Question

PDF Picture Picture Text CLB 10703 PHYSICAL CHEMISTRY.pdf x gallery pages.pdf WPS Cloud X (3 marks) At 373 Kelvin, the equillbrium constant Ka for the reaction below is 7.49 x 10 (b) soC a) SO (a)Cl2 () 4 Calculate K, for the reaction. (3 marks) At equilbrium, the partial pressure of So,C, was fournd to be 1.87 atm. Detemine the partial pressure of Cl, at the equilibrium. (4 marks) In phase equilibrium, the Gibbs Phase Rule equation plays an important role to (c) determine the degree of freedom for a system. Discuss the possibility for the equation to be modified if a system consists of two components. (4 marks) A basic buffer solution is prepared by using 0.134 M aqueous ammonium solution, NH, and solid ammonium chloride, NH,CI. Given the Ke for NH, is 1.8 x 10 Calculate percentage of ionization for the NH, solution used. (d) i. (2 marks) The 0.134 M NH, solution is known as a weak base. Justify this statement by providing the actual pH. (4 marks) If the buffer solution has a pH of 9.86, identify mass of solid NH,CI used to mix with 250 mL of the NH, solution. (molar mass of NH,CI= 53.5 g/mol) (5 marks) a

Answer 1

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0.033273M N 8hl hve 03327 53.5 0 Tm NY2ould hane 0.033275 x53. 5 4 0.4450 uned to mix wi 27 ml ManNH4 0.44 S0 CS Scanned wih CamScanner