Chemistry: Principles and Practice
3rd Edition
ISBN: 9780534420123
Author: Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher: Cengage Learning
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Chapter 15, Problem 15.12QE
Interpretation Introduction
Interpretation:
The term analytical concentration with an example for
Concept Introduction:
A weak acid in water produces a hydrogen ion and conjugate base. When weak acid dissolves in water, some acid molecules transfer proton to water.
In solution of weak acid, the actual concentration of the acid molecules becomes less because partial acid has lost protons to form hydrogen ions and dissociation occurs.
The reaction is as follows:
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You found a bottle of aqueous solution in the laboratory cabinet. Unfortunately, the label has been eroded and you could not recognize it. To the best of your recollection, it may be one of the following solutions:
HCl
CH3COOH
CH3CH2COOH
A mixture of HF and NaF (both of substantial amount)
A mixture of H3PO4 and NaH2PO4 (both of substantial amount)
NH4Cl
NaHCO3
In order to identify the solution, you conduct the following experiments:
Using a pH meter, you determine the pH of the solution to be 3.00.
You dilute 20 mL of the solution with water to a total volume of 200 mL and
measure the pH again, this time it reads 3.50.
You take some volume of the solution, add phenolphthalein, and titrate it with
NaOH solution until the mixture turns pink. You record the volume of the required titrant as Vt and the pH meter reads 9.05.
In a separate flask, you take the same volume of the unknown solution as in step iii and titrate it with the same NaOH…
You found a bottle of aqueous solution in the laboratory cabinet. Unfortunately, the label has been eroded and you could not recognize it. To the best of your recollection, it may be one of the following solutions:
HCl
CH3COOH
CH3CH2COOH
A mixture of HF and NaF (both of substantial amount)
A mixture of H3PO4 and NaH2PO4 (both of substantial amount)
NH4Cl
NaHCO3
In order to identify the solution, you conduct the following experiments:
Using a pH meter, you determine the pH of the solution to be 3.00.
You dilute 20 mL of the solution with water to a total volume of 200 mL and
measure the pH again, this time it reads 3.50.
You take some volume of the solution, add phenolphthalein, and titrate it with
NaOH solution until the mixture turns pink. You record the volume of the required titrant as Vt and the pH meter reads 9.05.
In a separate flask, you take the same volume of the unknown solution as in step iii and titrate it with the same NaOH…
You found a bottle of aqueous solution in the laboratory cabinet. Unfortunately, the label has been eroded and you could not recognize it. To the best of your recollection, it may be one of the following solutions:
HCl
CH3COOH
CH3CH2COOH
A mixture of HF and NaF (both of substantial amount)
A mixture of H3PO4 and NaH2PO4 (both of substantial amount)
NH4Cl
NaHCO3
In order to identify the solution, you conduct the following experiments:
Using a pH meter, you determine the pH of the solution to be 3.00.
You dilute 20 mL of the solution with water to a total volume of 200 mL and
measure the pH again, this time it reads 3.50.
You take some volume of the solution, add phenolphthalein, and titrate it with
NaOH solution until the mixture turns pink. You record the volume of the required titrant as Vt and the pH meter reads 9.05.
