Physical Chemistry Answers

What are transference numbers and how are they related to ionic mobilities?

A conductivity cell having a cell constant of 0.5 cm^-1 filled with 0.02 M solution of KCl at 298 K gave a resistance of 20.2 Ω. The water used for preparing the solution had a conductivity of 7.1 × 10^–6 S cm^–1. Calculate the molar conductivity of 0.02 M KCl solution.

Differentiate between conductivity and molar conductivity of a solution

Draw the phase diagram for water system and label the one, two and three phase equilibria on it.

Give the significance of critical point in the phase diagram of water.

Solid ammonium chloride undergoes sublimation on heating. In the vapour phase ammonium chloride decomposes to give NH₄(g) and HCI(g). The following equilibrium is established.

NH₄Cl(s) ⇌ NH₃(g)+ HCl (g)

What is the number of

i) phases in the system,

ii) components in the system, and

iii) degrees of freedom of the system?

What is a phase? What is the maximum number of phases possible for a one-component system?

What is the critical solution temperature? Draw and explain the variation of mutual solubility of two liquids which exhibit upper CST.

How is the solubility of a gas affected by different factors? Explain.

Define the following terms

a) Molarity

b) Ideal solutions

c) Conjugate solutions

d) Metastable equilibrium

e) Condensed systems

f) Congruent melting point

g) Ionic mobility

h) Conductivity water

i) Standard electrode potential

j) Concentration cells