Chapter 4, Problem 109AP

Interpretation Introduction

Interpretation:

The mass of the precipitate, ${\text{BaSO}}_4$, formed after the reaction between $\text{Ba}{\left(\text{OH}\right)}_2$ and ${\text{Na}}_2{\text{SO}}_4$, under the given composition, is to be determined.

Concept introduction:

Aredox reaction involves the transfer of electrons between two species. Hence, these reactions are divided into two parts, oxidation and reduction. In oxidation, the species loses electrons and in reduction the species gainselectrons.

From a balanced chemical equation, the mass of products formed and mass of reactants consumed can be determined. The number of moles of reactants consumed is equal to the number of moles of products formed (law of conservation of mass).

The number of moles of a compound is calculated by the expression as follows:

$M=\frac{m}{V}$

Here, M is concentration of reactants, m is number of moles of reactants, and V is the volume of reactants.