In a separate flask, you take the same volume of the unknown solution as in step iii and titrate it with the same NaOH…
Chapter 15 Solutions
Chemistry: Principles and Practice
Ch. 15 - Prob. 15.1QECh. 15 - Can a compound be an Arrhenius base and not a...Ch. 15 - Water is not the only solvent that undergoes...Ch. 15 - Write two BrnstedLowry acid-base reactions and...Ch. 15 - Define pH and explain why pH, rather than...Ch. 15 - Prob. 15.6QECh. 15 - Prob. 15.7QECh. 15 - Prob. 15.8QECh. 15 - Prob. 15.9QECh. 15 - Prob. 15.10QE
Ch. 15 - Prob. 15.11QECh. 15 - Prob. 15.12QECh. 15 - Why have chemists not tabulated the fraction...Ch. 15 - Prob. 15.15QECh. 15 - Prob. 15.16QECh. 15 - Prob. 15.17QECh. 15 - Prob. 15.18QECh. 15 - Define oxyacid and give examples from among the...Ch. 15 - Prob. 15.20QECh. 15 - Prob. 15.21QECh. 15 - Prob. 15.22QECh. 15 - Prob. 15.23QECh. 15 - Prob. 15.24QECh. 15 - Prob. 15.25QECh. 15 - Write the formula and name for the conjugate acid...Ch. 15 - For each of the following reactions, identify the...Ch. 15 - Prob. 15.28QECh. 15 - Prob. 15.29QECh. 15 - Prob. 15.30QECh. 15 - Prob. 15.31QECh. 15 - Write an equation to describe the proton transfer...Ch. 15 - Prob. 15.33QECh. 15 - Determine the hydrogen ion or hydroxide ion...Ch. 15 - Prob. 15.35QECh. 15 - The hydroxide ion concentrations in wines actually...Ch. 15 - Prob. 15.37QECh. 15 - Prob. 15.38QECh. 15 - Prob. 15.39QECh. 15 - Prob. 15.40QECh. 15 - Prob. 15.41QECh. 15 - Prob. 15.42QECh. 15 - Prob. 15.43QECh. 15 - Prob. 15.44QECh. 15 - Prob. 15.45QECh. 15 - Prob. 15.46QECh. 15 - A saturated solution of milk of magnesia, Mg(OH)2,...Ch. 15 - Find [OH] and the pH of the following solutions....Ch. 15 - Write the chemical equation for the ionization of...Ch. 15 - Prob. 15.50QECh. 15 - Prob. 15.51QECh. 15 - Prob. 15.52QECh. 15 - Prob. 15.53QECh. 15 - Assuming that the conductivity of an acid solution...Ch. 15 - Prob. 15.55QECh. 15 - Prob. 15.56QECh. 15 - Prob. 15.57QECh. 15 - Prob. 15.58QECh. 15 - Prob. 15.59QECh. 15 - A 0.10 M solution of chloroacetic acid, ClCH2COOH,...Ch. 15 - Prob. 15.61QECh. 15 - Prob. 15.62QECh. 15 - Prob. 15.63QECh. 15 - Prob. 15.64QECh. 15 - Prob. 15.65QECh. 15 - Prob. 15.66QECh. 15 - Prob. 15.67QECh. 15 - Prob. 15.68QECh. 15 - Write the chemical equation for the ionization of...Ch. 15 - Prob. 15.70QECh. 15 - Hydrazine, N2H4, is weak base with Kb = 1.3 106....Ch. 15 - Prob. 15.72QECh. 15 - Prob. 15.73QECh. 15 - Prob. 15.74QECh. 15 - Calculate the [OH] and the pH of a 0.024 M...Ch. 15 - Prob. 15.76QECh. 15 - Prob. 15.77QECh. 15 - Prob. 15.78QECh. 15 - Prob. 15.79QECh. 15 - Prob. 15.80QECh. 15 - Find the value of Kb for the conjugate base of the...Ch. 15 - Consider sodium acrylate, NaC3H3O2. Ka for acrylic...Ch. 15 - Prob. 15.83QECh. 15 - Prob. 15.84QECh. 15 - Prob. 15.85QECh. 15 - Prob. 15.86QECh. 15 - Prob. 15.87QECh. 15 - Prob. 15.88QECh. 15 - Prob. 15.89QECh. 15 - Prob. 15.90QECh. 15 - Prob. 15.91QECh. 15 - Prob. 15.92QECh. 15 - Prob. 15.93QECh. 15 - Prob. 15.94QECh. 15 - Explain how to calculate the pH of a solution that...Ch. 15 - Prob. 15.96QECh. 15 - Prob. 15.97QECh. 15 - Prob. 15.98QECh. 15 - Hypofluorous acid, HOF, is known, but fluorous...Ch. 15 - Prob. 15.100QECh. 15 - Prob. 15.101QECh. 15 - Prob. 15.102QECh. 15 - Which of each pair