12 14 2016 RWW10 Equilibrium Problems Paddy Sheehan CH 201 section 002 Fall 2016 Instructor Robert Warren WebAssign RWW10 Equilibrium Problems Homework Current Score 100 Due Friday October 14 2016 11 59 PM EDT The due date for this assignment is past Your work can be viewed below but no changes can be made 1 9 points Equal numbers of moles of NH3 and O2 are added to a flask where they equilibrate by the reaction below Indicate whether the equilibrium concentration of each compound in the left column of the table is 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 http www webassign net web Student Assignment Responses view key dep 14314091 1 4 12 14 2016 RWW10 Equilibrium Problems 2 6 points HX is a weak acid that reacts with water according to the following equation HX aq H2O l Ka 1 00e 06 H3O1 aq X1 aq What is the equilibrium concentration of hydronium ion in a solution that is 0 0881 M in HX and 0 210 M in X1 ion H3O1 No Response 4 20e 07 M 3 6 points What is the equilibrium concentration of Pb2 ion in a solution of PbX2 that is 0 0920 M in X1 ion Pb2 aq 2X1 aq PbX2 s Pb2 No Response K 5 01e 06 5 92e 04 M 4 22 points 4 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 this temperature Hint the c in Kc stands for concentration 2NH3 g initial 3H2 g No Response No Response 4 41 0 No Response No Response 0 74 final 1 11 No Response No Response 3 67 Kc No Response 1 11 N2 g No Response 0 No Response 0 37 No Response 0 37 mol mol mol 5 20e 04 http www webassign net web Student Assignment Responses view key dep 14314091 2 4 12 14 2016 RWW10 Equilibrium Problems 5 11 points At some temperature K 114 for the gas phase reaction H2 F2 2HF What is the concentration of HF in an equilibrium mixture established by adding 3 40 mol each of H2 and F2 to a 1 00 L container at this temperature HF No Response 5 73 M What would be the equilibrium concentration of HF if 3 44 mol HF were removed from the above equilibrium mixture HF No Response 2 83 M 6 6 points What is the equilibrium concentration of CN1 ion in a solution prepared by mixing 80 0 mL of 0 250 M HCN and 80 0 ml of 0 250 M NH3 NH3 HCN CN1 NH41 CN1 No Response K 0 710 5 72e 02 M 7 10 points An equilibrium mixture contains 0 940 mol HI 0 320 mol I2 and 0 170 mol H2 in a 1 00 L flask What is the equilibrium constant for the following reaction 2HI g H2 g I2 g K No Response 0 0616 How many moles of I2 must be removed in order to double the number of moles of H2 at equilibrium No Response 0 425 mol I2 http www webassign net web Student Assignment Responses view key dep 14314091 3 4 12 14 2016 RWW10 Equilibrium Problems 8 20 points Consider 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 M b How many moles liter of NOBr must be added to the above equilibrium mixture to produce an equilibrium mixture that is 0 356 M Br2 No Response 0 315 mol L NOBr must be added c If the temperature is 370 K what is the value of Kp Kp No Response d What is the value of 89 7 atm Go at 370 K Go No Response 13 83 kJ 9 10 points At 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 atm What is the final total pressure Ptotal No Response 7 80 atm http www webassign net web Student Assignment Responses view key dep 14314091 4 4
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