Domanda del libro di testo
Consider the molecular models shown here, where X represents a halogen atom. (a) If X is the same atom in both molecules, which molecule will be more acidic?
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Ch.16 - Acid-Base Equilibria
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 16, Problema 9c
Phenylephrine, an organic substance with molecular formula C9H13NO2, is used as a nasal decongenstant in over-thecounter medications. The molecular structure of phenylephrine is shown below using the usual shortcut organic structure. (c) Would you expect a solution of phenylephrine hydrochloride to be acidic, neutral, or basic?
Guida verificata passo dopo passo1
Identify the functional groups present in the phenylephrine molecule. The structure shows an aromatic ring, a hydroxyl group (-OH), and an amine group (-NH2).
Understand that phenylephrine hydrochloride is the hydrochloride salt form of phenylephrine, which means it has been reacted with hydrochloric acid (HCl).
Recognize that the amine group (-NH2) in phenylephrine can accept a proton (H+) from HCl, forming an ammonium ion (-NH3+).
Recall that ammonium ions (NH3+) are acidic in nature because they can donate a proton (H+) to the solution, making the solution acidic.
Conclude that a solution of phenylephrine hydrochloride would be expected to be acidic due to the presence of the ammonium ion.
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Acid-Base Chemistry
Acid-base chemistry involves the study of substances that can donate protons (acids) or accept protons (bases). The pH scale measures the acidity or basicity of a solution, with values below 7 indicating acidity, 7 being neutral, and above 7 indicating basicity. Understanding the nature of the solute and its ability to donate or accept protons is crucial for predicting the pH of a solution.
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Percorso guidato
02:00
Arrhenius Acids and Bases
Ionization of Phenylephrine
Phenylephrine contains a hydroxyl group (-OH) and an amine group (-NH), which can influence its behavior in solution. When phenylephrine is dissolved in water, it can undergo ionization, where the amine group can accept a proton, forming a positively charged ion. This ionization is key to determining whether the resulting solution is acidic, neutral, or basic.
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02:22Auto-Ionization and Kw
Phenylephrine Hydrochloride
Phenylephrine hydrochloride is the hydrochloride salt form of phenylephrine, which is often more soluble in water than its base form. The presence of the hydrochloride ion (Cl-) can affect the overall pH of the solution. Typically, salts formed from weak bases and strong acids tend to create acidic solutions, which is an important consideration when evaluating the acidity of phenylephrine hydrochloride.
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00:59Oxide Reactions Example
Pratica correlata
Domanda del libro di testo
The following diagrams represent aqueous solutions of three acids, HX, HY, and HZ. The water molecules have been omitted for clarity, and the hydrated proton is represented as H+ rather than H3O+.(c) Which solution would have the highest pH?
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1
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Domanda del libro di testo
Each of the three molecules shown here contains an OH group, but one molecule acts as a base, one as an acid, and the third is neither acid nor base. (c) Which one is neither acidic nor basic?
665
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Domanda del libro di testo
Phenylephrine, an organic substance with molecular formula C9H13NO2, is used as a nasal decongenstant in over-thecounter medications. The molecular structure of phenylephrine is shown below using the usual shortcut organic structure. (a) Would you expect a solution of phenylephrine to be acidic, neutral, or basic?
943
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Domanda del libro di testo
Consider the molecular models shown here, where X represents a halogen atom. (b) Does the acidity of each molecule increase or decrease as the electronegativity of the atom X increases?
330
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