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Prepared by: C. Gireesha, Lecturer in Chemistry, UNIT - 2: SOLUTIONS, What is binary solution?, (J-14), Give an example for liquid solution in which solute is gas., (J-15), Ornamental gold containing copper is an example for what type of solution?, (M-16), Give an example for liquid solution in which solute is liquid. (M-17), In a binary solution, mole fraction of one component is 0.068. What is the mole fraction of another, component?, (M-18), 6. Define the term molarity., (M-14, M-16, J-14), 7. Define molality., (M-17, M-18, J-20), 8. Write the unit of molarity of the solution., (J-19), 9. How molarity does vary with temperature?, (M-17), 10. State Henry’s law .Write its mathematical form., (M-14,J-16, M-18, J-19, J-20), 11. At a given temperature and pressure and pressure nitrogen gas is more soluble in water than helium. Which, one of them has higher, value?, (M-15), 12. The KH values for Nitrogen gas (N2) at 293K and 303K are 76.48Kbar and 88.84Kbar respectively. Among, these two given temperatures, at which temperature Nitrogen gas is more soluble in water? (J-20), 13. Name the law behind the dissolution of CO2 gas in soft drinks under high pressure., (M-16), 14. Soda water bottles are sealed under high pressure. Give reason., (J-16), 15. At a given temperature, oxygen gas is more soluble in water than nitrogen gas. Which one of them has higher, value?, (J-19), 16. What happens to the solubility of a gas in a liquid with increase in temperature? Give reason. ( J-14, M-17), OR What is the effect of rise in temperature on the solubility of gases in liquids?, (J-16), OR How solubility of a gas in liquid changes with increase in temperature?, (J-19, M-20), How does solubility of a gas in liquid varies with i) Temperature and ii) Pressure?, (M-17), 17. State Raoult’s law for liquid mixtures., (M-16), OR State Raoult’s law of a binary solution for two volatile liquid components., (J-17), 18. What are ideal solutions?, (J-16), 19. Mention the enthalpy of mixing (, H) value to form an ideal solution., (M-14), 20. How does the volume change on mixing two volatile liquids to form an ideal solution?, (M-19), 21. Write any two properties of ideal solutions., (M-20), 22. What are non-ideal solutions? Mention the reason for the negative deviation from the Raoult’s law. (M-16), 23. On mixing equal volume of acetone & ethanol, which type of deviation from Raoult’s law is expected? (M-15), 24. 10mL of liquid ‘A’ is mixed with 10mL of liquid ‘B’, the volume of the resultant solution is 19.9mL. What, type of deviation expected from Raoult’s law?, (M-17,20), 25. What type of deviation from Raoult’s law is expected?, i), When equal volume of acetone and ethanol is mixed?, ii), When equal volume of acetone and chloroform is mixed?, (M17), 26. A mixture of chloroform and acetone forms a solution with negative deviation from Raoult’s law. Give, reason., (M-17), 1., 2., 3., 4., 5., , 27., 28., 29., 30., 31., 32., 33., , Write (Mention) the differences between ideal and non-ideal solutions., (J-15, M-16, M-18), What are azeotropes? Give an example for binary solutions showing minimum boiling azeotropes. (M-20), 95% aqueous ethanol cannot be concentrated further by fractional distillation. Give reason., (M-20), On what factor the value of colligative property depends?, (J-15), Define Osmotic pressure., (M-18), What is Reverse osmosis? Mention its use., (M-19), OR What is Reverse osmosis? Mention its one practical utility., (J-17), 1, SOLUTIONS, Government PU College (UU0038), Huliyar-Kenkere, Chikkanayakanahalli Taluk, Tumkur District-572218
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Prepared by: C. Gireesha, Lecturer in Chemistry, 34. Name the phenomenon used in desalination of sea water., 35. Define isotonic solution. What happens when the blood cell is dipped in a solution containing more than, 36., 37., 38., 39., 40., , 1., 2., , 3., 4., , 5., , normal saline concentration?, (M-15, M-18), How does the size of blood cells change when placed in an aqueous solution containing more than 0.9%, (m/v) sodium chloride?, (M-19), Van’t Hoff factor for a solution is more than one. What is the conclusion drawn from it?, (J-17), Van’t Hoff factor for a solution is less than one. What is the conclusion drawn from it?, (M-18), What is the value of Van’t Hoff factor for weak acid which undergoes association in aqueous solution?, What is the value of Van’t Hoff factor ‘i’ for complete dissociation of potassium sulphate (K2SO4) in a very, dilute solution?, (M-17, M-20), ********, On dissolving 2.34g of solute in 40g of benzene, the boiling point of solution was higher than that of benzene, by 0.81K. Kb value for benzene is 2.53Kkg, .Calculate the molar mass of the solute. (M-14), The vapour pressure of pure