Why does one set of experiments give a positive r value, whereas the other set of experiments gives a negative r value?

Q: Quinine 0.07 0.26 0.19 Codeine 0.16 0.53 0.38 Cocaine 0.65 0.90 0.73 Strychnine 0.28…

A: Rf value: It is the ratio of distance travelled by solute to distance travelled by solvent.…

Q: You and your lab partner are monitoring a reaction via TLC. Upon spotting and running the plates,…

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Q: If we did the paperclip activity with a cup of isopropyl alcohol instead of water, would you expect…

A: If the paperclip activity is done with a cup of isopropyl alcohol instead of water, different…

Q: Define the difference between E1 and E2 mechanisms ?

A: The difference between E1 and E2 mechanisms are, For example,

Q: In the mechanism for cyanohydrin formation, why is HCN the acid that protonates the alkoxide ion…

A: The reaction mechanism for the process is as given below:

Q: 8. What reagents could interfere with the 2,4-DNPH test? (Hint: What properties does 2,4-DNPH have?)

A: Carbonyl compounds and imide generally undergo a process called tautomerization. Tautomerization is…

Q: Does the coupling partner of a diazonium dye contain an activating or a deactivating group. Explain…

A: We have to discuss about activating or a deactivating group of coupling partner of a diazonium dye.

Q: Interpret the following TLC results based on the addition of bromine to stilbene. Do the TLC data…

A: The alkene functional group is identified by the presence of a carbon-carbon double bond. For…

Q: The Lipinski’s rules indicate poor absorption when:   The molecular weight is > 500 Da The number…

A: Answer: 27.A.  The molecular weight of Fluconazole is 306.271g/mol which is less than 500 Da (1…

Q: Draw the product of this reaction. Ignore inorganic byproducts. Br Br КОН, Д

A: The answer to the following question is-

Q: A natural product was isolated in the laboratory, and its observed rotation was +10° when measured…

A: Given,  The observed rotation is +10° Length of the tube is 1 dm Concentration of the sample is 1.0…

Q: Draw the molecular structure of the molecule alpha tocopherol and the fatty acid eicosapentaenoic…

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Q: Discuss how bromobutane was made (the mechanism) and then how it was purified. Discuss success of…

A: Organic synthesis is the synthesis of organic molecules through various reactions. Bromobutane can…

Q: What is the purpose of the ammonium acetate in this experiment? How does it affect the ppt?

A: An ammonium salt obtained by reaction of ammonia with acetic acid. A deliquescent white crystalline…

Q: Identify the electrophilic centre that is attacked on the structure of parecoxib. For this question…

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Q: КОН RCONH2 Br2 RNH2

A: The given reaction is conversion of amide to amine. Amide in presence of KOH(base) and Br2 gets…

Q: Explain why the reagents are added in the specific sequence described in the experiment.

A: To explain why reagents are added in the specific sequence in an experiment.

Q: Briefly explain the mechanism of the Duquenois-Levine test a) What is the purpose of the addition of…

A: The Duquenois-Levine Test , also known as the simple Rapid Duquenois Test , is an established…

Q: 3. GC analysis: Dr. Eder ran a similar Sn1 reaction in her lab: to H2O, RT Br Dr. Eder uses GC to…

A: Answer -

Q: Briefly explain what rho-dependent and rho-independent termination processes have IN COMMON. (three…

A: Rho dependent and rho independent termination processes briefly explanation is given below.

Q: What is the reaction involved in this experiment?

A: In this experiment we determine the %(w/w) composition of H2O2 by reacting it with KMnO4(aq) or…

Q: In both SN1 and SN2 tests, why should 2-chlorobutane react more slowly than 2-bromobutane?

A: We are authorised to solve only one question at a time. Please post rest of the questions…

Q: H. - Cr heat haffmann elimination Reoction

A: Given chemical reaction is Hoffmann elimination reaction. It is an elimination reaction in which a…

Q: is the product in the IR spectrum the same as the molecule shown in the photo? If so what is it?

