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- The mean activity coefficient of a 0.010 m H2SO4 solution is 0.544. What is its mean activity?The mean activity coefficient of a 0.2 b Mg (NO3)2 solution is 0.13 at 25oC. Calculate the mean molality, the mean ionic activity and the activity of the compound.The mean activity coefficient in an 0.050 molKg-1 LaCl3 (aq) solutions is 0.303 at 25 o C. What is the percentage error in the value predicted by the debye – Huckel limiting law?
- (a) Derive an expression for the ratio of solubilities of AgCI at two different temperatures; assume that the standard enthalpy of solution of AgCI is independent of temperature in the range of interest. (b) Do you expect the solubility of AgCI to increase or decrease as the temperature is raised?Estimate the mean ionic activity coefficient and activity of a solution that is 0.015 mol kg-1 MgF2(aq) and 0.025 mol kg-1 NaCI(aq).The mean activity coefficient of a 0.040 m H2SO4 solution is 0.354. What is its mean ionic activity? 4.0 .0089
- 3.) A solution contains NaCl and CaCl2 with the same concentrations. Which of the following is the ionic strength of the solution? A. 1c В. 2с С. Зс D. 4c E. 5c For items 4-6, refer to the following reaction: CH4 (g) + H20 (g) = CÓ (g) + 3H2 (g) 4. Which is the response of the equilibrium system if the pressure is increased? A. Shift towards the right B. Shift towards the left. C. There is no change in the equilibrium D. There is not enough information.What is the mean ionic activity coefficient for the ions M3+ and X1- of the ionic compound M1X3 if we could somehow magically know that y+ = 0.930 and y- = 0.473? %3D Type your answer...28. (a) Calculate the theoretical lattice energy for the salt CaF2. (b) The hydration enthalpy of Ca²+ is –1592 kJ mol-; the hydration enthalpy of F is -497 kJ mol-. Calculate the enthalpy of precipitation of CaF2. (c) Ignoring entropy effects, use the results of your calculations to predict whether CaF, is soluble or insoluble. Can entropy effects generally safely be ignored in questions like this?
- Formulate the expression for the chemical potential of the solvent in terms of the solute in a binary mixture using Gibbs-Duhem equation.Calculate the following: The vapor pressure of benezene, C6H6 at 25C in an ideal solution containing 1.66 mol of benezene and 0.313 of toulene. The vapor pressure of pure benezene is 96.0 torr.The equilibrium for the various proportions of the dissociation of the liquid solutions of amyl ester of dichloroacetic acid (CHCI,COOC,H,) into the acid (CHCI,COOH) and amylene (CH) was investigated. The initial amount for the CHCI,COOC.H, used is 1 mole. Completethe table below: Let b the initial moies of amylene. V the total volume of mixtures in Ilters, x be the number of moles of b V Kc 7.30 0.959 0.650 8.16 1.062 3.49 ester at equilbrlum and Kc equilbrium constant in moles per liter. 11.33 0.688 3.35 1.734 0.700 3.24