ORGANIC CHEMISTRY
5th Edition
ISBN: 9781259977596
Author: SMITH
Publisher: MCG
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Chapter 2, Problem 2.23P
Acetonitrile
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The pKa of ascorbic acid (vitamin C, page 55) is 4.17, showing that it is slightly more acidic than acetic acid (CH3COOH, pKa 4.74). Compare the most stable conjugate base of ascorbic acid with the conjugate base of acetic acid, and suggest why these two compounds have similar acidities, even though ascorbic acid lacks the carboxylic acid (COOH) group.
Draw the skeletal structure of the product(s) for the Lewis acid-base reaction.
Consider the two following nitrophenol structures:
OH
OH
`NO2
NO2
p-nitrophenol
m-nitrophenol
Predict which will be the stronger acid. (Hint: Consider
possible resonance structures analogous to those given in
the text for phenol.)
Chapter 2 Solutions
ORGANIC CHEMISTRY
Ch. 2 - a. Which compounds are Bronsted-Lowry acids:...Ch. 2 - a. Draw the conjugate acid of each base:...Ch. 2 - Label each statement as True or False.
a. is the...Ch. 2 - Label the acid and base, and the conjugate acid...Ch. 2 - Decide which compound is the acid and which is the...Ch. 2 - Draw the products formed from the acid-base...Ch. 2 - Which compound in each pair is the stronger acid?...Ch. 2 - Use a calculator when necessary to answer the...Ch. 2 - Rank the conjugate bases of each of group of acids...Ch. 2 - Problem-2.10 Considers two acids: (formic acid,)...
Ch. 2 - Prob. 2.11PCh. 2 - Draw the products of each reaction and determine...Ch. 2 - Prob. 2.13PCh. 2 - Without reference to a pKa table, decide which...Ch. 2 - Rank the labeled H atoms in the following compound...Ch. 2 - Which hydrogen in each molecule is most...Ch. 2 - Which hydrogen in pseudoephedrine, the nasal...Ch. 2 - Which compound in each pair of isomers is the...Ch. 2 - Which compound in each pair is the stronger acid?...Ch. 2 - Glycolic acid, HOCH2CO2H, is the simplest member...Ch. 2 - Explain the apparent paradox. HBr is a stronger...Ch. 2 - The CH bond in acetone, (CH3)2C=O, has a pKa of...Ch. 2 - Acetonitrile (CH3CN) has a pKa of 25, making it...Ch. 2 - For each pair of compounds: [1] Which indicated H...Ch. 2 - Rank the compounds in each group in order of...Ch. 2 - Which proton in each of the following drugs is...Ch. 2 - Which anion A or B is the stronger base? ABCh. 2 - Prob. 2.28PCh. 2 - Problem 2.29
Compounds like amphetamine that...Ch. 2 - Problem 2.30 Which species are Lewis bases?
a. b....Ch. 2 - Which species are Lewis acids?
a. b. c. d.
Ch. 2 - For each reaction, label the Lewis acid and base....Ch. 2 - Prob. 2.33PCh. 2 - Prob. 2.34PCh. 2 - Label the Lewis acid and base. Use curved arrow...Ch. 2 - 2.36 Propranolol is an antihypertensive agent—that...Ch. 2 - 2.37 Amphetamine is a powerful stimulant of the...Ch. 2 - 2.38 What is the conjugate acid of each base?
a....Ch. 2 - 2.39 What is the conjugate base of each acid?
a....Ch. 2 - 2.40 Draw the products formed from the acid-base...Ch. 2 - Draw the products formed from the acid-base...Ch. 2 - Draw the products of each proton transfer...Ch. 2 - Prob. 2.43PCh. 2 - Prob. 2.44PCh. 2 - What is Ka for each compound? Use a calculator...Ch. 2 - What is the pKa for each compound? a. b. c.Ch. 2 - Which of the following bases are strong enough to...Ch. 2 - Which compounds can be deprotonated by OH, so that...Ch. 2 - Draw the products of each reaction. Use the pKa...Ch. 2 - Rank the following compounds in order of...Ch. 2 - 2.51 Rank the following ions in order of...Ch. 2 - Prob. 2.52PCh. 2 - Prob. 2.53PCh. 2 - 2.54 The of three bonds is given below.
