Advertisements
Advertisements
Question
0.05 M NaOH solution offered a resistance of 31.6 Ω in a conductivity cell at 298 K. If the cell constant of the cell is 0.367 cm-1, calculate the molar conductivity of NaOH solution.
Advertisements
Solution
Given:
Cell constant (b) = 0.367 cm–1
Molar concentration (C) = 0.05 M NaOH
Resistance (R) = 31.6 Ω
To find: Molar conductivity (^)
Solution:
∧m(NaOH) = ?
`k_((NaOH)) = b/R_((NaOH)) = 0.01161 Ω^-1 cm^-1`
`∧_(m(NaOH)) = (k xx 1000)/C`
`= (0.01161 xx 1000)/0.05`
= 232.2 Ω-1 cm2 mol-1
Molar conductivity = ∧m = 232.2 Ω-1 cm2 mol-1
APPEARS IN
RELATED QUESTIONS
The molar conductivity of 0.05 M BaCl2 solution at 25° C is 223Ω-1 cm2 mol-1. What is its conductivity?
What is a cell constant? What are its units? How is it determined experimentally?
Answer the following in brief.
Explain the effect of dilution of the solution on conductivity.
Kohlrausch law is applicable for the solution _______.
In case of weak electrolyte the graph Λ vs `sqrt"c"` is _______.
The molar conductivity and conductivity of AgNO3 solution is 121.4 Ω–1 cm2 mol–1 and 2.428 × 10–3 Ω–1 cm–1 at 25 °C. What is molar concentration of AgNO3 solution?
Give SI unit of resistivity.
Write an equation that shows the relationship between molar conductivity and degree of dissociation of weak electrolyte.
Write three important steps required to determine molar conductivity.
If resistivity of 0.8 M KCI solution is 2.5 × 10-3 Ω cm. Calculate molar conductivity of solution?
The CORRECT unit of molar conductivity is ____________.
For the reaction \[\ce{A -> B}\], the rate increases by a factor of 2.25 when the concentration of A is increased by 1.5. What is the order of the reaction?
Which among the following solution has the highest conductivity (k) value?
Conductivity of KCI solution is 0.0027 Ω−1 m−1 at 25°C. The resistance of the solution is 82.4 Ω. The cell constant is ____________ m−1.
The SI unit of resistivity and molar conductivity are respectively ____________.
The molar conductivities at infinite dilution for sodium acetate, HCI and NaCl are 91 S cm2 mol-1, 425.9 S cm2 mol-1 and 126.4 S cm2 mol-1 respectively. The molar conductivity of acetic acid at infinite dilution is ______.
What is the common unit of conductivity if the dimensions are expressed in centimeter?
In 2 hours, a certain current liberates 0.504 g hydrogen. How many grams of copper can be deposited by the same current flowing for the same time in a CuSO4 solution?
(Molar mass of Cu = 63.5 g mol−1, H2 = 2.0 g mol−1)
Which of the following graph represents the variation of `∧` with `sqrt"c"` for acetic acid solution?
What is the relation between cell constant, conductivity and electrical resistance?
Conductivity of a conductor is ____________.
What is the unit of electrical conductance?
Calculate molar conductivity for 0.5 M BaCl2 if its conductivity at 298K is 0.01 Ω–1 cm–1.
A conductivity cell filled with 0.02 M AgNO3 gives at 25°C resistance of 947 ohms. If the cell constant is 2.3 cm-1, what is the molar conductivity of 0.02 M AgNO3 at 25°C?
Explain the determination of molar conductivity of a weak electrolyte at infinite dilution or zero concentration using Kohlrausch's law.
