Question

Multiple Choice Please write your name as it appears on UAOnline. Each question is worth 5 points each. Identify the choice or fill in the blank that best completes the statement or answers the question. Always show your work! 1. Write out equilibrium constant expression (K) for the following reaction: Co (CO),(s) 2Co (aq) + 300, (aq) 2. Calculate K, for the following reaction given the equilibrium concentrations of IPCI: [PCG) = 1.2 atm, and [Cl] = 0.30 atm. 0.90 atm, PCI,() PCI,() +CI,(8) a. K=2.5 b. K = 0.40 C. K= 3.6 d. Kp=0.23 3. Consider the reaction: PCI,(8) - PCI,(g) + CI, (g) The INITIAL concentration of PCs is 0.40 M and the EQUILIBRIUM concentration of PCI, is 0.33 M. Calculate the equilibrium constant Ke. 4. At 445°C, K. for the following reaction is 0.020. 2 HI(g) <-> H,(8) +1,9) A mixture of Ha, la, and Hl in a vessel at 445°C has the following concentrations: [HI] = 1.5 M, [H2) = 2.50 M and [1] -0.05 M. Which one of the following statements concerning the reaction quotient, Q., is TRUE for the above system? a. Qc = Kc; the system is at equilibrium. b. Qc is less than Kc; more H, and I will be produced. c. Qc is less than Kc; more HI will be produced. d. Qc is greater than Kc; more Hl will be produced.

please explain how you got your answers

Answer 1

27 3t Ca) 3 cos Cag) Co2(c ) 2 Co 2 aoca) Equibrium eonstant () 7 a coscos)s ) achvity of the ubstituents at equitien here 'a' terms are este corresponding here as co Cea olid its actvity 3 a cosCa) 2- K a X Cot (a)

pels () PCls9) C () Ky pasC, eg shere p'terms are the parhaf pressures Esubstituents of the correstording at equilibrium 2 x o.30 Kp O.90 O.40 Kp = 0.40 So, te corect option Pels () PCls (3) clz() nihial 0.40 M +0.33 M change,0.33 M +0.33 M 0.33 M O 33 M 0.07 M fque tebriuem Nouo, Ke o.33 x o.33 0.07 1.56

H2 C)1() 2 HI () -> Ke o.020 CHJ J Now 2 2.50 x O 05 1.5 0.083 So, 9c i6 areaterthan K and more be produced HI will d. So, correct option is