Domanda del libro di testo
Two 25.0-mL samples, one 0.100 M HCl and the other 0.100 M HF, are titrated with 0.200 M KOH. c. Which titration curve has the lower initial pH?
1062
views
Ch.18 - Aqueous Ionic Equilibrium
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving117
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds128
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions84
- Ch.6 - Gases112
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements86
- Ch.10 - Chemical Bonding I: The Lewis Model91
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials48
- Ch.14 - Solutions93
- Ch.15 - Chemical Kinetics114
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases137
- Ch.18 - Aqueous Ionic Equilibrium154
- Ch.19 - Free Energy & Thermodynamics91
- Ch.20 - Electrochemistry105
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry141
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371Non è quello che usi tu?Cambia libro di testo
Capitolo 18, Problema 62b
Two 25.0-mL samples, one 0.100 M HCl and the other 0.100 M HF, are titrated with 0.200 M KOH. b. Is the pH at the equivalence point for each titration acidic, basic, or neutral?
Guida verificata passo dopo passo1
insert step 1> Determine the nature of the reaction for each titration. HCl is a strong acid, and HF is a weak acid. Both are being titrated with KOH, a strong base.
insert step 2> For the HCl titration, since HCl is a strong acid, it will completely dissociate in water. The reaction with KOH will produce water and KCl, a neutral salt.
insert step 3> At the equivalence point of the HCl titration, the solution will be neutral because the strong acid and strong base completely neutralize each other, resulting in a pH of 7.
insert step 4> For the HF titration, HF is a weak acid and does not completely dissociate in water. The reaction with KOH will produce water and KF, a salt that can hydrolyze to form a basic solution.
insert step 5> At the equivalence point of the HF titration, the solution will be basic because the conjugate base (F-) from the weak acid (HF) will react with water to form OH- ions, increasing the pH above 7.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
1mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Strong vs. Weak Acids
Strong acids, like HCl, completely dissociate in solution, while weak acids, such as HF, only partially dissociate. This difference affects the pH at the equivalence point during titration. At the equivalence point, the strong acid will yield a neutral solution, while the weak acid will result in a solution that is more acidic due to the presence of undissociated acid molecules.
Video consigliato:
Percorso guidato
02:19
Weak Acid-Strong Base Titration Curve
Titration and Equivalence Point
Titration is a technique used to determine the concentration of an acid or base by neutralizing it with a base or acid of known concentration. The equivalence point is reached when the amount of titrant added is stoichiometrically equivalent to the amount of substance being titrated. This point is crucial for determining the resulting pH of the solution, which varies depending on the strength of the acid or base involved.
Video consigliato:
Percorso guidato
03:06Equivalence Point in Titration
pH and Its Interpretation
pH is a measure of the hydrogen ion concentration in a solution, indicating its acidity or basicity. A pH less than 7 is considered acidic, a pH of 7 is neutral, and a pH greater than 7 is basic. Understanding how the pH changes at the equivalence point of different acid-base titrations is essential for predicting the nature of the resulting solution.
Video consigliato:
Percorso guidato
02:33The pH Scale
Pratica correlata
Domanda del libro di testo
The graphs labeled (a) and (b) show the titration curves for two equal-volume samples of monoprotic acids, one weak and one strong. Both titrations were carried out with the same concentration of strong base.
(i) What is the approximate pH at the equivalence point of each curve?
864
views
Domanda del libro di testo
Two 20.0-mL samples, one 0.200 M KOH and the other 0.200 M CH3NH2, are titrated with 0.100 M HI. a. What is the volume of added acid at the equivalence point for each titration?
1443
views
Domanda del libro di testo
The graphs labeled (a) and (b) show the titration curves for two equal-volume samples of monoprotic acids, one weak and one strong. Both titrations were carried out with the same concentration of strong base.
(ii) Which graph corresponds to the titration of the strong acid and which one to the titration of the weak acid?
1115
views
Domanda del libro di testo
Two 25.0-mL samples, one 0.100 M HCl and the other 0.100 M HF, are titrated with 0.200 M KOH.
d. Sketch each titration curve.
88
views