Thermodynamic Analysis of the Solubility of Salts in Aqueous and Non-Aqueous Media

CHAPTER ONE

1.1 Background to the Study

The solubility of ionic compounds is influenced by several thermodynamic parameters such as enthalpy, entropy, and Gibbs free energy. Understanding these parameters provides insight into the molecular interactions between solute and solvent molecules. The behavior of salts in different solvents, both aqueous and non-aqueous, has practical relevance in pharmaceuticals, electrochemistry, and environmental chemistry (Atkins & De Paula, 2020).
Thermodynamic studies help to explain why some salts dissolve readily in water but not in organic solvents and vice versa. This understanding assists in the development of solvent systems for various chemical processes (Laidler, 2018).

1.2 Statement of the Problem

While aqueous solubility data for common salts are well-documented, comparative studies involving non-aqueous solvents are limited. There is a need to evaluate the thermodynamic parameters influencing solubility in different media to enhance industrial and laboratory applications.

1.3 Objectives of the Study

1. To determine the solubility of selected salts in aqueous and non-aqueous solvents.

2. To analyze the thermodynamic parameters governing solubility.

3. To compare the solvation behavior in polar and non-polar solvents.

1.4 Significance of the Study

The findings will improve understanding of solvent–solute interactions and support the optimization of processes in industries such as pharmaceuticals, where solubility plays a critical role in drug formulation and bioavailability.

1.5 Scope of the Study

The research will focus on a comparative thermodynamic study of selected salts in both aqueous and non-aqueous solvents under controlled temperature conditions.