Chapter 7, Problem 7.101UTC

(a)

Interpretation Introduction

Interpretation: To balance the following reaction by adding coefficients and identify the type of 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.

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.

Balanced equation will be:

This is a type of combination reaction.

In the given reaction, the reactant contains two blue atoms and two pink atoms.

So,

Product should contain 2 blue atoms and 2 pink atoms.

But in product side, we have a molecule having only one blue atom and 1 pink atom. Therefore, we need to multiply the product with 2 to make it balance.

In this chemical reaction,

2 reactants are combined to form a single product. Hence, it is a type of combination reaction.

Answer to Problem 7.101UTC

Balanced equation will be:

This is a type of combination reaction.

Explanation of Solution

In the given reaction, the reactant contains two blue atoms and two pink atoms.

So,

Product should contain 2 blue atoms and 2 pink atoms.

But in product side, we have a molecule having only one blue atom and 1 pink atom. Therefore, we need to multiply the product with 2 to make it balance.

In this chemical reaction,

2 reactants are combined to form a single product. Hence, it is a type of combination reaction.

(b)

Interpretation Introduction

Interpretation: To balance the following reaction by adding coefficients and identify the type of 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.

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.

Answer to Problem 7.101UTC

Balanced equation will be:

This is a type of decomposition reaction.

Explanation of Solution

In the given reaction, the reactant side contains 2 blue atoms and 1 pink atom.

So, product side should contain 2 blue atoms and 1 pink atom.

But in product side, we have two different products as:

First product has 2 blue atoms and second molecule has 2 pink atoms.

If we multiply the reactant and first product by 2, then reaction will be balance as now both reactants and product have 4 blue atoms and 2 pink atoms respectively.

Here one reactant breaks down into two products. Thus, it is a type of decomposition reaction.