Complete the flow chart below to describe the separation of an acid and base mixture by providing the necessary chemical structures. CH3p-toluic acidH₂Nethyl p-aminobenzoatep-toluid acid & ethyl p-aminobenzoate in etherExtract with 0.5 M NaOH twice1. Which molecules are in the aqueous layer?2. Which molecules are in the organic layer?Add 2 M HCI till acidica.3. What is the structure of the precipitated chemical?Provide the chemical structure for question 1 in the flow chart:b. Provide the chemical structure for question 2 in the flow chart:C.Provide the chemical structure for question 3 in the flow chart:

Step 1: Step 2: Step 3: Step 4:

Answered: CH3 p-toluic acid H₂N ethyl…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter31: Introduction To Analytical Separations

Section: Chapter Questions

Problem 31.17QAP

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4
The following titration curve shows the titration of triethylamine (C,H5)3N with hydrochloric acid. Which net ionic reaction explains the pH of the analyte solution before any titrant is added? 12 10 6. PH 4. 1. 10 50 mL of HCI 30 70 90 110 (CH;)3NH"(aq) + H,0(1) (C,Hg)gN(aq) + H3O*(aq) O C,H;)3N(aq) + H3O*(aq) (CH5)3NH*(aq) +OH (aq) (C2H5)3N(aq) + H*(aq) -> (C,H5)3NH"(aq) O H2O(1) H*(aq) + OH (aq) --> (C2H;)3N(aq) + H,0(1) OH (aq) + (CH5)3NH*(aq)
Write the values of Y and X. H2SO4 CH3CH=CH2 + H2O CH;CH-CH2 H HỌ 2-propanol an alcohol The pKa of a protonated alcohol is about -2.5, and the pKa of an alcohol is about 15. Therefore, as long as the pH of the solution is greater than Y and less than X, more than 50% of 2-propanol will be in its neutral, nonprotonated form. Express your answers using two significant figures separated by a comma. AX中 Y, X = %3|
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A microbiologist is preparing a medium on which to cultureE. colibacteria. She buffers the medium at pH 7.00 to minimize the effect of acid-producing fermentation. What volumes ofequimolar aqueous solutions of K₂HPO₄and KH₂PO₄must shecombine to make 100. mL of the pH 7.00 buffer?
What is the pH of a buffer that is 0.12 M in lactic acid [CH3CH(OH)COOH, or HC3H5O3] and 0.10 M in sodium lactate [CH3CH1OH2COONa or NaC3H5O3]?For lactic acid, Ka = 1.4 * 10-4.
Complete solution -Buffer Preparation-
1) When we prepare a glycine solution, why we add 10 ml of 0.20 M KCl a) inceasing the ionization of glycine into ionic species b) render the glycine solution to a buffer capacity c) expose the acidity nature of the carboxylic group 2) the phase equilibria H2O (s) - - - > H2O (l) is established when a) the vapor pressure is lower than atm pressure at equilibrium b) the free energy change of system is less than 0 c) the free energy change is greater than 0 d) the gibbs free energy of both phases are equal
A 100.0 mL solution containing 0.797 g of maleic acid (MW 116.072 g/mol) is titrated with 0.280 M KOH. Calculate the pH of the solution after the addition of 49.0 mL of the KOH solution. Maleic acid has pK, values of 1.92 and 6.27. pH = At this pH, calculate the concentration of each form of maleic acid in the solution at equilibrium. The three forms of maleic acid are abbreviated as H, M, HM, and M2, which represent the fully protonated, intermediate, and fully deprotonated forms, respectively. [M²-] = M. [HM | = %3! [H, M| = %3D
Malonic acid (HO2CCH2CO2H) is a diprotic acid. In the titration of malonic acid w ith NaOH, stoichiometric points occur at pH = 3.9 and 8.8. A 25.00-mL sample of malonic acid of unknown concentration is titrated with 0.0984 M NaOH, requiring 31.50 mL of the NaOH solution to reach the phenolphthalein end point. Calculate the concentration of the initial malonic acid solution. (Sec Exercise 113.)
Amino acids are an important group of compounds. At low pH, both the carboxylic acid group (CO2H) and the amine group (NHR) are protonated. However, as the pH of the solution increases (say, by adding base), the carboxylic acid proton is removed, usually at a pH between 2 and 3. In a middle range of pHs, therefore, the amine group is protonated, but the carboxylic acid group has lost the proton. (This is called a zwitterion.) At more basic pH values, the amine proton is dissociated. What is the pH of a 0.20 M solution of alanine hydrochloride, [NH3CHCH3CO2H]Cl?

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