Concept explainers
(a)
Interpretation:
The stronger base between Cl- and H2O should be determined.
Concept Introduction :
For a strong acid, equilibrium lies far to the right. That means almost all the acid molecules are dissociated at the equilibrium and solution contains the free ions. For a weak acid, the equilibrium lies far to the left. That means most of the acid molecules are still present as acid molecules and dissociated to a very small extent.
(b)
Interpretation:
The stronger base between H2O and NO2-should be determined.
Concept Introduction :
For a strong acid, equilibrium lies far to the right. That means almost all the acid molecules are dissociated at the equilibrium and solution contains the free ions. For a weak acid, the equilibrium lies far to the left. That means most of the acid molecules are still present as acid molecules and dissociated to a very small extent.
(c)
Interpretation:
The stronger base between CN-and OC6H5- should be determined.
Concept Introduction :
For a strong acid, equilibrium lies far to the right. That means almost all the acid molecules are dissociated at the equilibrium and solution contains the free ions. For a weak acid, the equilibrium lies far to the left. That means most of the acid molecules are still present as acid molecules and dissociated to a very small extent.
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EBK WEBASSIGN FOR ZUMDAHL'S CHEMICAL PR
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- Which is the stronger of the following two acids? (a) acetic acid, CH3CO2H, Ka = 1.8 105 (b) chloroacetic acid, ClCH2CO2H, pKa = 2.85arrow_forwardWhich acid has the strongest conjugate base? (a) HNO2 (b) C6H5CO2H (c) HCN (d) HClarrow_forwardHow is acid strength related to the value of Ka? What is the difference between strong acids and weak acids (see Table 13-1)? As the strength of an acid increases, what happens to the strength of the conjugate base? How is base strength related to the value of Kb? As the strength of a base increases, what happens to the strength of the conjugate acid?arrow_forward
- What is the conjugate acid of each of the following? What is the conjugate base of each?. (a) OH-. (b) H2O. (c) HCO3-. (d) NH3. (e) HSO4-. (f) H2O2. (g) HS-. (h) H5N2+arrow_forwardSeveral acids and their respective equilibrium constants are: Which is the strongest acid? Which is the weakest acid? Which acid has the weakest conjugate base? Which acid has the strongest conjugate base?arrow_forwardWhat is the conjugate acid of each of the following? What is the conjugate base of each?. (a) H2S. (b) H2 PO4-. (c) PH3. (d) HS-. (e) HSO3-. (f) H3O2+. (g) H4N2. (h) CH3OHarrow_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_forwardPlace the species in each of the following groups in order of increasing acid strength. a. H2O, H2S, H2Se (bond energies: HO, 467 kJ/mol; HS, 363 kJ/mol; HSe, 276 kJ/mol) b. CH3CO2H, FCH2CO2H, F2CHCO2H, F3CCO2H c. NH4+, HONH3+ d. NH4+, PH4+ (bond energies: NH, 391 kJ/mol; PH, 322 kJ/mol) Give reasons for the orders you chose.arrow_forwardConsider the following four biological solutions: (1) bile, pH 8.0, (2) blood, pH 7.4, (3) urine, pH 6.0, and (4) gastric juice, pH 1.6. a. Which solution has the lowest [H3O+]? b. Which solution has the lowest [OH]? c. List the solutions in order of decreasing acidity. d. List the solutions in order of increasing basicity.arrow_forward
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