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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Given the following solutions:

  1. (a) 0.1 M NH3
  2. (b) 0.1 M Na2CO3
  3. (c) 0.1 M NaCl
  4. (d) 0.1 M CH3CO2H
  5. (e) 0.1 M NH4Cl
  6. (f) 0.l MNH4CH3CO2
  7. (g) 0.1 M NH4CH3CO2
    1. (i) Which of the solutions are acidic?
    2. (ii) Which of the solutions are basic?
    3. (iii) Which of the solutions is most acidic?

a)

Interpretation Introduction

Interpretation:

a) 0.1M NH3b) 0.1M Na2CO3c) 0.1M NaCld) 0.1M CH3CO2H

e) 0.1M NH4Clf) 0.1M NaCH3CO2g) 0.1M NH4CH3CO2

The solutions which are acidic have to be determined from the solutions given above.

Concept introduction:

  • Salts are solid particles that are composed of cations and anions. When these are dissolved in water may or may not alter the pH of a solution due to the cation, anion or both.
  • Salts of cations from strong bases and anions of strong acids have no effect of the pH of an aqueous solution.

    The solution pH is equal to the 7.

    Example:

            NaCl(aq), KCl(aq), NaI(aq), NaNO3(aq)

  • The salt of a weak base (Cation) and strong acid (anion) dissolves in water to form acidic solutions.

    The solution has a pH less than 7.

  • The slat of strong base (cation) and weak acid (anion) dissolves in water to form basic solutions.

    The solution has a pH is greater than 7.

Explanation

0.1M CH3CO2H

CH3CO2H is a weak acid. It donates protons to water to form hydronium ions. Therefore, the solution is acidic.

CH3CO2H(aq) + H2O(l)CH3CO2-(aq) + H3O+(aq)Ka=1.8×10-5

0.01M NH4Cl

NH4Cl is a salt of a strong acid and weak base

(b)

Interpretation Introduction

Interpretation:

a) 0.1M NH3b) 0.1M Na2CO3c) 0.1M NaCld) 0.1M CH3CO2H

e) 0.1M NH4Clf) 0.1M NaCH3CO2g) 0.1M NH4CH3CO2

The solutions which are basic have to be determined from the solutions given above.

Concept introduction:

  • Salts are solid particles that are composed of cations and anions. When these are dissolved in water may or may not alter the pH of a solution due to the cation, anion or both.
  • Salts of cations from strong bases and anions of strong acids have no effect of the pH of an aqueous solution.

    The solution pH is equal to the 7.

    Example:

            NaCl(aq), KCl(aq), NaI(aq), NaNO3(aq)

  • The salt of a weak base (Cation) and strong acid (anion) dissolves in water to form acidic solutions.

    The solution has a pH less than 7.

  • The slat of strong base (cation) and weak acid (anion) dissolves in water to form basic solutions.

    The solution has a pH is greater than 7.

c)

Interpretation Introduction

Interpretation:

a) 0.1M NH3b) 0.1M Na2CO3c) 0.1M NaCld) 0.1M CH3CO2H

e) 0.1M NH4Clf) 0.1M NaCH3CO2g) 0.1M NH4CH3CO2

The solution which is the most acidic from the solutions given above has to be determined.

Concept introduction:

  • Salts are solid particles that are composed of cations and anions. When these are dissolved in water may or may not alter the pH of a solution due to the cation, anion or both.
  • Salts of cations from strong bases and anions of strong acids have no effect of the pH of an aqueous solution.

    The solution pH is equal to the 7.

    Example:

            NaCl(aq), KCl(aq), NaI(aq), NaNO3(aq)

  • The salt of a weak base (Cation) and strong acid (anion) dissolves in water to form acidic solutions.

    The solution has a pH less than 7.

  • The slat of strong base (cation) and weak acid (anion) dissolves in water to form basic solutions.

    The solution has a pH is greater than 7.

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Chapter 16 Solutions

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Sect-16.10 P-1.2ACPSect-16.10 P-1.3ACPSect-16.10 P-2.1ACPSect-16.10 P-2.2ACPSect-16.10 P-2.3ACPSect-16.10 P-2.4ACPSect-16.10 P-2.5ACPCh-16 P-1PSCh-16 P-2PSCh-16 P-3PSCh-16 P-4PSCh-16 P-5PSCh-16 P-6PSCh-16 P-7PSCh-16 P-8PSCh-16 P-9PSCh-16 P-10PSCh-16 P-11PSCh-16 P-12PSCh-16 P-13PSCh-16 P-14PSCh-16 P-15PSCh-16 P-16PSCh-16 P-17PSCh-16 P-18PSCh-16 P-19PSCh-16 P-20PSCh-16 P-21PSCh-16 P-22PSCh-16 P-23PSCh-16 P-24PSCh-16 P-25PSCh-16 P-26PSCh-16 P-27PSCh-16 P-28PSCh-16 P-29PSCh-16 P-30PSCh-16 P-31PSCh-16 P-32PSCh-16 P-33PSCh-16 P-34PSCh-16 P-35PSCh-16 P-36PSCh-16 P-37PSCh-16 P-38PSCh-16 P-39PSCh-16 P-40PSCh-16 P-41PSCh-16 P-42PSCh-16 P-43PSCh-16 P-44PSCh-16 P-45PSCh-16 P-46PSCh-16 P-47PSCh-16 P-48PSCh-16 P-49PSCh-16 P-50PSCh-16 P-51PSCh-16 P-52PSCh-16 P-53PSCh-16 P-54PSCh-16 P-55PSCh-16 P-56PSCh-16 P-57PSCh-16 P-58PSCh-16 P-59PSCh-16 P-60PSCh-16 P-61PSCh-16 P-62PSCh-16 P-63PSCh-16 P-64PSCh-16 P-65PSCh-16 P-66PSCh-16 P-67PSCh-16 P-68PSCh-16 P-69PSCh-16 P-70PSCh-16 P-71PSCh-16 P-72PSCh-16 P-73PSCh-16 P-74PSCh-16 P-75PSCh-16 P-76PSCh-16 P-77PSCh-16 P-78PSCh-16 P-79PSCh-16 P-80PSCh-16 P-81PSCh-16 P-82PSCh-16 P-83PSCh-16 P-84PSCh-16 P-85GQCh-16 P-86GQCh-16 P-87GQCh-16 P-88GQCh-16 P-89GQCh-16 P-90GQCh-16 P-91GQCh-16 P-92GQCh-16 P-93GQCh-16 P-94GQCh-16 P-95GQCh-16 P-96GQCh-16 P-97GQCh-16 P-98GQCh-16 P-99GQCh-16 P-100GQCh-16 P-101GQCh-16 P-102GQCh-16 P-103GQCh-16 P-104GQCh-16 P-105GQCh-16 P-106GQCh-16 P-107GQCh-16 P-108GQCh-16 P-109GQCh-16 P-110GQCh-16 P-111ILCh-16 P-112ILCh-16 P-113ILCh-16 P-114ILCh-16 P-115ILCh-16 P-116ILCh-16 P-117ILCh-16 P-118ILCh-16 P-119SCQCh-16 P-120SCQCh-16 P-121SCQCh-16 P-122SCQCh-16 P-123SCQCh-16 P-124SCQCh-16 P-125SCQCh-16 P-126SCQCh-16 P-127SCQCh-16 P-128SCQCh-16 P-129SCQ

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