Chapter 18.4, Problem 18.5P

(a)

Interpretation Introduction

Interpretation:

Balanced net ionic equation for the reaction of Strontium hydride with water has to be written.

Concept Introduction:

Alkali metal hydrides contains cations and anions (${\text{H}}^{\text{-}}$).  The ${\text{H}}^{\text{-}}$ is good proton acceptor, therefore ionic hydrides react with ${\text{H}}_{\text{2}}\text{O}$ to produce ${\text{H}}_{\text{2}}$ gas and ${\text{OH}}^{\text{-}}$.

Balancing the reaction:

• 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.
• The concept of writing a balanced chemical reaction is depends on conversion of reactants into products.
• First write the reaction from the given information.
• Then count the number of atoms of each element in reactants as well as products.
• Finally obtained values could be placed as coefficients of reactants as well as products.

(b)

Interpretation Introduction

Interpretation:

Balanced net ionic equation for the reaction of Potassium hydride with water has to be written.

Concept Introduction:

Alkali metal hydrides contains cations and anions (${\text{H}}^{\text{-}}$).  The ${\text{H}}^{\text{-}}$ is good proton acceptor, therefore ionic hydrides react with ${\text{H}}_{\text{2}}\text{O}$ to produce ${\text{H}}_{\text{2}}$ gas and ${\text{OH}}^{\text{-}}$

Balancing the reaction:

• 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.
• The concept of writing a balanced chemical reaction is depends on conversion of reactants into products.
• First write the reaction from the given information.
• Then count the number of atoms of each element in reactants as well as products.
• Finally obtained values could be placed as coefficients of reactants as well as products.