271.The conductivity of 0.1 M KCl solution at 298 K is 0.0129 s cm–1. The resistance of this solution in a conductivity cell is found to be 58 ohms. What is the cell constant of the cell? The 0.1 M AgNO3 solution at 298 K in the same conductivity cell offered a resistance of 60.5 ohms. What is the conductivity of 0.1 M AgNO3 solution?
176 Views
272.Resistance of a conductivity cell filled with 0.1 M KCl solution is 100 £2. If the resistance of the same cell when filled with 0.02 M KCl solution is 520 Ω. Calculate the conductivity and molar conductivity of 0.02 M KC1 solution. The conductivity of 0.1 M KCl at 298 K is 0.0129 s cm–1.
608 Views
273.The electrical resistance of a column of 0.05 M NaOH solution of diameter 1 cm and length 50 cm is 5.55 x 103 ohm. Calculate its resistivity, conductivity and molar conductivity.
880 Views
274.250 cm3 solution containing 1 g of Ca(NO3)2 in conductivity cell offered a resistance of 48 ohms. The cell constant of conductivity of the solution is 0.56 cm-1. Find the molar conductivity.
116 Views
Advertisement
275.The conductivity of 0.00241 M acetic acid is 7.896 x 10–5 s cm–1. Calculate its molar conductivity and if Λ°m for acetic acid is 390.5 s cm2 mol–1, what is its dissociation constant?
157 Views
276.Λ°m for NaCl, HCl and CH3COONa are 126.4, 425.9 and 91.0 s cm2 mol–1respectively. Calculate Λ° for HAC.
261 Views
277.The specific conductance of a saturated solution of AgCl in water is 1.826 x 10–6ohm–1 cm–1 at 25°C. Calculate its solubility in water at 25°C. [Given Λ∞m (Ag+) = 61.92 ohm–1 cm2 mol–1 and Λ∞m (CI– ) = 76.34 ohm–1 cm2 mol–1]
1356 Views
278.Calculate the molar conductance at infinite dilution of ethanoic acid from the following data: Λ°m (HCl) = 425.9 s cm2 mol–1 Λ°m (CH3COONa) = 91.0s cm2 mol–1 Λ°m (NaCl) = 126.4 s cm2 mol–1
127 Views
Advertisement
Long Answer Type
279.Draw curves to show how the molar conductance of strong electrolytes varies with dilution.
458 Views
Short Answer Type
280.The molar conductivity of KCl solutions at different concentration at 298 K are given below:
C/mol L–1
Λ/s cm2 mol–1
0.000198
0.000309
0.000521
0.000989
148.61
148.29
147.81
147.09
Show that a plot between A and C1/2 is a straight line. Determine the values of Λ° and Λ for KCl.
Short Answer Type
Long Answer Type
