Chapter 8, Problem 15A

(a)

Interpretation Introduction

Interpretation: The net ionic equations for the reaction taking place after mixing of given aqueous solutions needs to be determined. If no reaction takes place, it should be indicated.

Concept Introduction: When one or more chemicals are changed into one or more other chemicals, a chemical reaction takes place.

Answer to Problem 15A

Potassium sulphate reacts with calcium nitrate form calcium sulphate that will separate out as a solid.

Explanation of Solution

The given reaction can be represented as follows:

  $\begin{array}{l}{\text{K}}_{\text{2}}{\text{SO}}_{\text{4}}\left(aq\right)\text{+Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right)\to {\text{CaSO}}_{\text{4}}\left(s\right){\text{+KNO}}_{\text{3}}\left(aq\right)\\ {\text{SO}}_{\text{4}}{}^{\text{2-}}\left(aq\right){\text{+Ca}}^{\text{2+}}\left(aq\right)\to {\text{CaSO}}_{\text{4}}\left(s\right)\end{array}$

(b)

Interpretation Introduction

Interpretation: The net ionic equations for the reaction taking place after mixing of given aqueous solutions needs to be determined. If no reaction takes place, it should be indicated.

Concept Introduction: When one or more chemicals are changed into one or more other chemicals, a chemical reaction takes place.

Answer to Problem 15A

Iron (III) nitrate reacts with sodium carbonate to form a precipitate.

Explanation of Solution

Yes, iron (III) nitrate reacts with sodium carbonate in aqueous solution to produce iron (III) hydroxide which forms precipitate.

  $\begin{array}{l}{\text{3Na}}_{\text{2}}{\text{CO}}_{\text{3}}\text{+2Fe}{\left({\text{NO}}_{\text{3}}\right)}_{\text{3}}{\text{+3H}}_{\text{2}}\text{O}\to \text{2Fe}{\left(\text{OH}\right)}_{\text{3}}{\text{+6NaNO}}_{\text{3}}{\text{+3CO}}_{\text{2}}\\ {\text{3CO}}_{\text{3}}{}^{\text{2-}}\left(aq\right){\text{+2Fe}}^{\text{2+}}\left(aq\right)\to {\text{Fe}}_{\text{2}}{\left({\text{CO}}_{\text{3}}\right)}_{\text{3}}\left(s\right)\end{array}$

(c)

Interpretation Introduction

Interpretation: The net ionic equations for the reaction taking place after mixing of given aqueous solutions needs to be determined. If no reaction takes place, it should be indicated.

Concept Introduction: When one or more chemicals are changed into one or more other chemicals, a chemical reaction takes place.

Answer to Problem 15A

When aqueous solution of calcium iodide CaI₂ and silver nitrate AgNO₃ combine, precipitation reaction takes place.

Explanation of Solution

In the reaction, AgI will separate as a precipitate.

The reaction is represented as follows:

  $\begin{array}{l}{\text{CaI}}_{\text{2}}\left(aq\right){\text{+2AgNO}}_{\text{3}}\left(aq\right)\to \text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right)\text{+2AgI}\left(s\right)\\ {\text{2I}}^{\text{-}}\left(aq\right){\text{+2Ag}}^{\text{+}}\left(aq\right)\to \text{2AgI}\left(\text{ppt}\text{.}\right)\end{array}$

(d)

Interpretation Introduction

Interpretation: The net ionic equations for the reaction taking place after mixing of given aqueous solutions needs to be determined. If no reaction takes place, it should be indicated.

Concept Introduction: When one or more chemicals are changed into one or more other chemicals, a chemical reaction takes place.

Answer to Problem 15A

Double displacement reaction takes place.

Explanation of Solution

The reaction taking place is represented as follows:

  $\begin{array}{l}{\text{3CoSO}}_{\text{4}}\left(aq\right)\text{+2}{\left({\text{NH}}_{\text{4}}\right)}_{\text{3}}{\text{PO}}_{\text{4}}\left(aq\right)\to {\text{Co}}_{\text{3}}{\left({\text{PO}}_{\text{4}}\right)}_{\text{2}}\left(s\right)\text{+3}{\left({\text{NH}}_{\text{4}}\right)}_{\text{2}}{\text{SO}}_{\text{4}}\left(aq\right)\\ {\text{2PO}}_{\text{4}}{}^{\text{-3}}\left(aq\right){\text{+3Co}}^{\text{+2}}\left(aq\right)\to {\text{Co}}_{\text{3}}{\left({\text{PO}}_{\text{4}}\right)}_{\text{2}}\left(s\right)\end{array}$

(e)

Interpretation Introduction

Interpretation: The net ionic equations for the reaction taking place after mixing of given aqueous solutions needs to be determined. If no reaction takes place, it should be indicated.

Concept Introduction: When one or more chemicals are changed into one or more other chemicals, a chemical reaction takes place.

Answer to Problem 15A

After reaction between strontium chloride and Mercury (I) nitrate, a sold of mercury (II) chloride will separate out.

Explanation of Solution

The reaction is represented as follows:

  $\begin{array}{l}{\text{SrCl}}_{\text{2}}\left(aq\right){\text{+2HgNO}}_{\text{3}}\left(aq\right)\to \text{Sr}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right){\text{+Hg}}_{\text{2}}{\text{Cl}}_{\text{2}}\left(s\right)\\ {\text{2Cl}}^{\text{-}}\left(aq\right){\text{+2Hg}}^{\text{+}}\left(aq\right)\to {\text{Hg}}_{\text{2}}{\text{Cl}}_{\text{2}}\left(s\right)\end{array}$

(f)

Interpretation Introduction

Interpretation: The net ionic equations for the reaction taking place after mixing of given aqueous solutions needs to be determined. If no reaction takes place, it should be indicated.

Concept Introduction: When one or more chemicals are changed into one or more other chemicals, a chemical reaction takes place.

Answer to Problem 15A

Barium bromide reacts with lead (II) nitrate and lead bromide will form as a product.

Explanation of Solution

The reaction can be represented as follows:

  $\begin{array}{l}{\text{BaBr}}_{\text{2}}\left(aq\right)\text{+Pb}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right)\to {\text{PbBr}}_{\text{2}}\left(s\right)\text{+Ba}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(aq\right)\\ {\text{2Br}}^{\text{-}}\left(aq\right){\text{+Pb}}^{\text{2+}}\left(aq\right)\to {\text{PbBr}}_{\text{2}}\left(s\right)\end{array}$