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NCSU CH 201 - RWW10 Equilibrium Problems

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12/14/2016 RWW10 Equilibrium Problemshttp://www.webassign.net/web/Student/AssignmentResponses/view_key?dep=14314091 1/4Current Score : – / 100 Due : Friday, October 14 2016 11:59 PM EDT1. –/9 pointsEqual numbers of moles of NH3 and O2 are added to a flask where they equilibrate by the reactionbelow. Indicate whether the equilibrium concentration of each compound in the left column of the tableis greater than (>), less than (<), equal to (=), or cannot be related to without more information (?)that of the compound in the right column.2NH3 + 3O2 N2O3 + 3H2O[NH3]>< = ?[H2O][NH3] >< =?[O2][N2O3]> < =?[H2O]RWW10 Equilibrium Problems (Homework)Paddy SheehanCH 201, section 002, Fall 2016Instructor: Robert WarrenWebAssignThe due date for this assignment is past. Your work can be viewed below, but no changes can be made.12/14/2016 RWW10 Equilibrium Problemshttp://www.webassign.net/web/Student/AssignmentResponses/view_key?dep=14314091 2/42. –/6 pointsHX is a weak acid that reacts with water according to the following equation:HX(aq) + H2O(l) H3O1+(aq) + X1(aq)Ka = 1.00e06What is the equilibrium concentration of hydronium ion in a solution that is 0.0881 M in HX and 0.210 Min X1 ion?[H3O1+] = (No Response) 4.20e07 M3. –/6 pointsWhat is the equilibrium concentration of Pb2+ ion in a solution of PbX2 that is 0.0920 M in X1 ion?PbX2(s) Pb2+(aq) + 2X1(aq)K = 5.01e06[Pb2+] = (No Response) 5.92e04 M4. –/22 points4.41 mol NH3 are placed in a 8.5 L flask and allowed to equilibrate at some temperature. At equilbrium,3.67 mol NH3 remain. Fill in the following reaction table in moles and determine the value of Kc at thistemperature. Hint: the c in Kc stands for concentration.2NH3(g) 3H2(g)+N2(g)initial(No Response) 4.41(No Response) 0(No Response) 0mol(No Response) 0.74(No Response) 1.11(No Response) 0.37molfinal(No Response) 3.67(No Response) 1.11(No Response) 0.37molKc = (No Response) 5.20e0412/14/2016 RWW10 Equilibrium Problemshttp://www.webassign.net/web/Student/AssignmentResponses/view_key?dep=14314091 3/45. –/11 pointsAt some temperature, K = 114 for the gas phase reactionH2 + F2 2HFWhat is the concentration of HF in an equilibrium mixture established by adding 3.40 mol each of H2 andF2 to a 1.00 L container at this temperature?[HF] = (No Response) 5.73 MWhat would be the equilibrium concentration of HF if 3.44 mol HF were removed from the aboveequilibrium mixture?[HF] = (No Response) 2.83 M6. –/6 pointsWhat is the equilibrium concentration of CN1 ion in a solution prepared by mixing 80.0 mL of 0.250 MHCN and 80.0 ml of 0.250 M NH3?NH3 + HCN CN1 + NH41+K = 0.710[CN1] = (No Response) 5.72e02 M7. –/10 pointsAn equilibrium mixture contains 0.940 mol HI, 0.320 mol I2, and 0.170 mol H2 in a 1.00L flask. What isthe equilibrium constant for the following reaction?2HI(g) H2(g) + I2(g)K = (No Response ) 0.0616How many moles of I2 must be removed in order to double the number of moles of H2 at equilibrium?(No Response) 0.425 mol I212/14/2016 RWW10 Equilibrium Problemshttp://www.webassign.net/web/Student/AssignmentResponses/view_key?dep=14314091 4/48. –/20 pointsConsider the following equilibrium:2NOBr(g) 2NO(g) + Br2(g)An equilibrium mixture is 0.107 M NOBr, 0.370 M NO, and 0.247 M Br2.a) What is the value of Kc at the temperature of the above concentrations?Kc = (No Response) 2.953 Mb) How many moles/liter of NOBr must be added to the above equilibrium mixture to produce anequilibrium mixture that is 0.356 M Br2?(No Response) 0.315 mol/L NOBr must be addedc) If the temperature is 370 K, what is the value of Kp?Kp = (No Response) 89.7 atmd) What is the value of Go at 370 K?Go = (No Response) 13.83 kJ9. –/10 pointsAt some temperature, K = 24.4 for the following reaction:H2(g) + CO2(g) H2O(g) + CO(g)The initial partial pressures of H2 and CO2 are each 3.90 atm.What is the final pressure of CO?PCO = (No Response) 3.24 atmWhat is the final total pressure?Ptotal = (No Response) 7.80


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