Chapter 7, Problem 7.108UTC

(a)

Interpretation Introduction

Interpretation: To write the chemical formula for each reactants and products given in a chemical reaction:

Concept Introduction:

Mass can neither be created nor be destroyed.

A chemical reaction should be well balance i.e. the number of atoms of each element in reactant side must be equal to number of atoms in product side.

According to the question:

Purple sphere represents Iodine-atom (I).

Blue sphere represents Nitrogen-atom (N).

There are two reactants and one product as follows:

Reactants = Iodine molecule (I₂) and nitrogen molecule (N₂).

Products = Nitrogen triiodide (HI).

According to the question:

Purple sphere = Iodine -atom

Blue sphere = Nitrogen-atom

Therefore,

The first reactant is:

= I₂known as iodine molecule.

The second reactant is:

= N₂known as nitrogen molecule or dinitrogen.

The product is:

= NI₃known as nitrogen triiodide.

(b)

Interpretation Introduction

Interpretation: To balance the given chemical reaction:

Concept Introduction:

Mass can neither be created nor be destroyed.

A chemical reaction should be well balance i.e. the number of atoms of each element in reactant side must be equal to number of atoms in product side.

Purple sphere = Iodine atom

Blue sphere = Nitrogen atom

(c)

Interpretation Introduction

Interpretation: To indicate the type of given chemical reaction:

  ${\text{6I}}_{\text{2}}\text{(g)}\text{+}{\text{2N}}_{\text{2}}\text{(g)}\to {\text{4NI}}_{\text{3}}\text{(s)}$

Concept Introduction:

Types of chemical reaction:

• Combination reaction: Here two or more reactants combines to form a single product
• Decomposition product: In this type of reaction, one reactant is breakdown into two or more products
• Displacement reaction: This is a type of reaction where more reactive element displaces the less reactive element.
• Double-displacement reaction: In this type of reaction, two compounds react in such a way that cations and anions of two reactants interchange their place.