conjugate base acid Consider the reaction AH + H₂O → A: + H3O+. For the following named acids: a) draw the structure of the acid, b) give the approximate pKa value of the acid in multiples of 5, and c) draw the structure of the conjugate base. pKa sec-Butyl ammonium ion Cyclohexanone pKa iso-Butyl alcohol pka N-ethylcarbamic acid pKa

conjugate base acid Consider the reaction AH + H₂O → A: + H3O+. For the following named acids: a) draw the structure of the acid, b) give the approximate pKa value of the acid in multiples of 5, and c) draw the structure of the conjugate base. pKa sec-Butyl ammonium ion Cyclohexanone pKa iso-Butyl alcohol pka N-ethylcarbamic acid pKa

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter27: Amines

Section: Chapter Questions

Problem 7E

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1a) Consider the reaction AH(+) + H₂O A: + H3O+). For the following named acids: a) draw the structure of the acid, b) give the approximate pKa of the conjugate acid in units of 5, c) give the name of the conjugate base, and d) draw the structure of the conjugate base. p-Toluenesulfonic acid acid Conjugate base Imidazolium cation pka_ pKa iso-Propanol pKa Acetylene pKa
For each value of Ka, calculate the corresponding value of pKa. Which compound is the stronger acid? Q.) chloroacetic acid, Ka = 1.38 X 10-3
Low-molecular-weight dicarboxylic acids normally exhibit two different pK, values. Ionization of the first carboxyl group is easier than the second. This effect diminishes with molecular size, and for adipic acid and longer chain dicarboxylic acids, the two acid ionization constants differ by about one pK unit. Dicarboxylic Acid Structural Formula pK,2 a1 Охalic НООССООН 1.23 4.19 Malonic НООСCH,COOH 2.83 5.69 Succinic HOOC(CH,),COOH 4.16 5.61 Glutaric HOOC(CH,),COOH 4.31 5.41 Adipic HOOC(CH,),COOH 4.43 5.41 Why do the two pK, values differ more for the shorter chain dicarboxylic acids than for the longer chain dicarboxylic acids?
1) Consider the reaction AH+ H₂O A:+H3O¹. For the following named acids: 1) draw the structure of the acid, 2) give the approximate pKa value of the acid in multiples of 5, 3) give the name of the conjugate base, and 4) draw the structure of the conjugate base. m-Chlorophenol 3-Pentanone acid Conj. base acid Conj. base pKa Benzoic acid pka_ iso-Butyl ammonium ion pka_ Diethyl Malonate pka_ Benzyl oxonium ion pka_ 1-pentyne pKa pKa Ethyl Acetate pKa
(a) Given that Ka for acetic acid is 1.8 x 10-5 and that forhypochlorous acid is 3.0 x 10-8, which is the stronger acid?(b) Which is the stronger base, the acetate ion or the hypochloriteion? (c) Calculate Kb values for CH3COO- and ClO-.
Use the information in the pK table to rank the molecules in order of decreasing basicity. For example, select "1" in the second column for the strongest base a and "2" for the next strongest base and so on. CH3 HS F CH,CO, Molecules (Choose one) (Choose one) (Choose one) (Choose one) X Ś CHA 4 NH₂ H₂ CH3NH₂ 2 48 38 36 33 pk table pKa CH,NH, CH₂SH 10.4 H₂O* HCN + 10.6 9.4 NH H₂O 15.7 H₂S CH₂OH 15.5 CH,CO,H 4.76 9.2 7.00 HF CH₂OH₂ H₂SO4 HC1 HBr 3.17 -1.7 -2.2 -3.0 -7 -9
Phosphoric acid (H3PO4) has 3 dissociable protons with the pKa values shown. Which form of phosphoric acid predominates in a solution at pH 4? Explain. Acid pKa H3PO4 2.14 H2PO4- 6.86 HPO42- 12.4
Question 3 What must be the minimum concentration of cyanoacetic acid in 1.00L buffer solution of a pH 2.07 cyanoacetic acid/sodium cyanoacetate buffer if the pH changes by 0.20 units when 0.072 moles HCl are added? Click here for the table of lonization Constants of Weak Acids.
Shown below is the equilibrium between methylammonia and the methylammonium ion. H H3C-N-H H Methylammonium Ion H H₂C-N: H Methylammonia The pKa of the methylammonium ion is 10.62. At what pH is methylammonia 1/5 ionized? Type your answer...
Consider the data in the table below to answer the following questions: Which of the acids in the table above has the strongest conjugate base? Your answer Acidities of Substituted Benzoic and Acetic Acids pks at 25°C Y Y CIL₂COOT meta H 4.75 4.19 CN 2.47 3.64 OCH, 3.57 4.09 What is the structure of the strongest acid in the table above? Your answer Y CH₂COOH para 4.19 3.55 4.46
Aniline C6H5NH2 has a base dissociation constant (Kb) of 4.3 × 10-10. What is the conjugate acid of aniline and what is its acid dissociation constant (Ka)? (SHOW CALCULATION)
What is the approximate pKa value of acetic acid? Is it protonated or not at pH -10? At pH 7? Please explain your answer.