Answer questions a-c about the Bronsted acid-base reaction below using the identifying letters A-D below each structure. A table of pKa values for various organic and inorganic acids can be found in the references section. CH₂ XI-XI CH OH acetic acid Submit Answer + CH₂ methanesulfonate H-CN + A Submit Answer a) The weaker acid is b) Its conjugate base is c) The species that predominate at equilibrium are (two letters, e.g. AC) hydrogen cyanide с acetate Retry Entire Group 9 more group attempts remaining CH₂ B ethoxide CH₂ Answer questions a-c about the Bronsted acid-base reaction below using the identifying letters A-D below each structure. A table of pKa values for various organic and inorganic acids can be found in the references section. methanesulfonic acid :CN с cyanide OH a) The weaker base is b) Its conjugate acid is c) The species that predominate at equilibrium are (two letters, e.g. AC)[ Ratry Entira Gran 9 more group attempts remaining Click to reset all items in this mastery group. *Note that your response(s) to each item will be cleared, a new version of each item will be presented, and your mastery credit (if any) for this unit will also be cleared. D ethanol Previous

Answer questions a-c about the Bronsted acid-base reaction below using the identifying letters A-D below each structure. A table of pKa values for various organic and inorganic acids can be found in the references section. CH₂ XI-XI CH OH acetic acid Submit Answer + CH₂ methanesulfonate H-CN + A Submit Answer a) The weaker acid is b) Its conjugate base is c) The species that predominate at equilibrium are (two letters, e.g. AC) hydrogen cyanide с acetate Retry Entire Group 9 more group attempts remaining CH₂ B ethoxide CH₂ Answer questions a-c about the Bronsted acid-base reaction below using the identifying letters A-D below each structure. A table of pKa values for various organic and inorganic acids can be found in the references section. methanesulfonic acid :CN с cyanide OH a) The weaker base is b) Its conjugate acid is c) The species that predominate at equilibrium are (two letters, e.g. AC)[ Ratry Entira Gran 9 more group attempts remaining Click to reset all items in this mastery group. *Note that your response(s) to each item will be cleared, a new version of each item will be presented, and your mastery credit (if any) for this unit will also be cleared. D ethanol Previous

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter4: Acids And Bases

Section: Chapter Questions

Problem 4.35AP: The sec-butyl cation can react as both a Brnsted-Lowry acid (a proton donor) and a Lewis acid (an...

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The following reactions illustrate Brnsted acid-base behavior. Complete each equation. a.HI(aq)+?H3O+(aq)+I(aq) b.NH3(l)+?NH4++NH2 c.H2C2O4(aq)+H2O(l)?+HC2O4(aq) d.H2N2O2(aq)+H2O(l)H3O+(aq)+? e.?+H2O(l)H3O+(aq)+CO32(aq)
Answer true or false to the following statements about the mechanism of acid-base reactions. (a) The acid and base must encounter each other by a collision in order for the proton to transfer. (b) All collisions between acids and bases result in proton transfer. (c) During an acid-base reaction the lone pair on the base fills the A-H antibonding sigma orbital.
For oxyacids, how does acid strength depend on a. the strength of the bond to the acidic hydrogen atom? b. the electronegativity of the element bonded to the oxygen atom that bears the acidic hydrogen? c. the number of oxygen atoms? How does the strength of a conjugate base depend on these factors? What type of solution forms when a nonmetal oxide dissolves in water? Give an example of such an oxide. What type of solution forms when a metal oxide dissolves in water? Give an example of such an oxide.
Use Table 13-2 to order the following from the strongest to the weakest acid. HClO2,H2O,NH4+,HClO4
Several acids and their respective equilibrium constants are: Which is the strongest acid? Which is the weakest acid? Which acid has the weakest conjugate base? Which acid has the strongest conjugate base?
The sec-butyl cation can react as both a Brnsted-Lowry acid (a proton donor) and a Lewis acid (an electron pair acceptor) in the presence of a watersulfuric acid mixture. In each case, however, the product is different. The two reactions are as follows: (a) In which reaction(s) does this cation react as a Lewis acid? In which reaction(s) does it react as a Brnsted-Lowry acid? (b) Write Lewis structures for reactants and products and show by the use of curved arrows how each reaction occurs.
2. The molecule whose structure is illustrated here is amphetamine, a stimulant Which description best fits this molecule? (Note: There may be more than one answer.) Brønsted acid Lewis acid Brønsted base Lewis base
1. Which of the following can act as a Lewis acid? (Hint : In each case, draw the Lewis electron dot structure of the molecule or ion. Are there lone pairs of electrons on the central atom? If so, it can be a Lewis base. Does the central atom lack an electron pair? If so, it can behave as a Lewis acid.) PH3 BCl3 H2S HS−
16-27 Guanidine, p/Ca 13.6, is a very strong base, almost as basic as hydroxide ion. NH NH2+ II II H2N—C—NH2 + H2O H2N—C—NH2 + OH" Guanidine Guanidinium ion pKb = 13.6 Complete the Lewis structure for guanidine, showing all valence electrons. The remarkable basicity of guanidine is attributed to the fact that the positive charge on the guanidinium ion is delocalized by resonance over the three nitrogen atoms. This delocalization increases the stability of the guanidinium ion relative to the ammonium ion or substituted ammonium ions. Draw three equivalent contributing structures for the guanidinium ion and show by the use of curved arrows how these three contributors are related. Propose an explanation for the fact that protonation occurs on the C=NH nitrogen rather than on one of the —NH., nitrogens. (Hint: Consider the resonance stabilization of the structure formed by protonation on a —NH., nitrogen compared with the resonance stabilization of the structure formed by protonation on the =NH nitrogen.) Predict the N—C—N bond angles in the hybrid. Which is the stronger acid, the ammonium ion or the guanidinium ion?