Question

1) Write the mathematical expression for molar conductivity
2) What are the units of molar conductivity
m?
3) Conductivity of 0.002A1M acetic acid is 7.896 x 10 Scm, calculate its
molar conductivity in this solution
0) How does molar conductivity varies with concentration for strong as well
as weak electrolytes?
5) Give the graphical representation of variation of conductivity with
concentration for weak electrolytes?​

Answer 1

Answer:

1 Molar conductivity is defined as the conducting power of all the ions produced by dissolving one mole of an electrolyte in solution. ... Thus, Λ=κ×volumein cm3 containing 1 mole of electrolyte.

2 Molar conductivity has the SI unit S m2 mol−1. Older publications use the unit Ω−1 cm2 mol−1.

4. There is sharp increase in the number of ions in the solution. Hence, the molar conductivity of a weak electrolyte rises steeply at low concentration. (ii) Strong electrolytes: The molar conductivity of a strong electrolyte decreases slightly with the increase in concentration.

5.For weak electrolytes, the graph plotted between molar conductivity and c1/2 (where c is the concentration) is not a straight line. Weak electrolytes have lower molar conductivities and lower degree of dissociation at higher concentrations which increases steeply at lower concentrations.

Explanation:

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