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- 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.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.Betnovate-RD® contains 0.025% w/w betamethasone valerate in a water-miscible basis. How much betamethasone valerate is contained in a 100g tube?
- https://www.youtube.com/watch?v=jDgSohKVLio Compare the results obtained when soap solution was added to the permanent hard water treated with sodium carbonate with that obtained when it was added to the untreated permanent hard water. Compare the amount of bubbles and precipitate formed.Dissolved 0.273 grams of pure sodium oxalate (Na2C204) in distilled water and added sulfuric acid and titration the solution at 70 °C by using 42.68 ml of KMNO4 solution and has exceeded end point limits by using 1.46 ml of standard oxalic acid (H2 C204) with 0.1024 N. Calculate the normlity of KMNO4. Note that the molecular weight of sodium oxalate (Na2C204) = 134 and its equivalent weight = 67 * %3DThe analgesic aspirin is soluble at 25oC in water to the extent of 3mg/mL and in ethylacetate to the extent of 86 mg/mL. The approximate distribution coefficient of aspirin in these two solvents is __
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- 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 diagrams1. Why must the solution be saturated when its solubility is determined? 2. Compare your experimental value for Ksp of Ca(OH)2 with the literature value (Ksp = 8.0 × 10-6 at 25°C). Account fora anydifference. 3. Is Ca(OH)2 more soluble in aqueous solution containing calcium ions or in pure water? Explain your observation in terms of shift in equilibrium and in terms of the ion product in relation to Ksp. 4. Cite possible sources of error in the experiment. 5. The solubility of CdS in water is 1.29 x10-12 M. Determine the solubility product constant for CdS. 6. The solubility product constant of Cd(OH)2 and Co(OH)2 are 7.21 × 10–15 and 5.92 × 10–15, respectively. In terms of calculating molar solubility, which of these hydroxides is less soluble?Your current Vmax estimate from the Michaelis-Menten plot has the units of ?/? and was determined using 0.1 mg of ADH in a total volume of 1.25 mL. Use the Beer-Lambert equation followed by a simple conversion to express your estimated Vmax in ???? per 1 mg ADH. The molar absorptivity of NADH at 340 nm is 6220 ????∗??. Following the previous instructions, express your calculated Vmax from the Lineweaver-Burk plot in ???? per 1 mg ADH.