benzene at a certain temperature is 0.850bars. A non-volatile solid weighing, 0.5g when added to 39g of benzene (Molar mass 78g), vapour pressure of the solution then is 0.845bars., What is the molar mass of the solid substance?, (J-14, 17, MQP ), A solution containing 18g of non-volatile solute is dissolved in 200g of water freezes at 272.07K., Calculate the molar mass of solute. Given: Kf =1.386KKg, , freezing point of water =273K (M-15 ), The boiling point of benzene is 353.23K.When 1.80g of a non-volatile solute was dissolved in 90g Of, benzene, the boiling point is raised to 354.11K. Calculate molar mass of the solute. Given Kb for benzene is, 2.53K kg, (J-15 , MQP ), 5.8g of a non-volatile solute was dissolved in 100g of carbon disulphide (CS2). The vapour pressure of the, solution was found to be 190 mm of Hg. Calculate the molar mass of solute. Given the vapour pressure of, CS2 is 195 mm of Hg [ Molar mass of CS2 = 76g, ], (M-16 , J-18 , MQP ), , 6., , 300cm3 of an aqueous solution of protein contains 2.12 g of the protein, the osmotic pressure of such solution at, 300K is found to be 3.89 x, bar. Calculate the molar mass of protein. (R= 0.0823Lbar, ), (J-16), , 7., , 1.00 g of a non-electrolyte solute dissolved in 50g of benzene lowered the freezing point of benzene by, 0.40K.The freezing point depression constant of benzene is 5.12 K kg, . Find the molar mass of solute., (M-17, J-20), The boiling point of benzene is 353.23K. When 1.80g of a non-volatile, non-ionisable solute was dissolved, in 90g of benzene, the boiling point raised to 354.11K. Calculate molar mass of solute. [Give, for benzene, = 2.53 K kg, ], (M-18, MQP), 31g of an unknown molecular material is dissolved in 500g of water.The resulting solution freezes at 271.14K., Calculate the molar mass of the material.(Given: Kf for water = 1.86 Kkgmol-1,, of water = 273K) (M-19), The vapour pressure of benzene at a certain temperature is 200 mm/Hg. At the same temperature, the vapour, pressure of a solution containing 2g of a non-volatile solid in 78g of benzene is 195mm/Hg. What is the, molar mass of solute?, (MQP), A solution is prepared by dissolving 0.5g of polymer of molar mass 185,000 in 200mL of water at 37 oC., Calculate the osmotic pressure in Pascal’s. Given R=8.314 PaL, (MQP), The vapour pressure of benzene at a certain temperature is 200 mm/Hg. At the same temperature, the vapour, pressure of a solution containing 2g of a non-volatile solid in 78g of benzene is 195mm/Hg. What is the, molar mass of solute?, (MQP), A solution is prepared by dissolving 0.5g of polymer of molar mass 185,000 in 200mL of water at 37 oC., Calculate the osmotic pressure in Pascal. Given R=8.314 Pa L, (MQP), Vapour pressure of liquids A & B at 298 K is 300 mm of Hg & 450 mm of Hg respectively. If the total, vapours pressure of a mixture of A& B is 405 mm of Hg. Calculate the mole fraction of A in the mixture., A 4% solution of a non-volatile solute is isotonic with 0.702% urea solution. Calculate the molar mass of, the non-volatile solute. (Molar mass of urea = 60gmol -1), (MQP), , 8., , 9., , 10., , 11., 12., , 13., 14., 15., , 2, SOLUTIONS, Government PU College (UU0038), Huliyar-Kenkere, Chikkanayakanahalli Taluk, Tumkur District-572218
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16., , 17., 18., , 19., 20., , 21., 22., , Prepared by: C. Gireesha, Lecturer in Chemistry, Acetone boils at 56.38oC and a solution of 1.41g of an organic compound in 20 g of acetone boils at, 56.88oC. Calculate the molar mass of the organic compound (Given Kb for acetone =1.67Kkgmol-1). (MQP), Calculate the osmotic pressure of 0.05% urea solution in water at 20oC. Given R =0.0821Latm mol-1K-1., Molar mass of urea = 60gmol-1, (MQP), The boiling point of benzene is 353.23K. when 1.80g of a non volatile, non-electrolytic solute was dissolved, in 90g of benzene , the boiling point was raised to 354.11K calculate the molar mass of the solute [Kb for, benzene =2.53Kkgmol-1), (MQP), Calculate the mole fraction of CO2 in one liter of soda water sealed under a pressure of 3.5bar at 298K., KH = 1.67 X, bar, (MQP), 24g of non-volatile, non-electrolyte solute is added to 600g of water. The boiling point of the resulting, solution is 373.35K. Calculate the molar mass of the solute. Give boiling point of pure water = 373K and kb, for water =0.52Kkg mol-1., (MQP), 18g of glucose is dissolved in 1000g of water at 300K.At what temperature does this solution boil? (Given:, kb for water = 0.52Kkgmol-1 & boiling for water = 273.15K)., (MQP), If 1.71g of sugar (Molar mass of sugar= 342) is dissolved in 500, of a solution at 300K. What will be its, -1 -1 ., osmotic pressure? (Given R = 0.083Lbarmol K ), (MQP), , 3, SOLUTIONS, Government PU College (UU0038), Huliyar-Kenkere, Chikkanayakanahalli Taluk, Tumkur District-572218
