Answer questions a-c about the Bronsted acid-base reaction below using the identifying letters A-D below eachstructure. The pKa's for the acids of interest are: ammonia (pK, = 36), and acetone (pK, = 19.3)."NH2CHCH3NH3CH3ADacetone enolateamideacetoneammoniaa) The stronger acid isb) Its conjugate base isc) The species that predominate at equilibrium are (two letters, e.g. ac) Answer questions a-c about the Bronsted acid-base reaction below using the identifying letters A-D below eachstructure. The pKa's for the acids of interest are: water (pK= 15.7), and nitroethane (pK = 8.5).онCH,NO2НОНCH5`NO2Ahydroxidenitroethanewaternitroethane aniona) The stronger acid isb) Its conjugate base isc) The species that predominate at equilibrium are (two letters, e.g. ac)

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Answered: Answer questions a-c about the Bronsted…

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter20: Carboxylic Acids And Nitriles

Section20.4: Substituent Effects On Acidity

Problem 9P

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Malic acid (H,CHO) derives its name from the genus name for apples (Malus), from which it was first isolated. It is the main acid in many fruits (including apricots, cherries, peaches and pears) and is widely used as a food additive to enhance sweetness or tartness. Malic acid is a diprotic acid with pK 3.40 and pK, = 5.11 at 25°C. !3! al Calculate the following for a o.20 M malic acid solution at 25°C. pH= %3D [HC,H 0,]= [HC,H,O,1=
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
CH30 carboxylic acid CH3C-OH ester 0 0 CH3COČCH, anhydride CH3CH2CHËI amide CH2CH3 CH3CH2CHCOCI none of the above ČH2CH3 Cengage Learning | Cengage Technical Support e y-axis and pH on the x-axis. If the points stv N IVUL 4IL VL LLIV VM t
Answer questions a-c about the Bronsted acid-base reaction below using the identifying letters A-D below each structure. The pka's for the acids of interest are: ethanol (pK₂ = 16.0), and hydrogen cyanide (pK₂=9.3). Question 8a H-CN hydrogen cyanide B ethoxide :CN с cyanide a) The stronger base is b) Its conjugate acid is c) The species that predominate at equilibrium are (two letters, e.g. ac) D ethanol
What is the approximate pKa value of acetic acid? Is it protonated or not at pH -10? At pH 7? Please explain your answer.
[References] Answer questions a-c about the Bronsted acid-base reaction below using the identifying letters A-D below each structure. The pka's for the acids of interest are: phenol (pka = 9.9), and carbonic acid (pKa = 6.4). OH A phenol B bicarbonate C phenoxide OH D carbonic acid a) The stronger acid is b) Its conjugate base is c) The species that predominate at equilibrium are (two letters, e.g. ac)
G.128.
6
conjugate base acid Consider the reaction AH + H2O 5 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
Calculate pk, values for the following acids. (Enter your answer to three significant figures.) a. Hydrocyanic acid, HCN (K₂ = 4.90x10-10): b. Ethanol (K = 1.00×10-16):

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