- 3 A Describe The Nature Of Aluminium Oxide Film Formed On Aluminium If The Density Of Aluminium Is 2 7 Mg M And That 1 (77.67 KiB) Viewed 14 times
3 (a) Describe the nature of aluminium oxide film formed on aluminium if the density of aluminium is 2.7 mg/m³ and that of Al₂O3 is 4 mg/m³. Given the molecular weight of Al₂O3 101.96 and atomic weight of aluminium is 26.98. (b) Calculate the rate constant at 35°C for the hydrolysis of sucrose given that the rate constant is equal to 1.0x10³ L. mol-¹ s¹ at 37 °C. The E₁ =108 kJ/mol. (c) Given: Ca (HCO3)2 = 250 mg/L; Mg (HCO3)2 = 300 mg/L; CaSO4 = 180 mg/L; MgCl₂ = 95 mg/L; CaCl₂- 137 mg/L; turbidity - 15 mg/L; NaC1 - 58.5 mg/L. Calculate the cost of lime-soda process, if lime (95% pure) is Rs.200/10 Kg and soda (86% pure) is Rs. 400/10 Kg for softening of 150,000 liters of hard water using Al₂(SO4)3 as a coagulant @ 28.5 mg/L. (c) Batch adsorption of 1000 mg/L phenol was studied at 298 K using 50 mL aliquot at an optimized dose of 2 g of activated carbon. What is the adsorption capacity in mg/g at an equilibrium concentration of 500 mg/L? ---- -X