Chapter 20, Problem 20.44SP

(a)

Interpretation Introduction

Interpretation: Balanced net ionic equation for the reaction of Cr metal with $HCl$ in the absence of air should be determined.

Concept introduction:

Transition element is one which can form one or more stable ions with a partially occupied d-subshell. Most of the transition elements are metals and majority of elements exists in various oxidation states also.

Metal on reaction with an acid, the products are a salt and hydrogen gas.

When a metal reacts with hydrochloric acid, the salt produced is a metal chloride.

Ionic equation is an equation in which ions are explicitly shown.

Spectator ions are the ion that appears unchanged on both sides of a reaction arrow.

Net ionic equation is the chemical equation for a reaction which lists only those species participating in the reaction.

To write the net ionic equation, steps mentioned below must be followed.

1. 1. Write the balanced molecular equation
2. 2. Write the ionic equation showing the strong electrolytes completely dissociated into cations and anions.
3. 3. Cancel the spectator ions on both sides of the ionic equation.
4. 4. Check that charges and number of atoms are balanced in the net ionic equation.

(b)

Interpretation Introduction

Interpretation: Balanced net ionic equation for the reaction of given $Zn$ metal with $HCl$ in the absence of air should be determined.

Concept introduction:

Transition element is one which can form one or more stable ions with a partially occupied d-subshell. Most of the transition elements are metals and majority of elements exists in various oxidation states also.

Metal on reaction with an acid, the products are a salt and hydrogen gas.

When a metal reacts with hydrochloric acid, the salt produced is a metal chloride.

Ionic equation is an equation in which ions are explicitly shown.

Spectator ions are the ion that appears unchanged on both sides of a reaction arrow.

Net ionic equation is the chemical equation for a reaction which lists only those species participating in the reaction.

To write the net ionic equation, steps mentioned below must be followed.

1. 1. Write the balanced molecular equation
2. 2. Write the ionic equation showing the strong electrolytes completely dissociated into cations and anions.
3. 3. Cancel the spectator ions on both sides of the ionic equation.
4. 4. Check that charges and number of atoms are balanced in the net ionic equation.

(c)

Interpretation Introduction

Interpretation: Balanced net ionic equation for the reaction of given Cu metal with $HCl$ in the absence of air should be determined.

Concept introduction:

Transition element is one which can form one or more stable ions with a partially occupied d-subshell. Most of the transition elements are metals and majority of elements exists in various oxidation states also. 

Metal on reaction with an acid, the products are a salt and hydrogen gas.

When a metal reacts with hydrochloric acid, the salt produced is a metal chloride.

Ionic equation is an equation in which ions are explicitly shown.

Spectator ions are the ion that appears unchanged on both sides of a reaction arrow.

Net ionic equation is the chemical equation for a reaction which lists only those species participating in the reaction.

To write the net ionic equation, steps mentioned below must be followed.

1. 1. Write the balanced molecular equation
2. 2. Write the ionic equation showing the strong electrolytes completely dissociated into cations and anions.
3. 3. Cancel the spectator ions on both sides of the ionic equation.
4. 4. Check that charges and number of atoms are balanced in the net ionic equation.

(d)

Interpretation Introduction

Interpretation: Balanced net ionic equation for the reaction of given $Fe$ metal with $HCl$ in the absence of air should be determined.

Concept introduction:

Transition element is one which can form one or more stable ions with a partially occupied d-subshell. Most of the transition elements are metals and majority of elements exists in various oxidation states also. 

Metal on reaction with an acid, the products are a salt and hydrogen gas.

When a metal reacts with hydrochloric acid, the salt produced is a metal chloride.

Ionic equation is an equation in which ions are explicitly shown.

Spectator ions are the ion that appears unchanged on both sides of a reaction arrow.

Net ionic equation is the chemical equation for a reaction which lists only those species participating in the reaction.

To write the net ionic equation, steps mentioned below must be followed.

1. 1. Write the balanced molecular equation
2. 2. Write the ionic equation showing the strong electrolytes completely dissociated into cations and anions.
3. 3. Cancel the spectator ions on both sides of the ionic equation.
4. 4. Check that charges and number of atoms are balanced in the net ionic equation.