Advertisements
Advertisements
प्रश्न
The solution of two electrolytes A and B are diluted. ^m of B increases 1.5 times while that of A increases 25 times. Which of the two is a strong electrolyte? Give a reason.
उत्तर
B is strong because on dilution ^m increases to a little extent.
APPEARS IN
संबंधित प्रश्न
State Kohlrausch law of independent migration of ions.
The conductivity of sodium chloride at 298 K has been determined at different concentrations and the results are given below:
Concentration/M | 0.001 | 0.010 | 0.020 | 0.050 | 0.100 |
102 × κ/S m−1 | 1.237 | 11.85 | 23.15 | 55.53 | 106.74 |
Calculate `∧_"m"`for all concentrations and draw a plot between `∧_"m"`and `"c"^(1/2)`. Find the value of `∧_"m"^0`.
The S.I. unit of cell constant for conductivity cell is __________.
In the plot of molar conductivity (∧m) vs square root of concentration (c1/2) following curves are obtained for two electrolytes A and B :
Answer the following:
(i) predict the nature of electrolytes A and B.
(ii) What happens on the extrapolation of ∧m to concentration approaching for electrolytes A and B?
Molar conductivity denoted by the symbol Λm is related to the conductivity of the solution by the equation (k is the conductivity and c is the concentration).
Assertion: Copper sulphate can be stored in zinc vessel.
Reason: Zinc is less reactive than copper.
The molar conductivity of 0.007 M acetic acid is 20 S cm2 mol−1. What is the dissociation constant of acetic acid? Choose the correct option.
`[(Λ_("H"^+)^ο = 350 "S" "cm"^2 "mol"^-1), (Λ_("CH"_3"COO"^-)^ο = 50 "S" "cm"^2 "mol"^-1)]`
The molar conductivity of CH3COOH at infinite dilution is 390 Scm2/mol. Using the graph and given information, the molar conductivity of CH3COOK will be:
Molar conductivity of substance “A” is 5.9 × 103 S/m and “B” is 1 × 10–16 S/m. Which of the two is most likely to be copper metal and why?
Discuss the variation of conductivity and molar conductivity with concentration.