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A: The solution is given below -
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A: What is the aim of (solids:recrystallization and melting points) experiment?
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Explain and elaborate how the following purification techniques work:
a. Sublimation
b. Recrystallization
Step by step
Solved in 2 steps
- Which is not required in recrystallization? a. solution is filtered at high temperature b. moderate volatility solvent c. saturated solution d. solvent must dissolve the impurities6. In a recrystallization, why is it important to dissolve the solute in boiling solvent instead of cold solvent? a. To melt the solute b. To boil the solute c. To use as small amount of solvent to dissolve the solute as possible d. To chemically decompose the impuritiesWhy is it important to know if a substance is a molecular compound or an ionic compound before predicting its effect on the boiling and freezing points of a solvent? Ionic compounds dissociate, resulting in more particles in solution, which affects the b.p. and f.p. Molecular compounds dissociate easier than ionic compounds, thereby having a greater effect on the b.p. and f.p. Ionic compounds have higher boiling points and lower freezing points than molecular compounds Ionic compounds have the opposite effect on freezing and boiling points than molecular compounds. Molecular compounds have greater intermolecular forces than ionic compounds Molecular compounds have a greater effect on the van't Hoff factor than ionic compounds
- ………… is usually used only to separate liquids whose boiling points differ greatly or to separate liquids from involatile solids or oils. which option is correct?a. distillation b. simple distillation c. fractional distillationd. steam distillation e. vacuum distillationWhat is brewing tea in water an example of? A. solid-liquid extraction B. liquid-liquid extraction C. none of the above D. recrystallization E. all of the aboveThe process that drives dialysis is dependent on a. the dispersing medium b. vapor pressure c. the Tyndall effect d. osmosis
- The dissolved coffee in hot water can be separated by which technique? a. using a magnet b. evaporating the water c. filtering the solution d. decanting the solution2. When preparing a non-aqueous alcoholic solution that is required to be free of water:a. What solvent is suitable for calibrating the bottle it is prepared or dispensed in?b. What solvent should not be used for calibration?acting in modulating solubility. lipophilicity, and cell permeation (e.g. antibiotic or antihistaminic drug classes)* Solubilizer Bioprecursor O Pharmacophore
- 6. Suppose you have a mixture of water and your 2-bromo-2-methylbutane product in a separatory funnel. Use densities to predict which phase will be the top layer in the funnel. a. 2-bromo-2-methylbutane (organic phase) b. water (aqueous phase) c. there would only be one phase since the substances are miscibleHow do we keep relative supersaturation low by controlling solubility? a. solubility should be fluctuating b. solubility should be higher c. solubility should be constantThe compound above would be soluble in A. Water B. Hexane C. NaCl/water solution D. More than one choice is correct