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Chapter 16, Problem 16.99QP

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CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933

Solutions

Chapter
Section
FindFindarrow_forward

CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933

(a)

Interpretation Introduction

Interpretation:

Whether the given solutions are acidic, basic or neutral has to be predicted

Concept Information:

Salt hydrolysis is a reaction in which the ion of salt reacts with water and produce either hydronium ion or hydroxide ion.

  • In other words, when an ionic compound bearing a weak base as its anion is dissolved in water undergoes hydrolysis.  The weak base anion accepts a proton from water and produce its conjugate base and hydroxide ion.
  • For Example: The dissociation of salt NaF gives Na+ and F- ions.  The ions of NaF reacts with water and produce hydroxide ions, which affects the pH of the solution.

F(aq)+H2O(l)HF(aq)+OH-(aq)

  • In general, cations that are strong conjugate acids, anions that are strong conjugate bases, and small, highly charged metal ions will undergo hydrolysis.
  • The extent of hydrolysis is depends on the charge and size of the metal cation.  The metal cation with small size and high charge shows greatest extent of hydrolysis because compact, highly charged ion is more effective in polarizing the  OH   bond and facilitates ionization.
  • If the anion of salt forms weak acid, then hydrolysis takes place

pH scale:

The acidity or basicity of an aqueous solution was called using a numerical scale called pH scale.

Based on pH of the solution, salt solutions can be classified as

  • Acidic-(pH will be less than seven)
  • Basic -(pH will be more than seven)
  • Neutral -(pH will be equal to seven)

When both the cation and the anion react with water, the pH of the solution will depend on the relative magnitudes of Ka for the cation and Kb for the anion.

To Predict: Whether the given NaBr solution is acidic, basic or neutral

(b)

Interpretation Introduction

Interpretation:

Whether the given solutions are acidic, basic or neutral has to be predicted

Concept Information:

Salt hydrolysis is a reaction in which the ion of salt reacts with water and produce either hydronium ion or hydroxide ion.

  • In other words, when an ionic compound bearing a weak base as its anion is dissolved in water undergoes hydrolysis.  The weak base anion accepts a proton from water and produce its conjugate base and hydroxide ion.
  • For Example: The dissociation of salt NaF gives Na+ and F- ions.  The ions of NaF reacts with water and produce hydroxide ions, which affects the pH of the solution.

F(aq)+H2O(l)HF(aq)+OH-(aq)

  • In general, cations that are strong conjugate acids, anions that are strong conjugate bases, and small, highly charged metal ions will undergo hydrolysis.
  • The extent of hydrolysis is depends on the charge and size of the metal cation.  The metal cation with small size and high charge shows greatest extent of hydrolysis because compact, highly charged ion is more effective in polarizing the  OH   bond and facilitates ionization.
  • If the anion of salt forms weak acid, then hydrolysis takes place

pH scale:

The acidity or basicity of an aqueous solution was called using a numerical scale called pH scale.

Based on pH of the solution, salt solutions can be classified as

  • Acidic-(pH will be less than seven)
  • Basic -(pH will be more than seven)
  • Neutral -(pH will be equal to seven)

When both the cation and the anion react with water, the pH of the solution will depend on the relative magnitudes of Ka for the cation and Kb for the anion.

To Predict: Whether the given K2SO3 solution is acidic, basic or neutral

(c)

Interpretation Introduction

Interpretation:

Whether the given solutions are acidic, basic or neutral has to be predicted

Concept Information:

Salt hydrolysis is a reaction in which the ion of salt reacts with water and produce either hydronium ion or hydroxide ion.

  • In other words, when an ionic compound bearing a weak base as its anion is dissolved in water undergoes hydrolysis.  The weak base anion accepts a proton from water and produce its conjugate base and hydroxide ion.
  • For Example: The dissociation of salt NaF gives Na+ and F- ions.  The ions of NaF reacts with water and produce hydroxide ions, which affects the pH of the solution.

F(aq)+H2O(l)HF(aq)+OH-(aq)

  • In general, cations that are strong conjugate acids, anions that are strong conjugate bases, and small, highly charged metal ions will undergo hydrolysis.
  • The extent of hydrolysis is depends on the charge and size of the metal cation.  The metal cation with small size and high charge shows greatest extent of hydrolysis because compact, highly charged ion is more effective in polarizing the  OH   bond and facilitates ionization.
  • If the anion of salt forms weak acid, then hydrolysis takes place

pH scale:

The acidity or basicity of an aqueous solution was called using a numerical scale called pH scale.

Based on pH of the solution, salt solutions can be classified as

  • Acidic-(pH will be less than seven)
  • Basic -(pH will be more than seven)
  • Neutral -(pH will be equal to seven)

When both the cation and the anion react with water, the pH of the solution will depend on the relative magnitudes of Ka for the cation and Kb for the anion.

To Predict: Whether the given NH4NO2 solution is acidic, basic or neutral

(d)

Interpretation Introduction

Interpretation:

Whether the given solutions are acidic, basic or neutral has to be predicted

Concept Information:

Salt hydrolysis is a reaction in which the ion of salt reacts with water and produce either hydronium ion or hydroxide ion.

  • In other words, when an ionic compound bearing a weak base as its anion is dissolved in water undergoes hydrolysis.  The weak base anion accepts a proton from water and produce its conjugate base and hydroxide ion.
  • For Example: The dissociation of salt NaF gives Na+ and F- ions.  The ions of NaF reacts with water and produce hydroxide ions, which affects the pH of the solution.

F(aq)+H2O(l)HF(aq)+OH-(aq)

  • In general, cations that are strong conjugate acids, anions that are strong conjugate bases, and small, highly charged metal ions will undergo hydrolysis.
  • The extent of hydrolysis is depends on the charge and size of the metal cation.  The metal cation with small size and high charge shows greatest extent of hydrolysis because compact, highly charged ion is more effective in polarizing the  OH   bond and facilitates ionization.
  • If the anion of salt forms weak acid, then hydrolysis takes place

pH scale:

The acidity or basicity of an aqueous solution was called using a numerical scale called pH scale.

Based on pH of the solution, salt solutions can be classified as

  • Acidic-(pH will be less than seven)
  • Basic -(pH will be more than seven)
  • Neutral -(pH will be equal to seven)

When both the cation and the anion react with water, the pH of the solution will depend on the relative magnitudes of Ka for the cation and Kb for the anion.

To Predict: Whether the given Cr(NO3)3 solution is acidic, basic or neutral

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