Concept explainers
When the conjugate acid of aniline, C6H5NH3+, reacts with the acetate ion, the following reaction takes place:
If Kafor C6H5NH3+ is
Interpretation:
The K of the given reaction is to be calculated.
Concept introduction:
The relationship between the concentration of products and reactants at equilibrium for a general reaction:
Where A, B, C, and D represents chemical species and a, b, c, and d are the coefficients for balanced reaction.
The equilibrium expression, Kc for reversible reaction is determined by multiplying the concentrations of products together and divided by the concentrations of the reactants. Every concentration term is raised to the power that is equal to the coefficient in the balanced reaction. So, the expression is:
pH scale is a type of measurement of H+ ion concentration in the solution. It is taken as a negative log of H+ ion concentration as:
For the equilibrium conditions:
Where, ka is acid dissociation constant, kb is base dissociation constant and kw is ionic product of water whose value is fixed as 10-14.
Answer to Problem 28QAP
The required
Explanation of Solution
Given Information:
The conjugate acid of aniline
The reaction is:
The conjugate acid of aniline is a weak acid which dissociates as:
The equilibrium constant expression will be:
Further acetic acid is dissociated as:
Hence, we have:
The equilibrium constant expression will be:
Further when the reactions are added:
The expression is:
The expression can be rearranged as:
Putting the values we get:
The required
Want to see more full solutions like this?
Chapter 22 Solutions
Owlv2, 4 Terms (24 Months) Printed Access Card For Masterton/hurley's Chemistry: Principles And Reactions, 8th
- 16-13 Classify each amino group as primary, secondary, or tertiary and as aliphatic or aromatic. Serotonin (a neurotransmitter) Diphenhydramine (the hydrochloride salt is the antihistamine Benadryl) Lysine (an amino acid)arrow_forwardBecause amines are basic, they can often accept a proton. Draw the protonated structure of n-propylamine.arrow_forwardWhat is the conjugate acid of C2H5NH2?arrow_forward
- H3A is a triprotic acid. What would be the molecular formula of the conjugate acid of HA2-(aq)?arrow_forwardThe pKaa of the conjugate acid of guanidine is 13.6, making it one of the strongest neutral organic bases. Offer an explanation.arrow_forwardThe Ka1 of ascorbic acid is 7.94 x 10-5. Would you expect ascorbic acid dissolved in blood plasma (pH 7.35–7.45) to exist primarily as ascorbic acid or as ascorbate anion? Explain.arrow_forward
- For the following molecule, draw the major species at each pH. The carboxylic acid is drawn as a conjugate acid and the amine are drawn as the conjugate base. 1. pH of 2 2. pH of 4 3. pH of 7arrow_forwardPlease help with 4B 4C 4D and if possible please with 4E as well. I am very confused and if all 4 parts can be answered I would very much appreciate it! Thank you in advance 4E) Formic acid (HCO2H) and piperidine (C5H11N)arrow_forwardUsing pKa Values to Determine Relative Acidity and Basicity Rank the following compounds in order of increasing acidity, and then rank their conjugate bases in order of increasing basicity.arrow_forward
- SO4-2 + Ba (C2H3O2)2 in the presence of HClarrow_forwardWrite the equilibrium-constant expressions and obtainnumerical values for each constant in. (a) the basic dissociation of aniline, C6H5NH2. (b) the acidic dissociation of hypochlorous acid,HClO. (c) the acidic dissociation of methyl ammoniumhydrochloride, CH3NH3Cl. (d) the basic dissociation of NaNO2. (e) the dissociation of H3AsO3to H3O+and AsO33-. (f) the reaction of C2O42-with H2O to give H2C2O4and OH-. show solutionarrow_forwardWhich of the ff statements is false? In aqueous solution the order of base strength R3N > R2NH > RNH2 > NH3. Alkyl groups increase the electron density on nitrogen, making the amine more basic. Alkyl groups stabilize the positive charge on the conjugate acid making the ammonium ion less acidic. Solvation through H-bonding with water is more important in the conjugate acid than in the free amine.arrow_forward
- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningIntroduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningOrganic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning