Chapter 8, Problem 51A

(a)

Interpretation Introduction

Interpretation:

The type of the given reaction needs to be predicted.

Concept Introduction:

A chemical reaction which is form between the acid and base is known as acid base reaction.

This is also known as neutralisation reaction.

Answer to Problem 51A

The given reaction is a type of acid base reaction which is shown below:

  ${\text{HNO}}_{\text{3}}\text{ + KOH }\to {\text{ H}}_{\text{2}}{\text{O + KNO}}_{\text{3}}$

Explanation of Solution

The given reaction is a type of acid base reaction which is shown below:

  ${\text{HNO}}_{\text{3}}\text{ + KOH }\to {\text{ H}}_{\text{2}}{\text{O + KNO}}_{\text{3}}$

When a strong acid (HNO₃) reacts with strong base (KOH) it will produce salt (KNO₃) and water (H₂O) in acid base reaction.

(b)

Interpretation Introduction

Interpretation:

The type of the given reaction needs to be determined.

Concept Introduction:

When two soluble salts are combined to form insoluble salt is known as precipitation reaction.

Answer to Problem 51A

The given reaction is a type of precipitation reaction which is shown below:

  $\text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(\text{aq}\right){\text{ + K}}_{\text{2}}{\text{SO}}_{\text{4}}\left(\text{aq}\right)\to {\text{CaSO}}_{\text{4}}\left(\text{s}\right){\text{ + 2KNO}}_{\text{3}}\left(\text{aq}\right)$

Explanation of Solution

The given precipitation reaction is shown below:

  $\text{Ca}{\left({\text{NO}}_{\text{3}}\right)}_{\text{2}}\left(\text{aq}\right){\text{ + K}}_{\text{2}}{\text{SO}}_{\text{4}}\left(\text{aq}\right)\to {\text{CaSO}}_{\text{4}}\left(\text{s}\right){\text{ + 2KNO}}_{\text{3}}\left(\text{aq}\right)$

When calcium nitrate reacts with potassium sulfate, then it will form precipitaes of calcium sulfate and potassium nitrate.

(c)

Interpretation Introduction

Interpretation:

The type of the given reaction needs to be predicted.

Concept Introduction:

When an atom combines with oxygen and given heat is known as combustion reaction

When two or more compounds combine to form a more complexed compound is known as direct combination reaction or synthesis.

Answer to Problem 51A

The given reaction is a type of combustion or synthesis reaction which is shown below:

  $\text{C}\left(\text{s}\right)\text{+}{\text{O}}_{\text{2}}\left(\text{g}\right)\to {\text{CO}}_{\text{2}}\left(\text{g}\right)$

Explanation of Solution

The given combustion or synthesis reaction is shown below:

  $\text{C}\left(\text{s}\right)\text{+}{\text{O}}_{\text{2}}\left(\text{g}\right)\to {\text{CO}}_{\text{2}}\left(\text{g}\right)$

When a carbon reacts with oxygen then it will form a carbon dioxide gas.

(d)

Interpretation Introduction

Interpretation:

The type of the given reaction needs to be predicted.

Concept Introduction:

When a single compound breaks down into two or more simpler compounds is known as decomposition reaction.

Answer to Problem 51A

The given reaction is a type of decomposition reaction which is shown below:

  ${\text{2H}}_{\text{2}}\text{O}\left(\text{l}\right)\to {\text{2H}}_{\text{2}}\left(\text{l}\right)\text{+}{\text{O}}_{\text{2}}\left(\text{g}\right)$

Explanation of Solution

The given decomposition reaction is shown below:

  ${\text{2H}}_{\text{2}}\text{O}\left(\text{l}\right)\to {\text{2H}}_{\text{2}}\left(\text{l}\right)\text{+}{\text{O}}_{\text{2}}\left(\text{g}\right)$

When H₂O compound breaks down into H₂ and oxygen then this type of reaction is known as decomposition reaction.