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- 1. What limitations are encountered in the application of sublimation as a general method of purification? 2.Explain how a process of fractional sublimation might be applied to a mixture of two substances which sublime closely together.Why would industry prefer to purify solids by sublimation or zone refining rather than recrystallization? (Hint: is there anything wasteful about recrystallization)Compare the solubility of nickel, silver, and cobalt in copper (host). How do you expect the phase diagrams to differ? Explain your reasoning.
- What limitations are encountered in the apolication of sublimation as a general method of purification?Due to the fact that the liquid you used was a volatile one, it will not completely recondense. Some of the liquid remains in the vapor phase, even at room temperature. If you were able to correct for this by making the vapors recondense completely, would your final molar mass value be greater than, less than or the same as the value you determined? Explain your reasoning.Sketch graphs of total vapor pressure versus the mole fraction of two volatile substances that show (a) positive deviation from Raoults law. (b) negative deviation from Raoults law. (c) a maximum boiling azeotrope. (d) a minimum boiling azeotrope.
- When performing a recrystallization of an impure solid, why is it important to allow the heated solution to cool slowly? Group of answer choices For the molecules of the pure solid to arrange in organized crystal lattices. To encourage solubility. To avoid the need for ice. To trap particles in the crystal lattice.1. Name two different industrial/commercial applications for benzoic acid. 5. Why is it important that melting points are recording using a slow heating rate 6. Benzoic acid is a solid at room temperature. Suggest and describe two different types of intermolecular force that are responsible for its observed melting point.Create your scale on the x and y axes. Estimate the boiling point of the mixture which is composed of 80% A and 20% B What will be the vapor composition?
- Filter paper is usually a poor material on which to powder a solid sample before introducing it into a capillary melting-point tube because small particles of paper may end up in the tube along with the sample. Why is this undesirable? and how might the presence of paper in the sample make the melting-point determination difficultDescribe how fractional distillation can better purify a mixture of liquids by discussing a liquid vapor phase diagram. Draw a liquid vapor phase diagram and use this in your answer.For the liquid acetone, list all IMFs that have to be broken in order for it to mix with water