Domanda del libro di testo
Write equations showing how each weak base ionizes water to form OH–. Also write the corresponding expression for Kb. b. C6H5NH2
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Ch.16 - Acids and Bases
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831
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TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving136
- Ch.2 - Atoms & Elements112
- Ch.3 - Molecules, Compounds & Chemical Equations159
- Ch.4 - Chemical Quantities & Aqueous Reactions140
- Ch.5 - Gases118
- Ch.6 - Thermochemistry106
- Ch.7 - Quantum-Mechanical Model of the Atom62
- Ch.8 - Periodic Properties of the Elements103
- Ch.9 - Chemical Bonding I: The Lewis Model104
- Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory89
- Ch.11 - Liquids, Solids & Intermolecular Forces73
- Ch.12 - Solids and Modern Material59
- Ch.13 - Solutions110
- Ch.14 - Chemical Kinetics140
- Ch.15 - Chemical Equilibrium78
- Ch.16 - Acids and Bases155
- Ch.17 - Aqueous Ionic Equilibrium176
- Ch.18 - Free Energy and Thermodynamics108
- Ch.19 - Electrochemistry118
- Ch.20 - Radioactivity and Nuclear Chemistry82
- Ch.21 - Organic Chemistry150
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831Non è quello che usi tu?Cambia libro di testo
Capitolo 16, Problema 87
Write equations showing how each weak base ionizes water to form OH–. Also write the corresponding expression for Kb. a. NH3 b. HCO3– c. CH3NH2
Guida verificata passo dopo passo1
Identify the weak base and its reaction with water. For each base, write the chemical equation showing the base accepting a proton from water to form its conjugate acid and hydroxide ion (OH^-).
For NH_3, write the equation: NH_3 + H_2O \(\rightleftharpoons\) NH_4^+ + OH^-.
For HCO_3^-, write the equation: HCO_3^- + H_2O \(\rightleftharpoons\) H_2CO_3 + OH^-.
For CH_3NH_2, write the equation: CH_3NH_2 + H_2O \(\rightleftharpoons\) CH_3NH_3^+ + OH^-.
Write the expression for the base dissociation constant (K_b) for each reaction. For example, for NH_3, K_b = \(\frac{[NH_4^+][OH^-]}{[NH_3]}\) and similarly for the others.
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Ionization of Weak Bases
Weak bases partially ionize in water, meaning they do not completely dissociate into ions. For example, ammonia (NH3) reacts with water to form ammonium (NH4+) and hydroxide ions (OH–). This process is essential for understanding how weak bases contribute to the pH of a solution and the formation of hydroxide ions.
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Percorso guidato
01:00
Calculating Percent Ionization of Weak Bases
Equilibrium Constant (Kb)
The base dissociation constant (Kb) quantifies the strength of a weak base in solution. It is defined as the ratio of the concentration of the products (the ions formed) to the concentration of the reactants (the un-ionized base) at equilibrium. A higher Kb value indicates a stronger weak base, which ionizes more in water.
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Percorso guidato
01:14Equilibrium Constant K
Hydrolysis Reaction
Hydrolysis reactions occur when a base reacts with water to produce hydroxide ions. In the context of weak bases, this reaction is crucial for determining the pH of the solution. For example, when bicarbonate (HCO3–) acts as a weak base, it accepts a proton from water, leading to the formation of carbonate (CO3^2–) and hydroxide ions (OH–).
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Percorso guidato
01:30Alcohol Reactions: Dehydration Reactions
Pratica correlata
Domanda del libro di testo
Write equations showing how each weak base ionizes water to form OH–. Also write the corresponding expression for Kb. c. C2H5NH2
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Domanda del libro di testo
Write equations showing how each weak base ionizes water to form OH–. Also write the corresponding expression for Kb. a. CO32–
951
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