a. For...Ch. 2 - a. What is the conjugate acid of A? b. What is the...Ch. 2 - 2.56 Draw the structure of a constitutional isomer...Ch. 2 - 2.57 Many drugs are Bronsted-Lowry acids or...Ch. 2 - Dimethyl ether (CH3OCH3) and ethanol (CH3CH2OH)...Ch. 2 - 2.59 Atenolol is a (beta) blocker, a drug used to...Ch. 2 - 2.60 Use the principles in Section 2.5 to label...Ch. 2 - 2.61 Label the three most acidic hydrogen atoms in...Ch. 2 - Prob. 2.62PCh. 2 - 2.63 Classify each compound as a Lewis base, a...Ch. 2 - 2.64 Classify each species as a Lewis acid, a...Ch. 2 - Label the Lewis acid and Lewis base in each...Ch. 2 - 2.66 Draw the products of each Lewis acid-base...Ch. 2 - Prob. 2.67PCh. 2 - 2.68 Answer the following questions about the four...Ch. 2 - Prob. 2.69PCh. 2 - 2.70 Hydroxide can react as a Brønsted-Lowry base...Ch. 2 - 2.71 Answer the following questions about esmolol,...Ch. 2 - 2.72 DBU, is a base we will encounter in...Ch. 2 - 2.73 Molecules like acetamide can be protonated...Ch. 2 - Prob. 2.74PCh. 2 - Prob. 2.75PCh. 2 - 2.76 Write a stepwise reaction sequence using...Ch. 2 - Prob. 2.77PCh. 2 - 2.78 Which compound, M or N, is the stronger acid?...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Which of the following two acids has the stronger conjugate base? Nitrous acid, Ka = 7.1 x 10–4 Phenol, Ka = 1.0 x 10–10 The strength of the conjugate base cannot be obtained from the information given. Nitrous acid, because it has a larger Ka value. Nitrous acid, because it has a smaller Ka value. Phenol, because it has a larger Ka value. Phenol, because it has a smaller Ka value.arrow_forwardcomplete the equation for the reaction between each Lewis acid-base pair. In each equation, label which starting material is the Lewis acid and which is the Lewis base; use curved arrows to show the flow of electrons in each reaction. In doing this problem, it is essential that you show valence electrons for all atoms participating in each reactionarrow_forwardThe acid dissociation constant K, of trimethylacetic acid (HC (CH3) CO2 is 9.33 × 10 *. Calculate the pH of a 6.1M solution of trimethylacetic acid. Round your answer to 1 decimal place. PHarrow_forward
- 4. The pk, of vanillin is about 9, which is much more acidic than a normal alcohol. Draw a reaction showing the deprotonation of vanillin with NaOH, and then draw six resonance structures of the conjugate base. Draw the hybrid structure and clearly indicate how the negative charge is distributed in the compound.arrow_forwardWhat is the conjugate acid of H2C6H7O5 -1aq2? What is its conjugate base?arrow_forwardFill in the left side of this equilibrium constant equation for the reaction of diethylmethylamine (C3H13N), a weak base, with water. D= K, oloarrow_forward
- Calculate the pH at 25 °C of a 0.47M solution of ethylammonium bromide (C₂H5NH₂Br). Note that ethylamine (C₂H5NH₂) is a weak base with a p K₁ of 3.19. Round your answer to 1 decimal place. Harrow_forwardThe C-H bond in acetone, (CH3)C=O, has a pką of 19.2. Draw two resonance structures for its conjugate base. Then, explain why acetone is much more acidic than propane, CH;CH,CH3 (pKa = 50). %3Darrow_forwardPredict the position of equilibrium and calculate the equilibrium constant, Keq, for each acid-base reactionarrow_forward
- Calculate the pH of a 0.14 M solution of diethylamine.arrow_forwardPhenol, C6H5OH, is an acidic organic compound for which K₂ = 1.3 x 10-10. The structure of phenol is a benzene ring with an -OH replacing a hydrogen atom on one of its six carbon atoms. Because phenol has this -OH group, you might think that the -OH would ionize and make phenol a base. Actually, the O-H bond is very weak and phenol acts as an acid by ionizing the H* ion. What is the pH of a 0.47 M solution of phenol in water? pH=ễarrow_forwardThe pKa of ascorbic acid (vitamin C, page 55) is 4.17, showing that it is slightly more acidic than acetic acid (CH3COOH, pKa 4.74).Compare the stabilities of these four conjugate bases, and predict which OH group of ascorbic acid is the most acidicarrow_forward
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