1 (a) Define the partial molar volume of the two components of a binary mixture, VA and VB. (4 marks) (b) Starting from

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1 A Define The Partial Molar Volume Of The Two Components Of A Binary Mixture Va And Vb 4 Marks B Starting From 1 (75.9 KiB) Viewed 34 times

1 (a) Define the partial molar volume of the two components of a binary mixture, VA and VB. (4 marks) (b) Starting from G = n₁ μ₁ + n₂ μ₂, derive the Gibbs-Duhem equation ₁μ₁ + n₂dµ₂=0 for a binary liquid mixture of ideal system at constant I and p. Where n₁ and n₂ are molar numbers of the two components 1 and 2, ₁ and ₂ are their chemical potentials. (6 marks) (c) Consider the dissociation of a weak acid HA of concentration c: HA(aq) + H₂O(1) H3O*(aq) + A¯(aq) c(1-α) ca ca (i) Express the degree of dissociation, a, of HA in terms of Am and Aºm of HA. (3 marks) (ii) Express the dissociation constant K₁ in terms of c, Am at c and Aºm. (3 marks) (iii) Rearrange the equation obtained in (ii) to obtain a linear equation and design an experiment to measure the K₂ and Aº m. (4 marks)