Define the following terms:
(i) Abnormal molar mass
(ii) van’t Hoff factor
(i) Abnormal molar mass
(ii) van’t Hoff factor
(i) If the molar mass calculated by using any of the colligative properties to be different than theoretically expected molar mass.
(ii) Extent of dissociation or association or ratio of the observed colligative property to calculated colligative property.
(ii) Extent of dissociation or association or ratio of the observed colligative property to calculated colligative property.
Define the following terms :
(i) Mole fraction
(ii) Isotonic solutions
(iii) Van’t Hoff factor
(iv) Ideal solution
Calculate the degree of dissociation (α) of acetic acid if its molar conductivity (Λm) is 39.05 Scm² mol⁻¹. Given Λo(H⁺) = 349.6 Scm² mol⁻¹ and Λo(CH₃COO⁻) = 40.9 Scm² mol⁻¹..
Define the following terms :
(i) Fuel cell
(ii) Limiting molar conductivity Λom
What is meant by rate of a reaction ? Differentiate between average rate and instantaneous rate of a reaction.
There are two possible reactions for cathode in the electrolysis of aqueous
ZnCl2 :Zn2+ (aq) + 2e− → Zn(s) E0 = -0.76 V
2H2O (l) + 2e− → H2 (g) + 2OH− (aq) E0 = - 0.83 V
Which one will take place? Why?
What is meant by ‘disproportionation’ ? Give an example of a disproportionation reaction in aqueous solution.
What is meant by positive deviations from Raoult’s law ? Give an example. What is the sign of ΔmixH for positive deviation ?