A:

Q: Can you please answer and clearly show your work for all the parts to this question.   Draw the…

A: Those organic compounds which have a carbonyl carbon connected at the end of carbon chain and…

Q: What are the differences and similarities between E1 and E2 mechanisms

A: The similarities and differences between E1 and E2 mechanism has to be given.

Q: Explain the purpose of the desiccator. How would your results differ if you didn’t use it?

A: Qualitative analysis is a branch of chemistry that deals with the identification of elements present…

Q: Write

A: When molecular bromine react with H2O then it's called bromine water this will produces an…

Q: 2-) What is the reason to use the aldehyde having no alpha hydrogen in Cannizzaro experiment

A: In cannizzaro reaction aldehyde and ketones are used where no Alpha hydrogen is not available.

Q: Which of the following Lineweaver-Burk parameters does not change when inhibitor X is added to the…

A: The Lineweaver–Burk plot can distinguish inhibitors (competitive, non-competitive and…

Q: If your sample gave you negative absorbance values during the kinetics run, what’s the most likely…

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Q: Provide two reasons why the compound below would be a good substrate for studying trypsin catalyzed…

A: Trypsin is an enzyme digesting protein. Trypsin usually breaks down the proteins and digests them.…

Q: A3 A student performing the chromophores experiment noticed no pigments on their plate after…

A: A chromophore is a part of a molecule responsible for the color of the molecule. A chromophore is a…

Q: How would you determine if biphenyl was produced in your reaction? would it be in IR and how would…

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Q: What is ΔrS for a reaction that has ΔrH = -64.8 kJ mol-1 and ΔrG = 84.7 KJ mol-1 at 19.9 °C? Express…

A:

Q: Which of the following reactions is favorable, in the direction indicated, under "normal" laboratory…

A: Good nucleophile and good electrophile give reaction in normal laboratory conditions

Q: How can we use UV/VIS spectroscopy to measure the rate of a reaction?

A: Ultraviolet-visible spectroscopy helps in analysis of compounds. It also helps in measuring rate of…

Q: Please explain how you came about your answer for these questions

A: unsaturated compounds addition with  excess amount of HBr to give corresponding saturated compounds.…

Q: A student planned to utilize HPLC to separate her chemically synthesized product (1) from th…

A: HPLC stands for High Performance Liquid Chromatography which is used to separate and identify…

Q: What is the outcome of the reaction sequence shown in the box? 1. Base 2. Allylbromide H3CO 3. НСІ,…

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Q: Show the difference between SN1 and E1 Reactions ?

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Q: What would happen to the Rf values of the pigments if you were to increase the relative…

A: The developing solvent is accountable to move the substances along column or plate. Acetone is…

Q: For each of the statements in Column I, choose a substituent from Column II that fits the…

A: The electrophilic aromatic substitution reaction involves the replacement of a group in the benzene…

Q: What is the general type of reaction performed in this experiment? substitution addition elimination…

A: In above mentioned question bromination of alkene is represented. In alkenes at least one double…

Q: If we give same sample to three different students in the same lab, why the result of melting point…

A: Melting point is the temperature at which the solid substance melts and converted into liquid phase.…

Q: what compound is this based in the IR spectroscopy

A: IR spectra of a compound helps us to know the class of organic compounds, to which it belongs.   IR…

Q: Write down the reaction and mechanism for the experiment.

A: Reaction and mechanism given below.

Q: Compare acetanilide, which was in the recrystallization lab and acetaminophen (2) shown below. Which…

A: Comparison of Rf values between acetanilide and Acetaminophen

Q: Draw the cation products of the fragmentations that account for the peaks in 1-bromo-2-methylbutane:…

A: In mass spectrum intensity vs m/z (mass of fragment) graph is obtained. From the mass of the…

Q: What is the structure of the resulting confirmation after the ring flip?

A: In this question, we will draw the structure of this confirmation after ring flip.  You can see…