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
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Brown 14th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 40b
Brown 14th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 40bCapitolo 17, Problema 40b
Assume that 30.0 mL of a 0.10 M solution of a weak base B that accepts one proton is titrated with a 0.10 M solution of the monoprotic strong acid HA. (b) What is the predominant form of B at the equivalence point?
Guida verificata passo dopo passo1
Identify the chemical reaction: B (weak base) reacts with HA (strong acid) to form BH^+ (conjugate acid of B) and A^- (conjugate base of HA).
Determine the equivalence point: At the equivalence point, the moles of HA added are equal to the moles of B initially present.
Calculate the moles of B initially present: Use the formula \( \text{moles} = \text{concentration} \times \text{volume} \) to find the moles of B.
At the equivalence point, all B is converted to BH^+: Since B is a weak base and HA is a strong acid, the reaction goes to completion, converting all B to BH^+.
Conclude the predominant form: At the equivalence point, the predominant form of B is BH^+, the conjugate acid of the weak base B.
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Weak Base and Strong Acid Titration
In a titration involving a weak base and a strong acid, the weak base partially ionizes in solution, while the strong acid completely dissociates. At the equivalence point, the amount of acid added is stoichiometrically equivalent to the amount of base present, leading to the formation of the conjugate acid of the weak base.
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01:09
Strong Acid-Strong Base Titration
Equivalence Point
The equivalence point in a titration is the stage at which the number of moles of acid equals the number of moles of base. At this point, the solution contains only the products of the neutralization reaction, which for a weak base and strong acid titration, results in the formation of the conjugate acid of the weak base.
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01:07At the Equivalence Point
Conjugate Acid
The conjugate acid is the species formed when a base accepts a proton. In this scenario, when the weak base B accepts a proton from the strong acid HA at the equivalence point, it transforms into its conjugate acid, which is the predominant form of B in the solution at that stage.
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01:30Conjugate Acid-Base Pairs
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