Domanda del libro di testo
State whether each of the following statements is true or false. Justify your answer in each case. (b) HCl is a weak acid.
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Ch.4 - Reactions in Aqueous Solution
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 4, Problema 34a
State whether each of the following statements is true or false. Justify your answer in each case. (a) NH3 contains no OH- ions, and yet its aqueous solutions are basic
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Identify the chemical formula and structure of ammonia (NH3). Ammonia is a compound consisting of nitrogen and hydrogen atoms.
Understand the behavior of ammonia in water. When NH3 is dissolved in water, it reacts with water molecules to form ammonium ions (NH4+) and hydroxide ions (OH-).
Write the chemical equation for the reaction of ammonia with water: NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH-(aq).
Analyze the presence of OH- ions. From the reaction, it is evident that OH- ions are produced, which are responsible for the basic nature of the solution.
Conclude that the statement 'NH3 contains no OH- ions, and yet its aqueous solutions are basic' is false because the basic nature of NH3 solutions is due to the presence of OH- ions produced in the reaction with water.
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Ammonia and Basicity
Ammonia (NH3) is a weak base that can accept protons (H+) from water, leading to the formation of ammonium ions (NH4+) and hydroxide ions (OH-) in solution. This reaction increases the concentration of OH- ions, which is responsible for the basic nature of the solution, even though NH3 itself does not contain OH- ions.
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Percorso guidato
02:31
Moles of Ammonia Example
Equilibrium in Aqueous Solutions
In aqueous solutions, a dynamic equilibrium exists between the reactants and products of a chemical reaction. For ammonia, the equilibrium between NH3, NH4+, and OH- illustrates how the presence of NH3 can lead to the generation of OH- ions, contributing to the basicity of the solution despite NH3 lacking OH- in its molecular structure.
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01:11Types of Aqueous Solutions
pH and Basic Solutions
The pH scale measures the acidity or basicity of a solution, with values below 7 indicating acidity and values above 7 indicating basicity. A basic solution has a higher concentration of OH- ions, which raises the pH. Therefore, the presence of OH- ions, even if generated from NH3, is what classifies the solution as basic.
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02:33The pH Scale
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