Chapter 3, Problem 117QRT

(a)

Interpretation Introduction

Interpretation:

When the given ${\text{CaCO}}_{\text{3}}\text{(s) and HCI(aq)}$ pairs of reactants mixed together, how the content look like does before and after reaction has to be described.

Concept introduction:

Gas forming reaction: The reaction of acid and metal carbonates which produce carbonic acid. The carbonic acid decomposes which gives water and carbon dioxide.

(b)

Interpretation Introduction

Interpretation:

The nanoparticle diagram for the given reaction has to be drawn.

Concept introduction:

Refer to part (a)

(c)

Interpretation Introduction

Interpretation:

The chemical equation has to be written.

Concept introduction:

Balanced Chemical equation:

A balanced chemical equation is an equation which contains same elements in same number on both the sides (reactant and product side) of the chemical equation thereby obeying the law of conservation of mass.

Balancing the equation:

• There is a Law for conversion of mass in a chemical reaction i.e., the mass of total amount of the product should be equal to the total mass of the reactants.
• First write the skeletal reaction from the given information.
• Then count the number of atoms of each element in reactants as well as products.
• Place suitable coefficients in front of reactants as well as products until the number of atoms on each side (reactants and products) becomes equal.