Domanda del libro di testo
Predict whether the equivalence point of each of the following titrations is below, above, or at pH 7: (a) NaHCO3 titrated with NaOH (c) KOH titrated with HBr.
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
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
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Brown 15th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 35a
Brown 15th EditionCh.17 - Additional Aspects of Aqueous EquilibriaProblema 35aCapitolo 17, Problema 35a
The samples of nitric and acetic acids shown here are both titrated with a 0.100 M solution of NaOH(aq).
Determine whether each of the following statements concerning these titrations is true or false. (a) A larger volume of NaOH1aq2 is needed to reach the equivalence point in the titration of HNO3.
Guida verificata passo dopo passo1
Step 1: Identify the acids in the beakers. The first beaker contains 30.0 mL of 0.50 M chloric acid (HClO3), and the second beaker contains 30.0 mL of 0.50 M formic acid (HCOOH).
Step 2: Write the balanced chemical equations for the titration reactions. For chloric acid: HClO3 + NaOH -> NaClO3 + H2O. For formic acid: HCOOH + NaOH -> HCOONa + H2O.
Step 3: Calculate the moles of each acid present. Use the formula: moles = molarity * volume (in liters).
Step 4: Determine the moles of NaOH required to reach the equivalence point for each titration. Since both reactions are 1:1 stoichiometry, the moles of NaOH needed will be equal to the moles of each acid.
Step 5: Compare the volumes of 0.100 M NaOH needed to reach the equivalence point for each acid. Use the formula: volume (L) = moles / molarity.
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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, a solution of known concentration, to a sample until the reaction reaches its equivalence point, where the amount of titrant equals the amount of substance in the sample. The endpoint is often indicated by a color change due to an indicator.
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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 stoichiometrically equivalent to the amount of substance present in the sample. At this point, the reaction between the acid and base is complete, and the pH of the solution changes significantly. Understanding the equivalence point is crucial for determining the volume of titrant needed for complete neutralization.
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Percorso guidato
01:07At the Equivalence Point
Acid Strength and Concentration
The strength of an acid refers to its ability to dissociate in solution, with strong acids like nitric acid (HNO3) completely ionizing, while weak acids like formic acid (HCOOH) only partially ionize. The concentration of an acid, measured in molarity (M), indicates the amount of acid present in a given volume of solution. The combination of strength and concentration affects the volume of titrant required to reach the equivalence point in a titration.
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03:51Binary Acid Strengths
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Determine whether each of the following statements concerning the titrations in Problem 17.35 is true or false. b. Both titration curves will be essentially the same after passing the equivalence point.