: It is desired to use a conductance apparatus to measure the concentration of dilute solution of sodium chloride. If the electrodes in the cell are each 1 cm2 in area and are 0.2 cm. apart, calculate the resistance that will be obtained for, 1, 10, and 100 ppm NaCI(58.45) [UNa=5.192 *10-8 m²v's' , uc=7.913 *10 m²v's| at
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- Determine the transport numbers of the ions in an exactly 0.200 molal solution of copper (II) sulfate. The cell was filled with solution and electrolyzed between copper electrodes for some time. The cathode solution of the cell was found to weigh 36.434 g and contains 0.4415 g of Cu. Further the cathode in the coulometer showed an increase in weight of 0.0405 g due to deposited Ag.At 25 °C, 0.05 M of MgCl2 electrolyte solution showed molar conductivity of 194.2 S cm? mol-. A cell with electrodes that 1.50 cm² in surface area and 0.50 cm apart is filled with the above electrolyte. Determine the resistance of the solution.The resistance of 0.01M acetic acid solution is found to be 222002, when measured in a cellhas two electrodes of area of cross section 3.85cm² placed 10.5cm apart. Calculateconductivity.
- (25) With respect to the following unbalanced redox equation that takes place in basic solution: MnO₂ (s) + V2+ (aq) → VO3 (aq) + Mn²+ (aq) The stoichiometric coefficient on VO3 (aq) will be: (A) (B) (C) (D) (E) 12462 zirconium-95, and releThe 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)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: Normality 0.0005 0.0010 0.0020 0.0050 Resistance ( SI) 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 KCI solution is 0.00140877 $2¹cm-¹. Express your answer in four significant figures.
- A piece of an unknown weighing 12.50is placed in 49.7cm of water in a cylinder. The water level increases to 69.0cm3. whats the calculated value for the drnsity of the solid in g ml-1Calculate the equivalent conductance at each concentration of sodium iodide solution in the cell filled with 0.10 demal KCI solution at 18°C. The solution gave a resistance of 242ohms. Show sample computations. Normality 0.00025 0.0005 0.0010 0.0025 564.45 Resistance 5455 2747 1386 (b) Evaluate Ag by plottingThe electrometive force of the half cells at 2s čs -08V Ag / Ag Ag/ Ag Br -0.071V calculate: Solubility producct constant to silver bromide 2 O electromotive force Ag/AgBress/ HBr co.021)/Hefe atm}/ pt when the efficiency Coefficient to hydcogen bromide to the Celle o-9
- The electromotive force of the cell cd/ cdcla.2H20, sat. Solution /AgCI | Ag ot 25 is o.67533V and the temperature coufficient 6.5 x 101 K Calkulate the values : AG, AS -4 is and AH at 2si for the reaction cdcer) + 2 Ag CIcer.) = 2 Agcers + CdClz-2H20 ccr.)For the celle pt/ He cratmy / NaOH Cm)/ Hg0 cs) / Hg Eza8k c0.924V standard electromotive foree E Eng 0.854 V and 1) tatcutate sask write the electrods reaAions and the cett reaetion Sor ealculate the eleetromotive ferce at 308 K the Change in inthalpy (AH) = and, what happen to electromotive force when adoled few amount of nitrie acid to equitalent to the base NAOH partially? 298 K when -35 kcal Cell reachion toFor the reduction 2FeCl3 + SnCl2 =====➔ 2 FeCl2 + SnCl4 in aqueous solution the following data were obtained at 25oC t(min) 1 3 7 11 40 Y 0.01434 0.02664 0.03612 0.04102 0.05058 Where y is the amount of FeCl3 reacted in moles per liter. The initial concentrations of SnCl3 and FeCl3 were respectively, 0.03125, 0.0625 moles/L. a.)Show that the reaction is third order (derive the rate law), and b.) calculate the average specific rate constant.