a. According to the following TLC plate, is the reaction complete? Why or why not? A: Starting material B: Product C: Reaction mixture A B C b. According to the following TLC plate, is the reaction complete? Why or why not? A: Starting material B: Product C: Reaction mixture A B C
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- c. Often chemists are synthesizing a new molecule, we can only compare the reaction mixture to the starting material. According to the following TLC plate, is the reaction complete? Why or why not? A: Starting material B: Reaction mixture A BFor question below the separation scheme, please indicate the compound that best fits in the blank of the separation scheme . Hint: s = solid, I = liquid, g = gas and aq aqueous. 4-methylacetophenone soluble aluminum salt (A1C13 destroyed by aqueous HC1) acetic acid (from any unreacted acetyl chloride) trace toluene hydrochloric acid water methylene chloride aq soluble aluminum salt acetic acid hydrocholic acid water multiple Extractions with water and methylene chloride organic 4-methylacetophenone methylene chloride trace toluene trace acetic acid, and H₂O trace 3) organic 4-methylacetophenone methylene chloride trace toluene trace water extract with aqueous aq 5) sodium chloride water CO₂(8)How can you use TLC to determine if a chemical reaction has gone to completion? For example, treatment of cyclohexanol in the presence of a non-nucleoplhilc acid, sulfuric acid gives the corresponding alkene, cyclohexene via an E1 reaction. Draw 3 examples of TLC plates: a) at the beginning of the reaction, b) during the reaction, and c) at the completion of the reaction. Explain what is shown on each plate. Hint: What are the dominant intermolecular interactions of cyclohexanol and cyclohexene?
- How can We use GC analysis to confirm the identity of the product?Consider the following organic reaction NABH4 Ph Ph ELOH a) Draw the product of the reaction b) Draw and label the TLC plate that you would expect to see when the reaction is 50 % complete c) Draw and label the TLC when the reaction is 100 % completeGroups of peaks can indicate specific functional groups. What would a quartet at 3.5 ppm and a triplet at 1.8 ppm indicate? a-CH(CH3)2 group. a-CH₂CH3 group. a-C(CH3)3 group. a -CH₂CH₂CH3 group. a-O-CH₂CH3 group.
- When we were doing the GC analysis of our product from dehydrobromination of 2- bromobutane, we commonly saw a large peak at the very beginning of the GC spectrum. What is the peak? It's some byproduct from SN2 reaction It's air in our product mixture It's some residue from last run of GC It's the noise of GC instrument7. A student gets the following results after running a TLC plate of several over the counter analgesics. What should the student do to get better results? O Run the TLC for a longer time. O Co-spot the sample several times. Run a new TLC plate in a less polar solvent. O Run a new TLC in a more polar solvent mixture.A triester that contains three identical R groups can be extracted from coconut oil. This triester can react with potassium hydroxide in a reaction known as hydrolysis, as shown in figure 5. RCOO RCOO RCOO CH₂ | CH CH₂ Tri-ester + 3 KOH Deduce the value of 'n' in CH3(CH₂)n 3 RCOOK + Figure 5: Reaction showing the hydrolysis of a triester. Product X Using mass spectrometry analysis, it was determined that the coconut triester has a relative molecular mass, Mr= 638.0. In the reaction shown in figure 5, R represents a hydrocarbon chain group that can be written as CH3(CH₂)n.
- Which of the following mixtures can be efficiently separated by simple distillation? a.) H2ONACI B.) CH3OH / H20 C.) CH3CH2CH2CH2CH2CH3 and CH3CH2CH2CH2CH3 D.) CH3COCH3 (acetone) and CH3CH20CH2CH3 (diethyl ether)Pease indicate the compound that best fits in the blank of the separation scheme below. OH H2N Benzoic Acid Biphenyl Benzocaine Phenol benzocaine phenol biphenyl benzoic acid dissolve in ether; extract with aqueous 19)_ ether aq 20) CO:(g) H2O HIDDEN COMPOUND 1 HIDDEN COMPOUND 2 HIDDEN COMPOUND 3 trace 21) |6.0M М НСI aq NaCl 22). HO Which of the following is the best choice for blank 21 in the given separation scheme? O H2SO4 O pentane O HCI NaHCO3 O H20Asap