(9) Given a Covation is c(x₁+)-Co 1-erf ( x 2 Jot CS-Co (9) A Solution of Fick's first lov (b) A Soketiers to Fick's Second low (C) An cauation fr Coeffcient of the smat explanation (b) Given below some formule in which Calculate equillits rium Concentration at vacanices ? to cat cv- e^(-QIRT) (9) CV = (b) Cv=e^ (QIRT) (C) Cv = MRT (d) Cu = N total" e^(-QIRT)
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- What volume (mL) of the prepared low alcoholic elixir is needed if the prescription requires 120 mL of an alcoholic elixir with 35% v/v alcoholic strength? Low alcoholic elixir alcoholic strength: 20% Low Alcoholic ElixirCompound Orange Spirit 10mLAlcohol 100mLGlycerin 200mLSucrose 320gPurified water, qs ad 1000mL High alcoholic elixir alcoholic strength: 79% High Alcoholic ElixirCompound Orange Spirit 4mLSaccharin 3gGlycerin 200mLAlcohol, qs ad 1000mL a 30.51 mL b 119.39 mL c 89.49 mL d 30.61 mLFigure 5.8 shows the phase diagram for the ternary system NH4Cl/(NH4)2SO4/H2O at 25 °C. Identify the number of phases present for mixtures of compositions (i) (0.2, 0.4, 0.4), (ii) (0.4, 0.4, 0.2), (iii) (0.2, 0.1, 0.7), (iv) (0.4, 0.16, 0.44). The numbers are mole fractions of the three components in the order (NH4Cl, (NH4)2SO4, H2O).Suppose the concentration of a solute varies along the length of a container according to c(x) = c0 - βc0x2, where c0 is the concentration at x = 0. Calculate the thermodynamic force on the solute at 25 °C and x = 8 cm and 16 cm given that the concentration falls to 1/2c0 when x = 15 cm. Hint: Start by finding the value of β.
- Hexanoic acid was added to an immiscible biphasic solvent sysem, 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 (D1) of hexanoic acid in CCl4 with respect to water.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.What is ΔSsys for a freezing phase transition at 29.7 °C for a compound that freezes at 29.7 °C and the ΔHsys = -19.45 kJ mol-1 for this process? Express your answer in J mol-1 K-1 to at least two significant figures.
- An experiment was conducted to determine the effect of glucose on the freezing point of water. Experimental data showed thatthe freezing point depression of water in solution was –2.6°C when 1.0 g of glucose was dissolved in 10g of solvent. Calculatethe expected freezing point for such solution and compare the expected freezing point to the value found experimentally. Give aplausible explanation for any discrepancies. (M.W. of glucose= 180.16g/mol; i=1). Show all your work.Extintion coeficient for Y is 128010.11/ A 1.5-kg specimen of a 90 wt% Pb-10 wt% Sn alloy is heated to 250°C (480°F), at which temperature it is entirely an a-phase solid solution . The alloy is to be melted to the extent that 50% of the speci- men is liquid, the remainder being the a phase. This may be accomplished either by heating the alloy or changing its composi- tion while holding the temperature con- stant. (a) To what temperature must the speci- men be heated? (b) How much tin must be added to the 1.5-kg specimen at 250°C to achieve this state? 10.15) A magnesium-lead alloy of mass 5.5 ka consists of a solid a phase that has a compo- sition that is just slightly below the solubility limit at 200°C (390°F). (a) What mass of lead is in the alloy? (b) If the alloy is heated to 350°C (660°F). how much more lead may be dissolved in the a phase without exceeding the solubility limit of this phase? 10.27 A hypothetical A-B alloy of composition 55 wt% B-45 wt% A at some temperature is found to consist of mass…
- A student determines the molar mass of a liquid unknown by the method used in thisexperiment. She found that the equilibrium temperature of a mixture of ice and water was1.0°C on her thermometer. When she added 12.3 g of her unknown sample to the mixture, thetemperature, after thorough stirring, fell to -4.0°C. She then poured off the solution through ascreen into a beaker. The mass of the solution was 93.4 g. Kf = 1.86°C/m What was the molality of the unknown solution? ______________ m How much unknown liquid was in the decanted solution? ______________ gHow much water was in the decanted solution? ______________ gWhat did she find to be the molar mass of the unknown liquid, assuming she made thecalculation properly?______________ gIn an experimental study of membrane-like assemblies of synthetic materials, a phase diagram like that shown was obtained. The two components are dielaidoylphosphatidylcholine (DEL) and dipalmitoylphosphatidylcholineIDPU. Explain what happens as a liquid mixture of composition xDel = 0.5 is cooled from 45 °C.A solution is prepared by dissolving 40.00 g of MgCl2 (f.w. = 95.211 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 2 L of solution at 25 °C. Assume the density of the solution is that of pure water (dsolution = 1.000 g mL–1). The ebullioscopic constant (Kb) for water is 0.513 °C m–1. The cryoscopic constant (Kf) for water is 1.86 °C m–1. The vapor pressure of pure water is 0.0313 atm. Determine the freezing point of the solution.