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Pre-Lab Assignment 1 (detach and submit to your TA at the beginning of your lab session)...
Hi can someone help me with my pre lab theory questions (1,2,3) on rate of elution...
Hi can someone help me with my pre lab theory questions (1,2,3)
on rate of elution or Rf? Here is some background below. Please
help explain as many as possible (1-3)! I dont really get the
relation ships in this lab, thank you!
1. What factors affect the rate of elution in organic compounds? 2. Explain what is the relationship between polarities of compounds (polar/non- polar compound) and rate of elution (Rf). 3. Explain what is the relationship between solvent...
can u help me with 1,2,3? 1. (2 pts - 1 pt for correct traveling order,...
can u help me with 1,2,3?
1. (2 pts - 1 pt for correct traveling order, 1 pt for explanation) Based on the skeletal structures of biphenyl, benzhydrol and benzophenone, for a given TLC eluent, which of the three compounds would you expect to travel further on the TLC plate, and why? Copy your prediction into the Introduction section of your lab notebook. 2. (1 pt -0.5 pts per spot) Calculate the retention factor (R1) for each of the spots...
This assignment is to be completed before your assigned lab session. Be sure to write your answers clearly and legi...
This assignment is to be completed before your assigned lab session. Be sure to write your answers clearly and legibly. You may write directly on this page and tear it out of your lab manual, or you ay write your answers on a separate sheet of paper. Predict the order of elution of a mixture of biphenyl and benzoic acid on a TLC plate in a 1:1 Sthyl acetate:hexanes solution. Would the order be different if the solvent system's composition...
Pre-Lab Assignment, Lab 3 (detach and submit to your TA at the beginning of your lab...
Pre-Lab Assignment, Lab 3 (detach and submit to your TA at the beginning of your lab session) Name: Date: TA: 1. Consider 30.0 mL of water th temperature that should be observed? (in "C) Show your work. at has absorbed 1540 J of heat from a chemical reaction. What is the change in 2. Write ba producing sodium chloride and water; b) ammonium chloride and sodium hydroxide producing ammonia, sodiun chloride and water, c) reaction of aluminum with hydrochloric acid...
Pre Lab Questions 1. Complete the following table: Compound Acetanilide (A) Benzophenone (B) Mandelic acid (C) Benzi...
Pre Lab Questions 1. Complete the following table: Compound Acetanilide (A) Benzophenone (B) Mandelic acid (C) Benzil (D) Benzoic acid (E) Structure Solubility in hexanes Solubility in ethyl acetate 2. Using the following diagram of a TLC plate, answer the following questions: solvent front a) Which compound is more polar if the stationary phase is silica gel? b) True or False: If the solvent mixture was made less polar, the compounds would move farther. c) Use a ruler and calculate...
Grignard Reaction with a Ketone: Triphenylmethanol Introduction: The purpose of this lab is to prepare phenylmagnesium...
Grignard Reaction with a Ketone: Triphenylmethanol Introduction: The purpose of this lab is to prepare phenylmagnesium bromide, a Grignard reagent, and react it with benzophenone to give triphenylmethanol. Grignard reagents are very reactive and must be synthesized in an environment free of water or any other source of potential proton donor. Once made, the Grignard reagent will do a nucleophilic attack on the carbonyl carbon of the ketone, benzophenone. The result is an alkoxide that is then protonated to give...
Pre-Lab Assignment 1) Draw the reaction mechanism for the reaction. 2) Determine the limiting reagent. Procedure...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
What is the theoretical yield (in grams) and percent yield of your triphenylmethanol product in this...
What is the theoretical yield (in grams) and percent yield of your
triphenylmethanol product in this experiment? (Weight of
triphenylmethanol: 0.060g)
BACKGROUND AND THEORY The Grignard reaction was one of the first organometallic reactions discovered and is still one of the most useful synthetically. By reacting an organohalide (usually a bromide) with magnesium in ethereal solvent, carbon becomes a nucleophile. Grignard reagents are the starting points for the syntheses of many alkanes, primary, secondary, and tertiary alcohols, alkenes, and carboxylic...
Hi can someone help me with my pre lab theory questions (1,2,3)
on rate of elution or Rf? Here is some background below. Please
help explain as many as possible (1-3)! I dont really get the
relation ships in this lab, thank you!
1. What factors affect the rate of elution in organic compounds? 2. Explain what is the relationship between polarities of compounds (polar/non- polar compound) and rate of elution (Rf). 3. Explain what is the relationship between solvent...
can u help me with 1,2,3?
1. (2 pts - 1 pt for correct traveling order, 1 pt for explanation) Based on the skeletal structures of biphenyl, benzhydrol and benzophenone, for a given TLC eluent, which of the three compounds would you expect to travel further on the TLC plate, and why? Copy your prediction into the Introduction section of your lab notebook. 2. (1 pt -0.5 pts per spot) Calculate the retention factor (R1) for each of the spots...
This assignment is to be completed before your assigned lab session. Be sure to write your answers clearly and legibly. You may write directly on this page and tear it out of your lab manual, or you ay write your answers on a separate sheet of paper. Predict the order of elution of a mixture of biphenyl and benzoic acid on a TLC plate in a 1:1 Sthyl acetate:hexanes solution. Would the order be different if the solvent system's composition...
Pre-Lab Assignment, Lab 3 (detach and submit to your TA at the beginning of your lab session) Name: Date: TA: 1. Consider 30.0 mL of water th temperature that should be observed? (in "C) Show your work. at has absorbed 1540 J of heat from a chemical reaction. What is the change in 2. Write ba producing sodium chloride and water; b) ammonium chloride and sodium hydroxide producing ammonia, sodiun chloride and water, c) reaction of aluminum with hydrochloric acid...
Pre Lab Questions 1. Complete the following table: Compound Acetanilide (A) Benzophenone (B) Mandelic acid (C) Benzil (D) Benzoic acid (E) Structure Solubility in hexanes Solubility in ethyl acetate 2. Using the following diagram of a TLC plate, answer the following questions: solvent front a) Which compound is more polar if the stationary phase is silica gel? b) True or False: If the solvent mixture was made less polar, the compounds would move farther. c) Use a ruler and calculate...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
What is the theoretical yield (in grams) and percent yield of your
triphenylmethanol product in this experiment? (Weight of
triphenylmethanol: 0.060g)
BACKGROUND AND THEORY The Grignard reaction was one of the first organometallic reactions discovered and is still one of the most useful synthetically. By reacting an organohalide (usually a bromide) with magnesium in ethereal solvent, carbon becomes a nucleophile. Grignard reagents are the starting points for the syntheses of many alkanes, primary, secondary, and tertiary alcohols, alkenes, and carboxylic...
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