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- You were given a mixture of two miscible solvent A and B that you are tasked to separate. You know that solvent A has a boiling point of 49 oC while solvent B has a boiling point of 174 oC. Which of the listed method would overall be the most efficient? Fractional distillation Recrystallization Solid-liquid extraction Liquid-liquid extraction Simple distillation Acid-Base extraction5 g of cobalt carbonate and 13 mL of concentrated hydrochloric acid were used. In another glass, prepare a solution with 8.4 mL of anhydrous ethylenediamine and 2.8 mL of concentrated hydrochloric acid. They are mixed and added and 6.5 mL of peroxide were added to it.30% hydrogen, thenconcentrated hydrochloric acid is added, followed by60 mL of ethanol. 5.1234 g were obtained orange solid [Co (en) 3] Cl3 What is the percentage yield of the reaction. The reactions are shown in the images.It was found that solubility of benzoic acid in water at differont temjperatures Was aceording to the follewing tuble. Tc 6 0 40 30 Logs 1.20 Jimol 1.415 1.58 1.77 calculate tne Valux of the chanye in enthalpy graphically?
- List and describe two methods that can used to improve the separation of a liquid mixture by fractional distillationWhat is the main concern with trying to distill azeotropic mixtures? options: 1- Specialized equipment is required, making separation expensive 2- There are no major concerns with distilling azeotropic mixtures. 3-The components become explosive at high temperature, making separation unsafe. 4- The boiling points of the components are too similar, making separation impractical. 5-The mixture will distill at a single temperature with a constant composition, making separation impossibleIs it possible to prepare a 17% dye solution from a 4% dye solution? Explain.
- Why do two layers form when solutions containing water are added to the extracted dichloromethane (CH2CI-2) solution?Will the melting point increase or decrease with the benzoic acid, 4-chloroanaline, and naphthalene if : -You do not remove all of the HCl from the first extraction (mixture) -You forget to do the NaOH extraction (aq layer) -You do not rotovap all of the solvent in the final step (organic layer)When you are extracting an aqueous solution with an organic solvent, you are uncertain of which layer in the separatory funnel is aqueous, how would you quickly sort out the issue.
- Separate a mixture of Vitamin D and Vitamin B2 (riboflavin) by paper chromatography. The stationary phase is methanol (CH;OH) and the mobile phase is pentane (C;H12). Place the vitamins in order of elution. Explain why using IMF. (Circle polar sites on each molecule and label all 4 molecules as polar or non-polar.) Vitamin B2 ö: డ H3C NH H;C CH3 CH3 CH3 H3C He H3C HO .. He CH2 Vitamin D He CH2OH HO19. A liquefied mixture of n-butane, n-pentane, and n-hexane has the following composition: n-C,H10 50%, n-C,H12 30%, and n-C,H14 20%. For this mixture, calculate: a) The weight fraction of each component. b) The mole fraction of each component. c) The mole percent of each component. d) The average molecular weight of the mixture.A student is working with cinnamic acid (lit. mp 133 °C) and sebacic acid (lit. mp 133 °C). After weighing out a sample of one of the acids, she forgets to label the vial and does not know which acid she has. How can the student use melting point analysis to determine the identity of her sample?