Can I get this question answered with an explanation Why is it better to acquire the 1H-NMR spectrum in DMSO-d6 and not in CDCl3? Day 2: Recrystallization and analysis of the o-chlorobenzoic acidRecrystallize the product using hot toluene. Be sure to add enough toluene so that the soliddissolves at a higher temperature, but some of the solid stays undissolved at room temperature. Donot add too much toluene, as you may not be able to crystallize your product. Ifadded too much toluene, or if o-chlorobenzoic acid crystals do not appear upon cooling the solutionon ice, you will need to evaporate some of the toluene in the hood. The crystals should besuspended fully in toluene before filtration.you believeyouAfter drying the solids, determine the melting point of the product. Acquire the infrared spectrumand the 'H-NMR spectrum in DMSO-d6.Cleanup Notes: Solid MnO2 often sticks to the glassware and is difficult to remove, even withsoapy water and scrubbing. You can easily clean your glassware, however, by using 12 M HCl. Inorder not to waste the concentrated acid, transfer your concentrated HCl washings into a largebeaker which can be used many times by other students. Clean your ground-glass joints by dippingthem into the acid wash solution. To clean your flask, pour the concentrated acid into your flaskand swirl. The MnO2 should be easily removed using these procedures. The acid wash solutioncan be re-used several times by pouring it back into the collection beaker so that it is available toother students.Cleanup Caution: Before you use the concentrated HCI, be sure your flask is rinsed and free ofany solid material. Do not leave excess water in the flask. Once your flask is clean and free ofloose residue, you can then remove the bound MnO2 which stains your flask by adding theconcentrated HCl.

Every nuclei will have spin and if an external magnetic field is applied, there will be an energy…

Answered: Can I get this question answered with…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter20: Acidity And Pka Of Phenols

Section: Chapter Questions

Problem 11E

See similar textbooks

Similar questions

In step 2 of the reaction sequence HCl is added to the basic reaction mixture after the reflux period. Show a reaction (with full structures) that explains the purpose of the HCl.
Adol Condensation Lab, Organic Chemistry 2: The same physical property that helps drive the reaction to completion can also stall out the reaction before it starts. What do we do in the procedure that helps minimize this concern? (initially I said that the driving force is 1) reactivity of carbonyl compounds 2) stability of the product please be as detailed as possible, will mark as helpful
Show the two step dissociation process for H2SO4. Do both acidic hydrogens dissociate 100%?
for (4) and (5) please provide reactants and why it was chose
Melting point range Recrystallized Phenacetin 95-100 Recrystallized Phenacetin + Reference Phenacetin 110-115 Recrystallized Benzil 92-95 Recrystallized Benzil + Reference Benzil 94-98 Questions: 1. What does your melting point say about the purity of your phenacetin sample? Justify your answer using the characteristics of mixed melting point. 2. What does your melting point say about the purity of your phenacetin sample? Justify your answer using the characteristics of melting point. 3. What are two characteristics of a good recrystallization solvent for a given compound? 4. Given a solid sample that contains impurities, how would you determine which solvent to use for a recrystallization? Describe how you would do this in the laboratory. 5. Clearly explain the difference between a recrystallization and a precipitation.
Why is it important to thoroughly vortex the contents of the vial after adding reagent 4 (Steps 3 and 4., stage 1). To ensure that the two immiscible solvents come into contact with each other, permitting the derivatization reactions to occur. B.To ensure that the solution is mixed thoroughly. To ensure that all the amino acids are transferred to the lower aqueous layer so that a full extraction occurs. To remove all the interferring compounds by transferring them to the upper organic layer Hint: Reagent 4 is the derivatizing agent dissolved in octane.
Reaction with Alcohols (esterification)a. Mix 1 mL of glacial acetic acid, 1 mL of ethyl alcohol and 3 drops ofconcentrated sulfuric acid (CAUTION!). Cautiously note the odor.Result: ___________________________________________________________________To what compound is the odor due? ________________________________________Equation: _________________________________________________________________b. To about 0.1 gm of salicylic acid in a test tube, add 1 mL of methyl alcoholand 3 drops of concentrated sulfuric acid (CAUTION!). Heat the mixture gentlyfor 1 – 2 minutes, then pour the mixture into about 20 mL of cold watercontained in a beaker. Observe the odor of the product formed. _____________What compound produces this odor? ______________________________________Equation: ______________________________________________________________
For question 1a and 1b below, which of the puzzle pieces makes the best sequence for each synthesis? You must solve the syntheses with the puzzle pieces provide and nothing else. One piece can only be used once.
At the start of lab, Anthony adds vanillin to his Erlenmeyer flask, then adds sodium hydroxide, and lets the suspension cool. i. With minimal words, identify the reaction that takes place between sodium hydroxide and vanillin. ii. Is sodium borohydride capable of inducing the same reaction as (i)? Explain.
Q1: Give one lysis buffer that is commonly used for western blotting experiments and include its components Q3: To make sure that you used a similar amount of samples, what important step should be done before proceeding the electrophoresis stage? Q4. Why is it necessary to store the prepared lysates in a very low temperature?
EXPERIMENT 7 Part A THE PREPARATION AND PURIFICATION OF BENZOIC ACID ___________________________________________________________ LEARNING AIMS To gain familiarity with the use of reflux and filtration apparatus To synthesise and purify a solid organic compound via a recrystallisation To record melting points LEARNING OUTCOMES To understand reaction mechanisms and “curly arrows” To determine compound purity through mixed melting points To calculate chemical yields _____________________________________________________________________ INTRODUCTION Before attending the laboratory read the following sections on techniques: Reflux Weighing Recrystallisation and filtration and, in the spaces in the instructions, estimate (in minutes) how long it will take you to reach each stage. THEORY Benzamide (containing a CONHB2B group) can be hydrolysed by heating with concentrated sodium hydroxide to yield the (water soluble) sodium salt of…
At the start of lab, Anthony adds vanillin to his Erlenmeyer flask, then adds sodium hydroxide, and lets the suspension cool. i. With minimal words, identify the reaction that takes place between sodium hydroxide and vanillin. ii. Is sodium borohydride capable of inducing the same reaction as (i)?

SEE MORE QUESTIONS

Recommended textbooks for you

Organic Chemistry: A Guided Inquiry

Chemistry

ISBN:

9780618974122

Author:

Andrei Straumanis

Publisher:

Cengage Learning

Organic Chemistry: A Guided Inquiry

Chemistry

ISBN:

9780618974122

Author:

Andrei Straumanis

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS