Calculate the Debye length (1/k) of the double electric layer near the charged surface in KCl solutions of two concentrations c1 =0.01 M and c2= 0.1 M.
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Calculate the Debye length (1/k) of the double electric layer near the charged surface in KCl solutions of two concentrations c1 =0.01 M and c2= 0.1 M.
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- The conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm-1. Calculate its molar conductivity.The molar conductivity of a 1.5 M solution of an electrolyte is found to be 138.9 S cm2mol-1. Calculate the conductivity of the solution.At 298 K, the electrolytic conductivity of a 0.2 M KC1 solution is 2.50 X 10-2S cm-1. Calculate its molar conductivity.
- A conductivity cell has a resistance of 250 Ω when filled with 0.02 M KCl at 25°C and 105 Ω when filled with 6 x 10-5 M ammonium hydroxide solution. The conductivity of 0.02 M KCl solution at 25°C is 0.277 Sm-1, and the limiting molar ionic conductivities of NH4 + and OH- are 7.34 x 10-3 and 0.0198 S m2mol-1 , respectively. Calculate the cell constant and degree of dissociation of ammonium hydroxide in the 6 x 10-5 M solution.a) Calculate the normality and formality of a potassium permanganate solution of which 35.00 mL are equivalent to 0.2500 g of 98% pure calcium oxalate. b. How many microliters of a commercial hydrogen peroxide solution (assume the solution is approximately 3.5% w / v) will react with 35.00 mL of a solution whose formality was obtained in the previous part?Calculate the Debye length (1/k) of the double electric layer near the charged surface in KCl solutions of two concentrations c1 =0.01 M and c2= 0.1 M. Assume T= 300K, e = 80, k = 1.38 ·10-23 J/K, eo = 8.85 · 10-12 CV-1m-1 Tip: express concentrations as numbers of particles per liter (molarity×NA/L)
- (a) State Kohlrausch’s law of independent migration of ions. Mention one application of Kohlrausch’s law.(b) The resistance of a conductivity cell containing 10-3 M KC1 solution at 25 °C is1500 Q. What is the cell constant if conductivity of 10-3 M KC1 solution at 25 °C is 1.5 X 10-4 S cm-1?The conductivity of 0.20 M solution of KC1 at 298 K is 0.025 S cm-1. Calculate its molar conductivity.Calculate ionic strength and mean ionic activity coefficient of a 0.03 molal aqueous solution of sodium sulphate, Na2SO4.
- Estimate the vapour pressure of sea water at 20 °C given that the vapour pressure of pure water is 2.338 kPa at that temperature and the solute is largely Na+ and Cl- ions, each present at about 0.50 mol dm-3.What is the change in chemical potential of glucose when its concentration in water at 20.0 °c is changed from 0.10 mol dm-3 to 1.00 mol dm-3?Determine the % population in J=4 for HCl at 300 K. Brot = 10.595 cm-1, vvib = 2886 cm-1