the reaction proceed to reach equilibrium? a. Depends on the pressure Ob. To the right C. To the left d. The reaction is already at equilibrium
Given the equilibrium constant for this reaction: 4Cu(s) + O2(g) 2 Cu2O (s) K = 52.5 What is the value of K c for this reaction? Cu2O(s) 2 Cu (s) + 1/2 O2 (g) K = ? a. -52.5 b. 26.3 c. 0.14 d. 0.019
For the reaction 2SO2(g) + O2g) 2SO3(2) If K. = 4.3 x 10° and the following concentrations are present: [SO2] = 0.010 M, [SO3] = 10 M, [O2] = 0.01 M. Which of the following statements is correct? A. The system is at equilibrium B. The system is not at equilibrium and is shifting from left to right C. The system is not at equilibrium and is shifting from right to left D. There is not enough information E. The system is at equilibrium and is shifting from left to right 3.
64. Consider this reaction at equilibrium: 2 BRNO(g) = 2 NO(g) + Br2(8) Predict whether the reaction will shift left, shift right, or remain unchanged after each disturbance. a. NO is added to the reaction mixture. b. BINO is added to the reaction mixture. c. Brz is removed from the reaction mixture.
Consider the equilibrium reaction: Fe3+ + SCN1 [FeSCN2+]. The initial concentration of Fe3+ = 0.00200 M. The initial concentratin of SCN¹- = 0.00200 M. The equilibrium concentration of FeSCN2+ is 0.000583 M. What is the value of the equilibrium constant, Kc? Multiple Choice О О О О 345 146 290 686