Domanda del libro di testo
Predict whether the equivalence point of each of the following titrations is below, above, or at pH 7: (c) pyridine titrated with nitric 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 38b
Brown 14th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 38bCapitolo 17, Problema 38b
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.
Guida verificata passo dopo passo1
Identify the nature of the titrant and the analyte. In this case, calcium hydroxide (Ca(OH)2) is a strong base and perchloric acid (HClO4) is a strong acid.
Understand that the equivalence point in a titration is where the amount of titrant added is stoichiometrically equivalent to the amount of analyte present. For strong acid-strong base titrations, the reaction is a neutralization reaction.
Write the balanced chemical equation for the reaction: \( Ca(OH)_2 + 2HClO_4 \rightarrow Ca(ClO_4)_2 + 2H_2O \).
Recognize that at the equivalence point of a strong acid-strong base titration, the only species present in significant amounts are the salt and water. The salt formed does not undergo any hydrolysis as it is a neutral salt.
Conclude that since the salt formed does not affect the pH and water is neutral, the pH at the equivalence point will be at pH 7.
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Strong Acid-Strong Base Titration
In a strong acid-strong base titration, the equivalence point occurs when the amount of acid equals the amount of base, resulting in a neutral solution. For titrations involving strong acids like perchloric acid and strong bases like calcium hydroxide, the pH at the equivalence point is typically around 7, indicating neutrality.
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Percorso guidato
01:09
Strong Acid-Strong Base Titration
pH of Calcium Hydroxide
Calcium hydroxide (Ca(OH)₂) is a strong base that dissociates completely in water to produce hydroxide ions (OH⁻). This results in a high pH solution, typically above 12. When titrated with a strong acid, the initial pH is significantly higher than 7, influencing the pH at the equivalence point.
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06:12Hydroxide Ion Concentration Example
Effect of Strong Acid on pH
When a strong acid like perchloric acid is added to a strong base, the resulting solution's pH at the equivalence point depends on the relative strengths of the acid and base. In this case, since both are strong, the pH at the equivalence point will be neutral (around 7), but the initial high pH of the base means the transition will be significant, leading to a final pH that may be slightly below 7 due to the excess of H⁺ ions.
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02:39pH of Strong Acids and Bases
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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. (a) How many moles of HA have been added at the equivalence point?
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Domanda del libro di testo
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?
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