Advertisements
Advertisements
प्रश्न
How can you determine limiting molar conductivity, 0 m for strong electrolyte and weak electrolyte?
Advertisements
उत्तर
For strong electrolyte, plot of m
against c, extrapolated to the y-axis, gives the value of m for
strong electrolyte. For weak electrolyte, intercept is not obtained as o m
cannot be extra apolated to zero conc. hence limiting molar conductivity of weak electrolyte is obtained from that of strong electrolytes. Using Kohlrausch law of independent migration of ions.
`λ_m^0(CH_3COOH) = lamda^0CH_3COONa + lamda_{HCl}^circ - lamda_{NaCl}^circ`
`lamda_m^circ(CH_3COOH) = lamda_{CH_3COO-}^circ + lamda_{H^+}^circ`
APPEARS IN
संबंधित प्रश्न
Resistance of conductivity cell filled with 0.1 M KCl solution is 100 ohms. If the resistance of the same cell when filled with 0.02 M KCl solution is 520 ohms, calculate the conductivity and molar conductivity of 0.02 M KCl solution. [Given: Conductivity of 0.1 M KCl solution is 1.29 S m-1 .]
The molar conductivity of cation and anion of salt BA are 180 and 220 mhos respectively. The molar conductivity of salt BA at infinite dilution is_____________ .
(a) 90 mhos.cm2
(b) 110 mhos.cm2.mol-1
(c) 200 mhos.cm2.mol-1
(d) 400 mhos.cm2.mol-1
The conductivity of 0.001 mol L-1 solution of CH3COOH is 3.905× 10-5 S cm-1. Calculate its molar conductivity and degree of dissociation (α) Given λ°(H+)= 349.6 S cm2 mol-1 and λ°(CH3COO)= 40.9S cm2mol-1.
Conductivity of 0.00241 M acetic acid is 7.896 × 10−5 S cm−1. Calculate its molar conductivity and if `Lambda_m^0` for acetic acid is 390.5 S cm2 mol−1, what is its dissociation constant?
Write mathematical expression of molar conductivity of the given solution at infinite dilution.
Molar conductivity of ionic solution depends on:
(i) temperature.
(ii) distance between electrodes.
(iii) concentration of electrolytes in solution.
(iv) surface area of electrodes.
Write the cell reaction of a lead storage battery when it is discharged. How does the density of the electrolyte change when the battery is discharged?
Assertion: Copper sulphate can be stored in zinc vessel.
Reason: Zinc is less reactive than copper.
The variation of molar conductivity with concentration of an electrolyte (X) m aqueous solution is shown in the given figure.
The electrolyte X is ______.
Suggest a way to determine the \[\ce{\Lambda^{\circ}_m}\] value of water.
