The aim of this experimen solution on the distribution coefficient of a drug, in this case benzoic acid. In order to LdEy out this investigation, a pre-prepared 0.001998 mol dm stock solution of benzoic acid in ethyl acetate was used to prepare standard solutions of varying concentrations whose absorbances were measured to produce a calibration plot. A biphasic liquid of stock solution nd oH 60 buffer was produced and the absorbance was then recorded and used to The process then reoeated
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- The following temperature-composition data were obtained for a mixture of octane (O) and methylbenzene (M) at 1.00 atm, where x is the mole fraction in the liquid and y the mole fraction in the vapour at equilibrium. The boiling points are 110.6oC and 125.6oC for M and O, respectively Plot the temperature-composition diagram for the mixture. What is the composition of the vapour in equilibrium with the liquid of composition (i)Xm =0.250 and (ii) Xo =0.250?1. Sodium carbonate is recovered as decahydrate from 1000kg of 5% solution of sodium carbonate in water. If it is desired that 95% of Na2CO3 is to be recovered as decahydrate by cooling to 278 K, determine the following: a) the mass of water evaporated (b) the mass of crystals obtained (Na2CO3 ∙ 10H2O). The solubility of Na2CO3 in water at 278K is 9.0% (weight) 2. A copra batch contains 44% oil and is to be extracted with n-hexane. The extracted meal contains 0.07 kg of oil/kg oil free matter and the mass fraction of n-hexane in it is 0.05. The extract contains 49% n- hexane. If 10,000 kg of copra are to be processed, how many kg of n-hexane are required and the determine the amount of extract. 3. Absorption of sulphur dioxide is carried out in a packed tower. Gas containing 14.8% sulphur dioxide and the rest inert gases enters the tower while the leaving gases contains 1% sulphur dioxide. Water flows at the rate of 1m3/min. The tower handles 7380 m3/hr of gas at 303K and 1 bar. Find…Determine the molar solubility (in mol/dm3) of solute A in a binary mixture at 1.32 bar if Henry’s constant is 3.80x102 KPa kg mol-1. The density of A is 0.95 kg dm-3
- After correction for the water conductivity, the conductivity of a saturated aqueous solution of AgCI at 25 °C was found to be 0.1887 mS m-1. Given that the limiting molar conductivity of AgCI at this temperature is 138.3 S cm2 mol-1 , what is the solubility of silver chloride at this temperature?What is the retardation factor of a pulse of dissolved benzene move through organic-rich wetland soil (organic carbon fraction of soil, foc=50%) if the effective porosity is 0.4 and the bulk density of the soil is 1.5 g/cm3. Follow these important hints: - Determine organic carbon partition coefficient (Koc) - Use this Equation: K oc = K d / f oc to calculate Kd. Select the range which includes your calculated answer. Group of answer choices 300 to 400 2.0 to 2.5 mg/l 2.0 to 2.5 2.6 to 4.8 0.5 to 1.0 2.6 to 4.8 mg/l None of these ranges include my answer.Penicillin F is recovered from a dilute aqueous fermentation broth by extraction with amyl acetate, using 6.5 volumes of solvent per 100. volumes of the aqueous phase. At pH = 3.8 the distribution coefficient KD is 74. What fraction of the penicillin would be recovered in a single ideal stage?
- The following temperature/composition data were obtained for a mixture of two liquids A and B at 1atm, where x is the mole fraction in the liquid and y the mole fraction in the vapour at equilibrium.T (°C) 110 120 130 140xA 0.73 0.43 0.25 0.10yA 0.96 0.78 0.60 0.36The boiling points are 105°C for A and 150°C for B. What is the composition of the vapour in equilibrium with the liquidof composition (a) xA = 0.35 and (b) xB = 0.25?The mean activity coefficients of HBr in three dilute aqueous solutions at 25° C are 0.930 (at 5.0 mmol kg-1), 0.907 (at 10.0 mmol kg-1), and 0.879 (at 20.0 mmol kg-1). Estimate the value of B in the extended Debye-Hückel law, with C = 0.Assuming that at 298 K the CMC for a cerrain surfactant is 6 X 10-3 M and that its mean aggregation number is 70, estimate the concentration of micelles if the bulk sur factant concentration is 0.08 M A quantity (390 mg) of n-hexane is solubilized in 100 mL of the surfactant solution. Assuming that all the solubilized n-hexane molecules are in the micelles, what is the mean occupation number of 71-hexane in the micelles For the system , estimate tlGo for micellization if the molecular weight of the surfactant is 326 g mol-I . If the enthalpy of micellization is 8 kJ mol- I, find the en tropy change when 1 mol of micelles forms from 70;:mhnomers.
- Hexanoic acid was added to an immiscible biphasic solvent system, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D2) of hexanoic acid in water with respect to CCl4.The following concentrations of the vapour at two consecutive trays in the rectifying section of a column have been measured: y3 = 0.94 and y4 = 0.925. The equation of the operating line is y = 0.6667x + 0.32. The relative volatility at the liquid composition on the third tray is α = 1.85. Calculate the Murphree efficiency of the tray.In gravimetric analysis, co-precipitation occurs alongside with analyte precipitation,resulting in the introduction of impurity and excess mass. Occlusion and inclusion areamong the sources of impurities. Distinguish the difference between occlusion andinclusion and compare them using diagrams