Concept explainers
(a)
Interpretation: The reason why the first
Concept introduction:
Mixture of acid and base undergoes equilibrium reaction and it’s
Weak acids are more stable and less reactive, so equilibrium follows the direction of formation weak acids in a reaction.
Lesser the
Electronegativity: The chemical behavior of an atom where it attracts the shared electron pair to itself.
If hydrogen atoms in a compound are replaced by electronegative atoms, it causes inductive electron withdrawal. It stabilizes its conjugate base thus increases the strength of the acid.
(b)
Interpretation: The reason why the first
Concept introduction:
Mixture of acid and base undergoes equilibrium reaction and it’s
Weak acids are more stable and less reactive, so equilibrium follows the direction of formation weak acids in a reaction.
Lesser the
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ORGANIC CHEMISTRY-W/S.G+SOLN.MANUAL
- Explain why a pKa is not found for the strong acid, but one will be found for the weak acid.arrow_forwardGiven the following information determine which of these acids is the strongest? Ka for boric acid is 7.3 x 10–10 pKa of acetic acid is 4.75 Ka for lactic acid is 8.4 x 10–4 pKa of phenol is 9.89 A acetic acid B formic acid C lactic acid D phenolarrow_forwardUsing the table of pKa values given in Appendix I, answer the following: a. Which is the most acidic organic compound in the table? b. Which is the least acidic organic compound in the table? c. Which is the most acidic carboxylic acid in the table? d. Which is more electronegative: an sp3 oxygen or an sp2 oxygen? (Hint: Pick a compound in Appendix I with a hydrogen attached to an sp2 oxygen and one with a hydrogen attached to an sp3 oxygen and compare their pKa values.) e. Which compounds demonstrate that the relative electronegativities of a hybridized nitrogen atom are sp 7 sp2 7 sp3?arrow_forward
- 7. Determine the K₁ of each of the following. a. A 0.00475 M solution of acid HY has a pH of 2.68. What is the Ka of HY? b. CICH₂COOH has a pKa of 2.87, what is the Ka of the acid? c. A base has a pKb of 5.14, what is the Ka of the conjugate acid? d. A 0.25 M solution of a weak acid is 3% dissociated, what is the Ka of the acid?arrow_forwardThis question is concerning the amino acid methionine. a. Draw methionine in a way such that every atom has a zero charge. b. Draw methionine in a way such that the overall molecule has a zero charge. c. Draw methionine as it would appear in a solution with a pH higher than its isoelectric point. d. Draw methionine as it would appear in a solution with a pH lower than its isoelectric point.arrow_forwardDraw each and add pkaarrow_forward
- An acid has a Ka = 7.77 x 10-4. Is it stronger or weaker than an acid with Ką = 7.77 x 10-3 ? A. stronger B. weaker C. the samearrow_forwardWhich species is the conjugate acid of ammonia, NH3? Select one: O a. HẠN O b. H3N* О с. НN O d. HẠN* Which compound has the lowest pk,? Select one: O a. H2O O b. H2S NH3 O d. CH4 Which compound is the strongest acid? CH4 CH,CH3 H2C=CH2 HCECH II IV Select one: O a. Ob. О с. II O d. IVarrow_forwardThe pKa of three C – H bonds is given below. a. For each compound, draw the conjugate base, including all possible resonance structures. b. Explain the observed trend in pKa.arrow_forward
- Name of the added reagent in test for P. * Your answerarrow_forwardTwo pKa values are reported for malonic acid, a compound with two COOH groups. Explain why one pKa is lower and one pKa is higher than the pKa of acetic acid (CH3COOH, pKa = 4.8).arrow_forward4. Nitromethane (CH³NO₂) has a pKa value of 10. Does this mean that the nitro group (NO₂) is an electron withdrawing group or an electron donating group? Explain. :O: C -I H pka 10arrow_forward
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co