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Explain the differences in acidity between p-methoxybenzoic acid and m-methoxybenzoic acid.
Concentrated sulfuric acid is used as a catalyst for the esterification of acetic acid in the preparation of isopentyl acetate.
The molar absorptivity for the complex formed between bismuth (III) and thiourea is 9.32 x 103 L mol-1 cm-1 at 470 nm.
A portable photometer with a linear response to radiation registered 73.6 µA with a blank solution in the light path.
A 1.200 M solution of HCl is added to a solution containing 0.150 moles of sodium phosphate (Na3PO4).
I made the Grignard reaction with phenylmagnesiumbromide react with ethyl acetate to give 1,1-diphenylethanol.
The behaviors of acyl chlorides and aldehydes in a reaction with a nucleophile are different.
Esters can be hydrolyzed when heated with water and strong acids or bases- the reverse of Fischer esterification.
Hydrazoic acid, HN3, and butyric acid, HC4H7O2, are both weak monoprotic acids. Their pKa values (at 25oC) are 4.72 and 4.82, respectively.
Consider structures answer questions. Indicate acidic hydrogen molecules. Rank molecules order increasing acidity (least acidic).
Synthesizing ethers via acid-catalyzed condensation reactions has limited usefulness. The conditions (sulfuric acid and heat) are also conducive to elimination.
Draw the Lewis structure for each of the following functional groups: alcohol, ether,aldehyde, ketone, carboxylic acid, ester, amine.
Calculate the concentration of H2O2 from the volume of KMnO4 used and the stoichiometry of the reaction (MW of H2O2 is 34.01).
A cool solution of sodium nitrite and a solution of the amine in an ice bath. Moderately concentrated hydrochloric acid is added.
In clavulanic acid there is a carbon-atom that that has an oxygen-atom, a nitrogen-atom, and a carbon atom attached to it.
Considering the mixture of the two compounds and range of the melting points, the reason recrystallization was difficult was due to a broad melting point range.
Treatment of 3-hexene-2-ol with concentrated HCl gives a mixture of two products, 2-chloro-3-hexene and 4-chloro-2-hexene.
Describe an incident (fire, spill, explosion, etc) you have experienced (or research one on the Internet, professional journal, or scientific magazine article).
The -N(CH3)2 group is an ortho, para director, and strongly activates the ring, whereas the -N(CH3)3 group is a meta director.
Draw abbreviated structural formulae of the products of the complete hydrolysis of lidocaine, and identity the functional groups from the diagram.
How do you tell the difference between the non-polar R group and the polar but neutral R group?
Blood is essentially an aqueous solution but it must transport a variety of non polar substances (hormones for example).
Explain the chemical structure of cortisol and hydrocortisone? What is the difference on the structure?
What type of bonding between amino acid residues is most important in holding a protein and polypeptide in a specific secondary configuration?
Does a mutation causing a substitution of one base pair in a strand of DNA necessarily result in a new amino acid in the protein coded for that gene? Explain.