Good evening, Could you write me an abstract for the Dependance of Distribution Coefficient Upon pH? Even if its just the first paragraph. There is an example one ive attached below.
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Q: Good evening, Could you write me an abstract for the Dependance of Distribution Coefficient Upon pH?…
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- 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.One technique for studying the energetics of protein structure is to monitor the struc- ture of the protein as a function of the osmotic pressure. In these experiments the os- motic pressure of the solution is varied by using polymers of different molecular weight and concentration. In an experiment poly(ethylene glycol) (PEG) with a molecular weight of 1000.0 g mol- was used. What concentration of PEG is needed to create an aqueous solution with an osmotic pressure of 150.0 Pa at 25°C? You may assume that PEG is uncharged and that it does not dissociate or aggregate.You carry out an experiment on the physical properties of 3 organic compounds and observe the following data: Substance Solubility in Water medium Compound A low Compound B high Compound C You know that the 3 organic compounds are an alkene, ketone and alcohol of equal hydrocarbon length. Match the compounds above to their specific organic compound type based upon their solubility. And give a structural reason for the solubility observations that are observed. (I:3) Substance Identity Reason Compound A Compound B Compound C
- Water and 1-butanol are only partially miscible, so that when the two liquids are mixed, separate phases are formed. A mixture is prepared, in which the volumes of the aqueous and organic phases are equal. Ethanoic acid is then added to the mixture. The concentration in the aqueous phase is 0.094 mol dm-3 and in the organic phase 0.014 mol dm-3 . Additional solvent is then added such that the volume of the aqueous phase becomes double that of the organic phase. What are the new concentrations?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.(4.113+1 5. A monoprotic acid (HA) with K, of 8.76 x 10 has a partition coefficient of 3.9 (favoring octanol) when distributed between water and octanol, An aqueous solution (100.0 ml, pH 4.50) initially containing a 0.200 M formal concentration of HA is extracted once using 30.0 mL of octanol. a) What is the extraction efficiency? b) Calculate the formal concentration of the acid in both the water phase and the octanol phase after performing the extraction. Fwater = Foctanol = c) Would the extraction efficiency increase, decrease, or not change if the pH of the aqueous phase is adjusted to 7.00 prior to performing the extraction? no change Circle one: increase decrease Briefly explain:
- 3. A sealed glass vial is prepared with 4 mL of air and 36 mL of water. Trichloroethylene (TCE) is added to the water to create an initial aqueous phase concentration of 100 ppb (a) (b) After the system equilibrates, what will the concentration of TCE be in the aqueous phase (in µg/L)? Determine the % mass partitioning of TCE between the water and the air when equilibrium is established. (c) If a quantity of TCE is accidentally spilled into a well-mixed river, where would you expect most of the TCE to end up in the short term - in the air or in the water? Explain.Solute A has a partition coefficient of 3 between toluene and water, with three times as much in the toluene phase. Suppose that 100 mL of a 0.010M aqueous solution of A is extracted with toluene. What fraction of A remains in the aqueous phase, if five extraction with 100 mL is performed?A chemical solute has a partition coefficient of 11.2 between hexane and water. If the equilibrium concentration of solute in hexane is 0.00815 M, the equilibrium concentration of the solute in water is: a)7.59 x 10-4 M b) 0.0913 M c)0.00815 M d)1.37 x 103 e)None of These
- 3.) The following Beer's Law calibration plot was collected at 391.9 nm using the five mixtures listed above. The trendline equation was y = 4617.1x. A saturated solution of lead(II) chromate had an absorbance of 0.0025. Calculate its solubility, in molarity. Molar Solubility of PbCrO4: x 107 M ABSORBANCE VS CHROMATE CONCENTRATION AT 391.9 NM 1.40 1.20 y = 4617.1x R-0.9972 1.00 0.80 0.60 0.40 0.20 0.00 C 0.00005 0.0001 0.00015 0.0002 0.00025 0.0003 Chromate concentration (mol.L)Calculate the amount of ester, CH3COOCHs formed when 2.00 moles of ethanoic acid,CH3COOH and 2.00 moles of ethanol, C2HsOH are allowed to come to equilibrium at 300 K CH3CO0C2Hs(aq) + H2O(1) Kc=4.12 (ANS = nCH3COOCHs= 1.414 mole; mass CH3COOC2Hs= 124.43 g)(1) Calculate the amount of lime and soda required for softening 9000 litres of water sample containing in ppm, Mg(HCo = 50; CaCl, = 111; MgSO, = 120; CaSO, = 138; NaCi = 480 and Fe-O, = 234, The lime of 80% and soda of 90% purity was utilized in the process. (i) You are given a task to treat the hard water to produce clear, transparent, and softened water (the residual hardness up to 20 ppm is allowed). As a responsible engineer of the plant, what is your strategy to generate the water of required softness? Explain