Chapter 7, Problem 95AP

Interpretation Introduction

(a)

Interpretation:

The balanced molecular chemical equation should be determined for the type of reaction.

Concept Introduction:

A combination reaction is a chemical change which is obtained by combination of two reactants and to form only one product.

Interpretation Introduction

(b)

Interpretation:

The balanced molecular chemical equation should be determined for the type of reaction.

Concept Introduction:

A precipitation reaction is a chemical change in which an un-dissolved solid precipitate would be formed as a product.

Interpretation Introduction

(c)

Interpretation:

The balanced molecular chemical equation should be determined for the type of reaction.

Concept Introduction:

A double displacement reaction includes the mutual exchange of metal cations and results the new products.

Interpretation Introduction

(d)

Interpretation:

The balanced molecular chemical equation should be determined for the type of reaction.

Concept Introduction:

Acid is a substance which produces hydronium ion in water whereas base is a substance which produces hydroxyl ion. When an acid and base is mixed together it creates a neutralized environment and forms salt and water as the products.

Interpretation Introduction

(e)

Interpretation:

The balanced molecular chemical equation should be determined for the type of reaction.

Concept introduction:

Oxidation is a reaction in which follows the following conditions.

• Oxygen is added to reactants.
• Hydrogen is removed from the reactant.
• Electrons are removed from the reactant.

In the similar way the reduction is the opposite of oxidation and it is as follows.

• Oxygen is removed from reactants.
• Hydrogen is added to the reactant.
• Electrons are added to the reactant.

If both reactions occur in the same reaction such reactions are known as redox reactions.

Interpretation Introduction

(f)

Interpretation:

The balanced molecular chemical equation should be determined for the type of reaction.

Concept Introduction:

If a compound burns in presence of excess of oxygen to form heat/energy with a new compound such type of reactions are called combustion reaction.

${\text{CH}}_4\left(\text{g}\right)+2{\text{O}}_2\left(\text{g}\right)\stackrel{}{\to }{\text{CO}}_{\text{2}}\left(\text{g}\right)+2{\text{H}}_{\text{2}}\text{O}\left(\text{g}\right)+\text{h}\text{e}\text{a}\text{t}$.

In the above reaction, methane gas burns in presence of Oxygen and produces Carbon dioxide gas, water vapour and heat. As energy is evolved in the above reaction, this reaction is considered as exothermic reactions. Here, the burning of fossil fuels to generate energy also other type of combustion reactions.