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Question 12 1 pts Which of the following technique is primary used to purify organic compounds?...
Question 19 1 pts Which technique would be best suited to separate a mixture of compounds that differ primarily by their boiling point, 110 °C versus 145 °C? infrared spectroscopy distillation O thin layer chromatography O reflux O liquid-liquid extraction
Which technique would be best suited to separate a mixture of compounds that differ primarily by their boiling point, 110 °C versus 145 °C? thin layer chromatography infrared spectroscopy distillation liquid-liquid extraction reflux
1 pts Question 6 Which of the following techniques would be best suited for monitoring the progress of a given reaction? Reflux Liquid-liquid extraction O Distillation Melting point analysis Thin layer chromatography
Question 6 1 pts Which of the following techniques would be best suited for monitoring the progress of a given reaction? Liquid-liquid extraction Thin layer chromatography Distillation Reflux Melting point analysis
Distillation is a technique that is to purify liquid compounds. Use theoretical data to explain how distillation is used to separate the target product in this reaction from any residual unreacted starting material in the reaction. [2 marks] With this reaction: 2-methyl-2 butanol to 2-chloro-2-methylbutane (b.2-85.5 degree C)
Question 11 1 pts 1. b) A mixture of aspirin and caffeine (both are soluble in organic solvent and insoluble in water) can be separated by liquid-liquid extraction method Using NaHCO3 and chloroform: True/False O True O False Question 12 1 pts 1.c) in the above technique caffeine will be in the aqueous layer: True/False True False Question 13 1 pts 1. d) aspirin is in the organic layer: True/False True False D Question 14 1 pts 1. a) in...
Chromic acid, H2CrO4, is a strong oxidizing agent that oxidizes primary and secondary alcohols into carboxylic acids and ketones, respectively. Which technique would be most useful for monitoring the progress of the reaction? O Column choromatography Gas chromatography O Infrared chromatography Liquid-liquid chromatography Thin layer chromatography
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
Question 7 1 pts An anion-exchange chromatography is used to purify a protein whose net charge is zero when the solution pH is 8.0, what would be the pH of the protein containing solution have to be? Choose the best answer. O 12 0 7 8.9 10 6.0
Which of the following statements regarding thin layer chromatography are TRUE? Partition chromatography separates compounds based on how they distribute themselves between the stationary and mobile phases. In thin layer chromatography, a polar organic compound will be attracted to the adsorbent and therefore travel further up the plate than a non-polar compound The Rf value is independent of the adsorbent material used. In thin layer chromatography, a polar organic compound will be repelled by the adsorbent and therefore travel not...