Domanda del libro di testo
The Kb for methylamine (CH3NH2) at 25 °C is given in Appendix D. (d) What is the value of ΔG when [H+] = 6.7 × 10-9 M, [CH3NH3+] = 2.4 × 10-3 M, and [CH3NH2] = 0.098 M?
Ch.19 - Chemical Thermodynamics
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 19, Problema 84a
The Kb for methylamine (CH3NH2) at 25 °C is given in Appendix D. (a) Write the chemical equation for the equilibrium that corresponds to Kb.
Guida verificata passo dopo passo1
Identify the base in the problem: Methylamine (CH_3NH_2) is a weak base.
Recall that the base dissociation constant, K_b, is related to the equilibrium of a base reacting with water.
Write the chemical equation for the reaction of methylamine with water: CH_3NH_2 + H_2O \(\rightleftharpoons\) CH_3NH_3^+ + OH^-.
Recognize that in this equilibrium, methylamine accepts a proton from water, forming the methylammonium ion (CH_3NH_3^+) and hydroxide ion (OH^-).
Ensure the equation is balanced and represents the equilibrium process for which K_b is defined.
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Equilibrium Constant (K_b)
The base dissociation constant, K_b, quantifies the strength of a base in solution. It is defined as the ratio of the concentration of the products to the concentration of the reactants at equilibrium for the reaction of a base with water. A higher K_b value indicates a stronger base, as it suggests a greater tendency to accept protons.
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Percorso guidato
01:14
Equilibrium Constant K
Chemical Equilibrium
Chemical equilibrium occurs when the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products. In the context of a base like methylamine, this means that the formation of hydroxide ions and the conjugate acid reaches a stable state where their concentrations no longer change over time.
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04:21Chemical Equilibrium Concepts
Methylamine as a Base
Methylamine (CH₃NH₂) is an organic compound that acts as a weak base in aqueous solution. When dissolved in water, it can accept a proton (H⁺) from water, leading to the formation of its conjugate acid (methylammonium ion, CH₃NH₃⁺) and hydroxide ions (OH⁻). This reaction is essential for writing the equilibrium expression for K_b.
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01:17Base Example
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