Chapter 20, Problem 20.48QP

(a)

Interpretation Introduction

Interpretation: The given reaction has to be balanced.

Concept Introduction:

Balanced equation:

• It is a chemical equation in which the number of each type of atoms will be equal in the stoichiometric ratios on both the sides of the equation.
• The concept of writing a balanced chemical equation is based on the law of conversion of mass
• According to the law of conversion of mass, in a chemical reaction the mass of total amount of the product should be equal to the total mass of the reactants.
• First write the reaction from the given information.
• Then count the number of atoms of each element in reactants as well as products.
• Insert some positive integers as coefficients of reactants as well as products in order to get the equal number of all elements on both sides of the equation.

(b)

Interpretation Introduction

Interpretation: The balanced reduction reaction of the zinc metal with the given complex ion has to be written.

The ionic form of the equation also need to written.

Concept Introduction:

Reduction: It is the reaction in which the electrons are added to a reactant species. So the oxidation number of the reactant decreases as the result of addition of electrons.

Oxidation: It is the reaction in which the electrons are removed from a reactant species. So the oxidation number of the reactant increases as the result of removal of electrons.

Oxidation number: It is the number assigned to a chemical element which indicates the number of electrons lost or gained by an atom of that element.

Reducing agent: The species which undergoes oxidation to reduce another species is known as the reducing agent.

(c)

Interpretation Introduction

Interpretation: The geometry and co-ordination number of the given complex ion has to be determined.

Concept Introduction:

Molecular geometry: The term molecular geometry refers to the 3-dimensional shape of the molecule by which the molecule is occupying in space with all its surrounding atoms or ions and/or lone pair of electrons.

Co-ordination number: The number of atoms or ions or molecules that are surrounding the central metal atom or ion in a complex is known as the co-ordination number.