of acids is stronger? Why? (a)...Ch. 15 - Prob. 15.104QECh. 15 - Prob. 15.105QECh. 15 - Prob. 15.106QECh. 15 - Prob. 15.107QECh. 15 - Prob. 15.108QECh. 15 - Prob. 15.109QECh. 15 - Prob. 15.110QECh. 15 - Prob. 15.111QECh. 15 - Prob. 15.112QECh. 15 - Prob. 15.113QECh. 15 - Prob. 15.114QECh. 15 - Prob. 15.115QECh. 15 - Prob. 15.116QECh. 15 - Prob. 15.117QECh. 15 - Prob. 15.118QECh. 15 - Prob. 15.119QECh. 15 - Prob. 15.120QECh. 15 - A solution is made by diluting 25.0 mL of...Ch. 15 - A Liquid HF undergoes an autoionization reaction:...Ch. 15 - Pure liquid ammonia ionizes in a manner similar to...Ch. 15 - Prob. 15.124QECh. 15 - Prob. 15.125QECh. 15 - Prob. 15.126QECh. 15 - Prob. 15.127QECh. 15 - Prob. 15.128QECh. 15 - An aqueous solution contains formic acid and...Ch. 15 - A solution is made by dissolving 15.0 g sodium...Ch. 15 - Calculate the pH of a solution prepared by adding...Ch. 15 - Prob. 15.132QECh. 15 - Prob. 15.133QECh. 15 - When perchloric acid ionizes, it makes the...Ch. 15 - Prob. 15.135QE
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- You found a bottle of aqueous solution in the laboratory cabinet. Unfortunately, the label has been eroded and you could not recognize it. To the best of your recollection, it may be one of the following solutions: HCl CH3COOH CH3CH2COOH A mixture of HF and NaF (both of substantial amount) A mixture of H3PO4 and NaH2PO4 (both of substantial amount) NH4Cl NaHCO3 In order to identify the solution, you conduct the following experiments: i.Using a pH meter, you determine the pH of the solution to be 3.00. ii. You dilute 20 mL of the solution with water to a total volume of 200 mL and measure the pH again, this time it reads 3.50. iii. You take some volume of the solution, add phenolphthalein, and titrate it with NaOH solution until the mixture turns pink. You record the volume of the required titrant as Vt and the pH meter reads 9.05. iv. In a separate flask, you take the same volume of the unknown solution as in step iii and titrate it with the same NaOH solution, but this time…arrow_forwardYou found a bottle of aqueous solution in the laboratory cabinet. Unfortunately, the label has been eroded and you could not recognize it. To the best of your recollection, it may be one of the following solutions: HCl CH3COOH CH3CH2COOH A mixture of HF and NaF (both of substantial amount) A mixture of H3PO4 and NaH2PO4 (both of substantial amount) NH4Cl NaHCO3 In order to identify the solution, you conduct the following experiments: 1. Using a pH meter, you determine the pH of the solution be 3.00. 2. You dilute 20 mL of the solution with water to a total volume of 200 mL and measure the pH again, this time it reads 3.50. 3. You take some volume of the solution, add phenolphthalein, and titrate it with NaOH solution until the mixture turns pink. You record the volume of the required titrant as Vt and the pH meter reads 9.05. ti =0.0 and tf=2.0. 4. In a separate flask, you take the same volume of the unknown solution as in step iii and titrate it with the same NaOH…arrow_forwardThe compound methylamine is a weak base like ammonia. A solution contains 0.199 M CH;NH3* and 0.117 M methylamine, CH3NH2. The pH of this solution isarrow_forward
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