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The mean activity coefficient for an aqueous
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Chapter 8 Solutions
Physical Chemistry
- Consider the reaction of a 20.0 mL of 0.220 M C₅H₅NHCl (Ka = 5.9 x 10⁻⁶) with 12.0 mL of 0.219 M CsOH. Write the net ionic equation for the reaction that takes place. Be sure to include the proper phases for all species within the reaction.arrow_forwardPhysical Chemistry: Show complete solution. a) Find the equilibrium constant at 298.15 K for the reactionN2(g) + H2(g) ⇌ 2NH3(g), ΔG° = -32.734 kJ/mole b) Find the equilibrium composition (in terms of pressure) of a system originally consisting of 0.25 mol N2 and 0.75 mol H2 maintained at 298.15 K and 1 atm.arrow_forwardAt room temperature, the equation for Gibbs free energy change of an uncharged solute moving into the cell is this [C ] AG = 1.4 kcal/mol * log10 [C,] %3D Imagine that a concentration of an uncharged solute outside the cell is 1 M, and inside the cell 10 M. The movement of this solute into the cell will be Thermodynamically favorable (negative G) Thermodynamically unfavorable (positive G) Thermodynamically neutral (G = 0) %D O O Oarrow_forward
- When 14.3 g of a certain molecular compound X are dissolved in 85.0 g of benzene C6H6, the freezing point of the solution is measured to be 0.5 °C. Calculate the molar mass of X. molal freezing point depression constant (Kf)°C·kg·mol−1 of benzen is 5.07 If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits.arrow_forwardSelect the reaction for which K, = Kc. 2 Na,0,(s) + 2 CO,(g) =2 Na,CO3(s) + 0,(g) 2 KCIO3 (s) = 2 KCI(s) + 30,(g) 2 H,S(g) + SO,(g)= 3 S(s) + 2 H,O(g) Br, (g) + Cl,(g) 2 BRCI(g)arrow_forwardThe solubility of Mg(OH)2 in water at 25 °C is measured to be 0.0096 Round your answer to 2 significant digits. x10 X Ś Use this information to calculate K for Mg(OH)2. Larrow_forward
- › Calculate the value of the equilibrium constant, Kỵ, for the reaction Q(g) + X(g) — 2M(g) + N(g) given that Kc = M(g) — Z(g) 6R(g) 2 N(g) + 4 Z(g) 3 X(g) + 3 Q(g) = 9R(g) Kc1 = 3.48 Kc2 Kc3 = 0.587 = = 13.6arrow_forwardThe solubility of Ag₂CO3 in water at 25 °C is measured to be 0.035 L Round your answer to 2 significant digits. x10 X Ś Use this information to calculate K. sp for Ag₂ CO 3.arrow_forwardGiven that the vapor pressure of water is 17.54 Torr at 20 °C, calculate the vapor-pressure lowering, AP, of an aqueous solution that is 2.20 m in sucrose (C₁2H₂2O₁1). ΔΡ = Calculate the vapor-pressure lowering, AP, of an aqueous solution that is 2.20 m in calcium chloride. Assume 100% dissociation for electrolytes. ΔΡ 0.669 || 2.00 Incorrect Torr Torrarrow_forward
- a) From the solutions above which ones are exothermic and which oness are endothermic? And what are the signs of change in (ΔH) enthalphy? and which of the cases had no or very little change in temperature? b) Due to the spontaneously dissolving of the salts, what is the sign of the change in Gibbs free energy (ΔG) for each process?arrow_forward6 of 12 Part A I Review | Constants Periodic Table Determine the value of the equilibrium constant, Kgoal, for the reaction CO2(g) = C(s) + O2(g), Kgoal =? by making use of the following information: 1. 2CO2(g) + 2H2O(1) = CH;COOH(1) + 202(g), K = 5.40 x 10-16 2. 2H2 (g) + O2(g) = 2H,0(1), K2 1.06 x 1010 3. CH3COOH(1) = 2C(s) + 2H2(g) + O2(g), K3 = 2.68 x 10-9 Express your answer numerically. • View Available Hint(s) 中。 goal = 5:08 AM 19 3/1/2021arrow_forwardUsing the Kf value for water from your book, you prepare a solution at 25.0 °C from 9.17 molof some solid and 7.31 L of water (d = 0.997 g/mL), but you forgot the identity of the solid. Youknow it was either glucose, sodium acetate, sodium phosphate, or sodium sulfate. You decideto determine the mass indirectly by measuring the freezing point depression of the solution,and find that the solution has a freezing point of −7.02 °C. Which substance is it and how doyou know this?arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning