Concept explainers
Use a calculator when necessary to answer the following questions.
a. What is the
b. What is the
Want to see the full answer?
Check out a sample textbook solutionChapter 2 Solutions
Connect Online Access 1-Semester for Organic Chemistry
- Which has the larger numerical value? (a) The pKa of a strong acid or the pKa of a weak acid (b) The Ka of a strong acid or the Ka of a weak acidarrow_forwardFor each value of Ka, calculate the corresponding value of pKa. Which compound is the stronger acid? (a) Acetic add, Ka = 1.74 105 (b) Chloroacetic acid, Ka= 1.38 103arrow_forwardWhat are the products of each of the following acid-base reactions? Indicate the acid and its conjugate base and the base and its conjugate acid. HC1O4+ H2O — NH/ + H2O -» HCOr + OH" —arrow_forward
- Using the Ka values in Table 14.2, calculate the percent dissociation in a 0.20-M solution of each of the following acids. a. nitric acid (HNO3) b. nitrous acid (HNO2) c. phenol (HOC6H5) d. How is percent dissociation of an acid related to the Ka value for the acid (assuming equal initial concentrations of acids)?arrow_forwardCalculate Ka for the weak acids that have the following PKa values. (a) 3.9(b) 10.12 (c) 13.07arrow_forwardDefine or illustrate the meaning of the following terms: a. Ka reaction b. Ka equilibrium constant c. Kb reaction d. Kb equilibrium constant e. conjugate acidbase pairarrow_forward
- Sulfanilic acid, which is used in making dyes, is made by reacting aniline with sulfuric acid. (a) Is aniline a Brnsted base, a Lewis base, or both? Explain, using its possible reactions with HCl, BF3, or other acid. (b) Sulfanilic acid has a pKa value of 3.23. The sodium salt of the acid, Na(H2NC6H4SO3), is quite soluble in water. If you dissolve 1.25 g of the salt in water to give 125 ml, of solution, what is the pH of the solution?arrow_forwardConsider these acids (a) Arrange the acids in order of increasing acid strength from weakest to strongest. (b) Which acid has the smallest pKa value?arrow_forwardLactic acid, CH3CH(OH)COOH, is a weak monoprotic acid with a melting point of 53 C. It exists as two enantiomers (Sec. 7-2f) that have slightly different Ka values. The D form has a Ka of 1.5 104 and the L form has a Ka of 1.6 104. The D form is synthesized by some bacteria. The L form is produced in muscle cells during anaerobic metabolism in which glucose molecules are broken down into lactic acid and molecules of adenosine triphosphate (ATP) are formed. When lactic acid builds up too rapidly in muscle tissue, severe pain results. (a) Which form of lactic acid (D or L) is the stronger acid? Explain your answer. (b) Determine the pKa that would be measured for a 50:50 mixture of the two forms of lactic acid in aqueous solution, pKa = log Ka (c) A solution of D-lactic acid is prepared. Use HL as a general formula for lactic acid, and write the equation for the ionization of lactic acid in water. (d) If 0.100-M solutions of these two acids (D and L) were prepared, calculate what the pH of each solution would be. (e) Before any lactic acid dissolves in the water, what reaction determines the pH? (f) Calculate the pH of a solution made by dissolving 4.46 g D-lactic acid in 500. mL of water. (g) Calculate the volume (mL) of 1.15-M NaOH(aq) required to completely neutralize 4.46 g of pure lactic acid. (h) Calculate the pH of the solution when exactly enough NaOH was added to neutralize all of the lactic acid for (i) the D form; (ii) the L form; and (iii) a 50:50 mixture of the two forms.arrow_forward
- Acid Base Reaction Consider the following acid-base reaction. HSO4 + CN-HCN + SO4²- Which compound is the conjugate base of the Bronsted-Lowry acid? HCN HSO4 CN SO4²- 0 0 0 0 ξ0000 Which compound is the conjugate acid of the Bronsted-Lowry base? CN SO4²- HSO4 HCN Darrow_forwardAnswer letter a and b pls.arrow_forwardWhat is the K a of an acid whose pK a is 8.60?arrow_forward
- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningOrganic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning