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Concept explainers
Interpretation:
It should be explained that the ascorbic acid
Concept introduction:
Acid - ionization constant
Acids ionize in water. Strong acids ionize completely whereas weak acids ionize to some limited extent.
The degree to which a weak acid ionizes depends on the concentration of the acid and the equilibrium constant for the ionization.
The ionization of a weak acid
The equilibrium expression for the above reaction is given below.
Where,
Smaller value of
Equilibrium in all acid – base reactions favours formation of the weaker base or weaker acid.
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Chapter 17 Solutions
OWLv2 with MindTap Reader, 1 term (6 months) Printed Access Card for Brown/Iverson/Anslyn/Foote's Organic Chemistry, 8th Edition
- Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 is 4.10 and pKa2 is 11.79. When 125 mL of a solution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 4.14 g. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. i I M What was the pH of the ascorbic acid solution before it was evaporated? pH = i What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated? i Marrow_forwardIn a 0.28 mM aqueous solution of trimethylacetic acid (C4H9CO2H), what is the percentage of trimethylacetic acid that is dissociated?arrow_forwardNaOH (aq) +KHC8H4O4 =aq)NaKC8H4O4 (aq) + H2O (l) balncearrow_forward
- Write the products of the reaction of diphenhydramine (a base) with the acid HCI shown below. H COCH₂CH₂NCH3 + HC1 CH3 Consider the chemical reaction from the previous question. Are the reactants or products more soluble in water? Briefly explain.arrow_forwardarrange the following compound types in order of decreasing ease of hydrolysis: acid halides, acid anhydrides, esters, and amides. Use > in your arrangement.arrow_forwarda) If the pH value of an aqueous solution of trimethylamine [(CH3) 3N] is 10.75, what should be the molarity of this solution? (CH3) 3N + H2O ↔ (CH3) 3NH + + OH-, Kb = 6.3 × 10-5 b) What will be the pH of the solution prepared by dissolving 8.35 g of aniline hydrochloride (C6H5NH3 + Cl-) in 750 mL of 0.215 M aniline (C6H5NH2)? Is this solution an effective buffer? Explain (Kb = 7.4 × 10-10 for aniline, C: 12.0 g / mol, H: 1.0 g / mol, N: 14.0 g / mol, Cl: 35.4 g / mol) .arrow_forward
- The normal pH range for blood plasma is 7.35–7.45. Under these conditions, would you expect the carboxyl group of lactic acid (pKa 3.08) to exist primarily as a carboxyl group or as a carboxylic anion? Explain.arrow_forwarda) If the pH value of an aqueous solution of trimethylamine [(CH3)3N] is 10.75, what should be the molarity of this solution? (CH3)3N + H2O ↔ (CH3)3NH+ + OH-, Kb = 6,3 × 10-5 b) What will be the pH of the solution prepared by dissolving 8.35 g of aniline hydrochloride (C6H5NH3+Cl-) in 750 mL of 0.215 M aniline (C6H5NH2)? Is this solution an effective buffer? Explain (Kb = 7,4 × 10-10 for aniline, C: 12.0 g / mol, H: 1.0 g / mol, N: 14.0 g / mol, Cl: 35.4 g / mol) .arrow_forwardWrite the chemical equation for a pentanoate ion acting as base when it reacts with hydrochloric acid (HCI). Which is formula of this rule of reaction?arrow_forward
- Explain why CH3 CH2 CH2NH2 is a Brønsted base. Its water solutions are basic. All substances containing nitrogen atoms are Brønsted bases. This amine is a proton donor. This amine can ассеpt a proton from a proton donor.arrow_forwardBriefly, but clearly, explain why the –OH hydrogen in acetic acid (CH3CO2H) is more acidic than in ethanol (C2H5OH).arrow_forwardRank ethanol, methylamine, and acetic acid in decreasing order of acidity. Ineach case, show the equation for the reaction with a generic base (B:-) to give the conjugate base.arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning
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