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- Write an expression to relate Ksp and solubility (S) for each of the following solids. A. Zn(OH)2 B. Ag3PO4 C. Sr3(PO4)2On a molecular level that is the order in which the two liquids analyzed elutes the gc. Two liquids: cyclohexane and tolueneWhen 2.0 g of aspirin was shaken up in a flask containing two immiscible liquids it was found that the mole fractions in the two liqu ids were 0.11 and 0.18. When a further 1.0 g of aspirin was added, it was found that the mole fraction in the first liquid increased to 0.15. What would you expect the mole fraction in the second liquid to become?
- The partial molar volumes of propanone and trichloromethane in a mixture in which the mole fraction of CHCI3 is 0.4693 are 74.166 cm3 mol-1, and 80.235 cm3 mol-1, respectively. What is the volume of a solution of total mass 1.000 kg?If 124.4 mL of water is shaken with oxygen gas at 0.81atm, it will dissolve 0.0036 g O2. Estimate the Henry's law constant for the oxygen gas in water in units of g mL ^-1atm^-1.A polynomial fit to measurements of the total volume of a binary mixture of A and B isv = 987.93 + 35.6774x − 0.459 23x2 + 0.017 325x3where v = V/cm3, x = nB/mol, and nB is the amount of B present. Derive an expression for the partial molar volume of B.
- Estimate whether theentropy of the system increases or decreases during eachprocess: (a) photodissociation of O2(g), (b) formation ofozone from oxygen molecules and oxygen atoms, (c) diffusionof CFCs into the stratosphere, (d) desalination ofwater by reverse osmosis.Chloroform and acetone form a maximum boiling azeotrope at a total pressure of 1.00 atm. What is the mol% of chloroform in this azeotrope at the azeotrope’s boiling temperature?In this problem you will model the mixing energy of a mixture in a relatively simple way, in order to relate the existence of a solubility gap to molecular behavior. Consider a mixture of A and B molecules that is ideal in every way but one: The potential energy due to the interaction of neighboring molecules depends upon whether the molecules are like or unlike. Let n be the average number of nearest neighbors of any given molecule (perhaps 6 or 8 or 10). Let Uo be the average potential energy associated with the interaction between neighboring molecules that are the same (A-A or B-B), and let UAB be the potential energy associated with the interaction of a neighboring unlike pair (A-B). There are no interactions beyond the range of the nearest neighbors; the values of Uo and UAB are independent of the amounts of A and B; and the entropy of mixing is the same as for an ideal solution. Find an expression for the maximum temperature at which this system has a solubility gap.
- The vapor pressures of 1,2-dibromoethane (M = 187.9 g mol-1and 1,2-dibromopropane (M =201.9 g mol-1), both measured at 343 K, are 12.90 and 9.17 kPa, respectively. Assuming thatthese two liquids form an ideal mixture, calculate the pressure of the vapor phase which is inequilibrium at 343 K with a liquid containing 50 % by mass of each of these componentsThe pure vapour pressure of benzene (C6H6) is 745 torr; the pure vapour pressure to toluene(C7H8) is 290 torr. What is the mole fraction of benzene in a benzene/toluene mixture whose total vapour pressure is 500 torr? Give answer to 3dp.Glucose from molasses is fermented to alcohol using S. cerevisiae where 500 ml of CO2 (at standard temperature and pressure) is produced. If the volume of the fermentation medium is 500 ml, what is the concentration of ethanol in g/ml?