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
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
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Brown 15th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 40a
Brown 15th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 40aCapitolo 17, Problema 40a
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?
Guida verificata passo dopo passo1
Identify the initial conditions: You have 30.0 mL of a 0.10 M solution of a weak base B.
Calculate the initial moles of the weak base B using the formula: \( \text{moles of B} = M \times V \), where \( M \) is the molarity and \( V \) is the volume in liters.
Recognize that at the equivalence point, the moles of the weak base B will equal the moles of the strong acid HA added.
Since the molarity of HA is the same as that of B (0.10 M), the volume of HA added at the equivalence point will be the same as the initial volume of B.
Calculate the moles of HA added at the equivalence point using the same formula: \( \text{moles of HA} = M \times V \), where \( M \) is the molarity of HA and \( V \) is the volume of HA added.
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Titration
Titration is a quantitative analytical technique used to determine the concentration of a solute in a solution. It involves the gradual addition of a titrant (in this case, the strong acid HA) to a solution containing the analyte (the weak base B) until the reaction reaches its equivalence point, where stoichiometrically equivalent amounts of acid and base have reacted.
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Percorso guidato
03:04
Acid-Base Titration
Equivalence Point
The equivalence point in a titration is the stage at which the amount of titrant added is exactly enough to completely neutralize the analyte in the solution. For a weak base titrated with a strong acid, this point is characterized by a complete reaction between the base and the acid, resulting in the formation of water and a salt, and is crucial for calculating the moles of titrant used.
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Percorso guidato
01:07At the Equivalence Point
Molarity and Moles
Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution. To find the number of moles of a substance, you can multiply the molarity of the solution by its volume in liters. In this question, the molarity of the strong acid HA and the volume at the equivalence point will help determine how many moles of HA have reacted with the weak base B.
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Percorso guidato
01:13Molarity
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