Domanda del libro di testo
Predict whether the equivalence point of each of the following titrations is below, above, or at pH 7: (b) calcium hydroxide titrated with perchloric acid.
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Ch.17 - Additional Aspects of Aqueous 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
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Brown 14th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 37b
Brown 14th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 37bCapitolo 17, Problema 37b
Predict whether the equivalence point of each of the following titrations is below, above, or at pH 7: (b) NH3 titrated with HCl.
Guida verificata passo dopo passo1
Identify the nature of the reactants: NH3 is a weak base and HCl is a strong acid.
Understand that the equivalence point in a titration occurs when the moles of acid equal the moles of base.
Recognize that at the equivalence point, the solution will primarily contain the conjugate acid of the weak base, NH4+.
Recall that NH4+ is a weak acid, which will slightly dissociate in water to produce H+ ions, lowering the pH.
Conclude that the equivalence point for the titration of NH3 with HCl will be below pH 7 due to the presence of NH4+.
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Acid-Base Titration
An acid-base titration is a quantitative analytical method used to determine the concentration of an acid or base in a solution. During the titration, a solution of known concentration (the titrant) is added to a solution of unknown concentration until the reaction reaches its equivalence point, where the amount of acid equals the amount of base. The pH at this point can vary depending on the strengths of the acid and base involved.
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Percorso guidato
03:04
Acid-Base Titration
Weak Base and Strong Acid
In the titration of a weak base, such as ammonia (NH3), with a strong acid like hydrochloric acid (HCl), the resulting solution at the equivalence point contains the conjugate acid (NH4+) of the weak base. This conjugate acid can donate protons to water, leading to a decrease in pH. Therefore, the pH at the equivalence point will be below 7, indicating an acidic solution.
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01:09Strong Acid-Strong Base Titration
pH Scale and Equivalence Point
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. The equivalence point in a titration is critical for determining the pH of the resulting solution. For titrations involving a weak base and a strong acid, the pH at the equivalence point will typically be less than 7 due to the formation of a weakly basic conjugate acid.
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02:33The pH Scale
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Determine whether each of the following statements concerning the titrations in Problem 17.35 is true or false. (b) The titration curves will both be essentially the same after passing the equivalence point.
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