At 25°C, a cell filled with 0.01 demal KCI solution gave a resistance of 484.02. The following data for NaCl solutions were then taken in the same cell at 25°C: Resistance ( Normality 0.0005 0.0010 0.0020 0.0050 10910 5494 2772 1129 Evaluate the equivalent conductance (in cm² 2-¹ mol-¹) of NaCl at the limit of infinite dilution. The specific conductance of a 0.01 demal KCl solution is 0.00140877 ¹cm-¹. Express your answer in four significant figures.

The mean activity coefficient of a 0.010 m H2SO4 solution is 0.544. What is its mean activity?

Consider the following cell. Pt | H2(1 bar) | HCI(m) | AgCI(s) | Ag At 25.0°C, the emf values at various molalities are given by the following. m/(mol-kg-1) 0.122 0.0548 0.0260 0.0136 0.00927 0.00553 0.00317 E/V 0.342 0.381 0.418 0.450 0.468 0.494 0.521 (a) Determine the value of E° graphically. Compare your value of E° with that listed in the table. E° from graph .2387 X V E° from table 4.0 .8 X V (b) Calculate the mean activity coefficient (Y+) for HCl at 0.122 m. (Use the E° value from the table.) 4.0 .0011

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Calculate the ionic strength of a solution that is 0.040 mol kg−1 in K3[Fe(CN)6](aq), 0.030 mol kg−1 in KCl(aq), and 0.050 mol kg−1 in NaBr(aq).

Required: Normality of Iodine

The cell constant of a conductance cell is 388.1 m-1. At 25oC the resistance of a 4.8 x 10-4 mol dm-3 aqueous solution of sodium chloride is 6.4 x 104  and that of a sample of water is 7.4 x 106 . Calculate the molar conductivity of the NaCl in solution at that concentration if the conductance of the NaCl solution is a sum of the conductance of NaCl and that of water

b) Determine the standard enthalpy change and std. Gibbs free energy change of reaction at 400 k for the reaction СO(g) +2H2(g) — CHОН (g) At 298.15 K, AH.co (0)= -26.41 kcal/mol, AH AG.co (9)= -32.8079 kcal/mol, AG cH,oh(9)= -38.69 kcal/mol, °.CH20H(9)= -48.08 kcal/mol, The standard heat capacity of various components is given by, CO = a + bT + cT² + dT³, where C, is in cal/mol-K and T is in K b x10² с х105 d x10° Соmponent CH3OH а 4.55 2.186 -0.291 -1.92 CO 6.726 0.04 0.1283 -0.5307 H2 6.952 -0.0457 0.09563 -0.2079

Calculate the cell potential at 25°C for the reaction Fe(s)|Fe^3+ (aq,0.0952 M)|| C12(g,7.62 atm) Cl-(aq,0.0577 M)|Pt(s). Eᵒcell= 1.396 V. 3 sig figs in answer.

The Nernst-Planck equation (shown below) describes the motion of a charged chemical species in a fluid. dC; z,FC; dv J; = - D; dx RT dx' What are the units for the ion flux J, where: zis the valence state of the ion (unitless) C is the concentration (mol/m³) Fis the Faraday constant (Coulomb/mol) Ris the ideal gas constant (kg m²/(s² mol °K)) Tis the temperature (K) dCi/dx is the concentration gradient (mol/m*) dV/dx is the electric potential gradient (V/m) D; is the diffusion coefficient (m²/s) Note that Coulomb is a unit of charge and V is volts where 1 V= 1 Joule/Coulomb)