Related Experiment Video
Updated: Jul 17, 2025
Author Spotlight: Eco-Friendly Extraction of Bioactive Compounds Using Polyol-Based Microwave-Assisted Techniques
Published on: August 23, 2024
Physicochemical and sweetness behavior of kosmotropic and chaotropic ions in aqueous solutions of polyhydroxy
Uzma Shahazidy1, Muhammad Asghar Jamal1, Bushra Naseem2
1Department of Chemistry, Government College University Faisalabad, 38000, Pakistan.
Abstract:
Hydrated ions have essential applications in biochemical processes. The objective of the present work is to study the behaviour of kosmotropic and chaotropic ions in aqueous solutions of polyhydroxy compounds in terms of sweetness response, volumetric and acoustic parameters such as apparent molar volume (∅v), apparent specific volume (ASV), compressibility (∅k0) etc. at different temperatures 20 °C - 45 °C and 101 kPa. The positive ∅v values of arabitol showed more kosmotropic nature for Na+ ion developing more stabilize structure of arabitol with water through strong hydrogen bonding, while the presence of K+ and Cl- form weak hydrogen bonding with water termed as chaotropic ions. The ASV values showed that arabitol remained sweet in the presence of electrolytes. The negative results of ∅k0 for arabitol in aqueous electrolytic solutions give valuable information about interactions occurring among solute, electrolytic ions, and water molecules. The structure-making/breaking behaviour has been observed by Hepler's constant (∂2∅vo/∂T2)p.
More Related Videos
Related Concept Videos
02:42Aqueous Solutions and Heats of Hydration
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
03:38Polyprotic Acids
03:24Common Ion Effect
02:12Solvating Effects
03:00Solubility
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
02:54Ions as Acids and Bases
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation: