Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Textbook Question
Chapter 20.SE, Problem 39AP
Calculate the Ka's for the following acids:
(a) Citric acid, pKa = 3.14
(b) Tartaric acid, pKa = 2.98
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Students have asked these similar questions
Calculate Ka values from the following pKa’s:(a) Acetone, pKa 5 19.3 (b) Formic acid, pKa 5 3.75
I mostly need help setting up how to do the math for these problems. I also need help with knowing how to find which acid is the strongest.
Give the Ka or pKa values that should be entered in the blanks below. pKa = -log10ka ; Ka = 10-pKa
(a) hydrocyanic acid: Ka = 4.92 x 10-10 ; pKa =
(b) acetic acid: Ka = ; pKa = 4.75
(c) lactic acid: Ka = 8.40 x 10-4 ; pKa =
(d) formic acid: Ka = ; pKa = 3.75
(e) Which of these acids is the strongest?
(Q25) A buffer solution is prepared by adding 0.797 moles of formic acid and 0.866 moles of
sodium formate. What will the solution pH be if 0.228 moles of sodium hydroxide (NaOH) is
added to the buffer solution? The Ką of formic acid is 1.8 x 104.
Chapter 20 Solutions
Organic Chemistry
Ch. 20.1 - Give IUPAC names for the following compounds:Ch. 20.1 - Draw structures corresponding to the following...Ch. 20.2 - Prob. 3PCh. 20.2 - The Ka for dichloroacetic acid is 3.32 Ă— 10-2....Ch. 20.3 - Calculate the percentages of dissociated and...Ch. 20.4 - Which would you expect to be a stronger acid, the...Ch. 20.4 - Dicarboxylic acids have two dissociation...Ch. 20.4 - The pKa of p-cyclopropylbenzoic acid is 4.45. Is...Ch. 20.4 - Prob. 9PCh. 20.5 - Prob. 10P
Ch. 20.6 - Prob. 11PCh. 20.6 - How might you carry out the following...Ch. 20.7 - Prob. 13PCh. 20.7 - Prob. 14PCh. 20.8 - Cyclopentanecarboxylic acid and...Ch. 20.8 - Prob. 16PCh. 20.SE - Prob. 17VCCh. 20.SE - Prob. 18VCCh. 20.SE - The following carboxylic acid can’t be prepared...Ch. 20.SE - Electrostatic potential maps of anisole and...Ch. 20.SE - Predict the product(s) and provide the mechanism...Ch. 20.SE - Predict the product(s) and provide the mechanism...Ch. 20.SE - Prob. 23MPCh. 20.SE - Predict the product(s) and provide the complete...Ch. 20.SE - Acid-catalyzed hydrolysis of a nitrile to give a...Ch. 20.SE - Prob. 26MPCh. 20.SE - Naturally occurring compounds called cyanogenic...Ch. 20.SE - 2-Bromo-6, 6-dimethylcyclohexanone gives 2,...Ch. 20.SE - Naturally occurring compounds called terpenoids,...Ch. 20.SE - In the Ritter reaction, an alkene reacts with a...Ch. 20.SE - Give IUPAC names for the following compounds:Ch. 20.SE - Prob. 32APCh. 20.SE - Prob. 33APCh. 20.SE - Prob. 34APCh. 20.SE - Prob. 35APCh. 20.SE - Prob. 36APCh. 20.SE - Prob. 37APCh. 20.SE - Prob. 38APCh. 20.SE - Calculate the Ka's for the following acids: (a)...Ch. 20.SE - Thioglycolic acid, HSCH2CO2H, a substance used in...Ch. 20.SE - Prob. 41APCh. 20.SE - Prob. 42APCh. 20.SE - How could you convert butanoic acid into the...Ch. 20.SE - How could you convert each of the following...Ch. 20.SE - How could you convert butanenitrile into the...Ch. 20.SE - How would you prepare the following compounds from...Ch. 20.SE - Prob. 47APCh. 20.SE - Using 13CO2 as your only source of labeled carbon,...Ch. 20.SE - Prob. 49APCh. 20.SE - Which method-Grignard carboxylation or nitrile...Ch. 20.SE - Prob. 51APCh. 20.SE - Prob. 52APCh. 20.SE - Propose a structure for a compound C6H12O2 that...Ch. 20.SE - Prob. 54APCh. 20.SE - How would you use NMR (either 13C or 1H) to...Ch. 20.SE - Prob. 56APCh. 20.SE - A chemist in need of 2,2-dimethylpentanoic acid...Ch. 20.SE - Prob. 58APCh. 20.SE - Prob. 59APCh. 20.SE - Prob. 60APCh. 20.SE - Prob. 61APCh. 20.SE - Prob. 62APCh. 20.SE - Prob. 63APCh. 20.SE - The following pKa values have been measured....Ch. 20.SE - Identify the missing reagents a-f in the following...Ch. 20.SE - Propose a structure for a compound, C4H7N, that...Ch. 20.SE - Prob. 67APCh. 20.SE - The 1H and 13C NMR spectra below belong to a...Ch. 20.SE - Propose structures for carboxylic acids that show...Ch. 20.SE - Carboxylic acids having a second carbonyl group...
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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
- What is the ratio of base [A] to acid [HA] at pH 4, 5, 6 and 7 for an acid with a pka of 6?arrow_forwardGive the Ka or pKą values that should be entered in the blanks below. pka = -log10 Ka; Ka = 10-pka (a) hydrocyanic acid: Ka = 4.92 x 10-10; pka = (b) acetic acid: Ka=;pka = 4.75 (c) lactic acid: Ka = 8.40 x 10-4; pka = (d) formic acid: Ka=;pKa = 3.75. (e) Which of these acids is the strongest?arrow_forwardcalculate the Keq for the following reactions from the pKa’s given. State whether the reaction is exergonic or endergonic.arrow_forward
- What is the pKa of a weak acid with a Ka of 4.7 X 10-6?arrow_forward(Q11) lodic acid (HIO3) is a relatively strong weak acid (Ka = 0.17). What will be the equilibrium pH of a solution that has an initial concentration of 0.0122 M in iodic acid?arrow_forwardMost of the pKa values given in this text were determined in water. How would the pKa values of carboxylic acids, alcohols, ammonium ions (RNH32) , phenol, and an anilinium ion (C6H5NH32) change if they were determined in a solvent less polar than water?arrow_forward
- Which is a stronger acid: one with a pKa of 5.2 or one with a pKa of 5.8?arrow_forwardA naturally occurring amino acid such as alanine has a group that is a carboxylic acid and a group that is a protonated amine. The pKa values of the two groups are shown.(a). If the pKa value of a carboxylic acid such as acetic acid is about 5, then why is the pKa value of the carboxylic acid group of alanine so much lower? (b). Draw the structure of alanine in a solution at pH = 0. (c). Draw the structure of alanine in a solution at physiological pH (pH 7.4).(d). Draw the structure of alanine in a solution at pH = 12. (e). Is there a pH at which alanine is uncharged (that is, neither group has a charge)? (f) At what pH does alanine have no net charge (that is, the amount of negative charge is the same as the amount of positive charge)?arrow_forwardConjugate acid base pKa 2) Consider the reaction B: () + H3O+ →>> BH(+) + H2O. For the following named bases: 1) draw the structure of the base, 2) draw the structure of the conjugate acid, 3) give the name of the conjugate acid, and 4) give the approximate pKa of the conjugate acid (±1 pKa unit). For the purposes of answering this question you may use pKa values evenly divisible by 5. t-Butoxide anion p-Toluenesulfonate anion Triethylamine t-Butanol pKa pKa pKaarrow_forward
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