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Concept explainers
Interpretation:
The polarity should be determined given the 2-Butanone and 2-heptanone and whether it is soluble or insoluble in water it should be explained.
Concept Introduction:
Polarity: It is a well separation of electric charge leading to a molecule or chemical compounds having an electrical dipole moment. Generally the polar molecules must contain polar bonds due to a different in electronegative between the bonded atoms.
Solubility: The general rule that in solubility is like dissolve like, in other words, polar compounds dissolve in polar solvents, and non-polar compounds dissolve in non-polar solvents.
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Chapter 15 Solutions
Fundamentals of General, Organic, and Biological Chemistry, Books a la Carte Plus Mastering Chemistry with Pearson eText -- Access Card Package (8th Edition)
- Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =arrow_forwardPropanamide and methyl acetate have about the same molar mass, both are quite soluble in water, and yet the boiling point of propanamide is 486 K, whereas that of methyl acetate is 330 K. Explain.arrow_forwardThe free energy of hydrolysis for acetic anhydride is221.8 kJ/ mol. The conversion of ATP to ADP also involvesthe cleavage of an anhydride bond. Its free energy of hydrolysis is 230 kJ/ mol. Explain the difference in these values.arrow_forward
- A decapeptide has the following acid composition; Al2,Arg,Cys,Glu,Leu,Phe,Val Partial hydrolysis yield the following tripeptides; Cys-Glu-Leu+Gly-Arg-Cys+Leu-Ala-Ala+Lys-Val-Phe-Gly Reaction of the decapeptide with 2,4-dinitrofluorobenzene yields 2,4-dinitrophenylysine. From the experimental data, deduce the primary structure of the decapeptide. Suggest a scheme you will follow to synthesize the dipeptide Ala-Gly.arrow_forwardDraw the structure of two different aldohexoses that yield the followingaldaric acid when oxidized with HNO3. Use Figure to name eachaldohexosearrow_forwardThis is the structure of 2,4-dimethyl-1-pentanol.arrow_forward
- Cellulose is virtually insoluble in water, whereas amylose isrelatively soluble. Compare their structures and explain thisdisparity in solubility.arrow_forwardWhy do ketoses go dehydration reaction much faster than aldoses in Seliwanoff’s test when aldehyde reacts faster than ketoses? Kindly explain in a comprehensive manner.arrow_forwardThe sugar alcohol often used in “sugarless” gums and candies is Lsorbitol. Much of this alcohol is prepared by reduction of Dglucose. Compare these two structures and explain how this can bearrow_forward
- Acetocholinesterase is an enzyme possessing a single active site that metabolizesacetylcholine with a turn over number of 1.4 x 10^4s-1. How many grams of acetylcholine(molecular formula C7NO2H16+) will 2.16 x 10^-6 g acetocholinesterase metabolize in 60minutes? (The enzyme’s molecular mass is 4.2 x 10^4 g/mol).arrow_forwardPsilocybin is a natural product of psychotropic "magic" mushrooms and has the Following structure: HO HO O=0 Psilocybin The pK a Of the first phosphate oxygen is 1.3, the pK. Of the second phosphate oxygen is 6.2, And the pKa Of the tertiary amine is 10.4. What is the average charge of psilocybin when Dissolved in your carbonic acid buffer of pH=6?arrow_forwardThe pk, values for the carboxy and ammonium protons of phenylalanine are 2.58 and 9.24, respectively. What is the isoelectric point of phenylalanine? Draw the structure of phenylalanine at its isoelectric point.arrow_forward
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