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Tag: Chemistry

Properties of Colloids

Science > Chemistry > Colloids > Properties of Colloids In this article, we shall study the general, mechanical and optical properties of colloids. General Properties of Colloids: Heterogenous Character: The ultramicroscopic examination indicates that colloidal dispersion is a heterogeneous system consisting of a continuous dispersion medium and discontinuous disperse phase. Visibility: Colloidal particles cannot be seen […]

Physical Chemistry

The Naming of Chemical Compounds

Post author By Hemant More
Post date April 4, 2020
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Science > Chemistry > Introduction to Chemistry > Naming of Chemical Compounds In this article, we shall study the method of naming of chemical compounds In a chemical reaction, the molecular composition changes and it is represented by a chemical equation. In a chemical equation, the various substances involved as reactants or products are written […]

Tags Chemical formula of compound, Chemical formula of element, Chemistry, Ions, Naming acids, Naming bases, Naming binary compounds, Naming salts, Negative radicals, Positive radicals, Radicals, Symbol of an element

Inorganic Chemistry

Halogens

The five elements; Fluorine (F), Chlorine (Cl), Bromine(Br), Iodine (I) and Astatine (At) belonging to VII A Group of the modern periodic table are collectively referred as halogens. The last element Astatine is radioactive and is very short lived hence generally excluded from the study. The word halogen is derived from the Greek words Halos […]

Physical Chemistry

Preparation of Colloids

Science > Chemistry > Colloids > Preparation of Colloids In this article, we shall study different methods of preparation of colloids. Preparation of Lyophilic Sols: For preparing lyophilic sol, the dispersed phase is directly added to dispersion medium in cold or by warming. Colloidal solutions of starch, glue, gelatin, etc. in water can be prepared […]

Physical Chemistry

Associated Colloids (Micelles)

Post author By Hemant More
Post date April 3, 2020
1 Comment on Associated Colloids (Micelles)

Science > Chemistry > Colloids > Associated Colloids (Micelles) In thisarticle, we shall study bout associated colloids :micelles). Multimolecular Colloids: Multimolecular colloids are those systems in which the dispersed phase particles are aggregates of many atoms or molecules. The particles in this colloidal solutions are held together by van der Wall’s forces. e.g. gold sol particles […]

Physical Chemistry

Types of Colloidal Solutions

Post author By Hemant More
Post date April 3, 2020
1 Comment on Types of Colloidal Solutions

Science > Chemistry > Colloids >Types of Colloidal Solutions In this article, we shall study types of colloidal solutions (systems) on the basis of states of the dispersed phase and dispersion medium, the interaction between the dispersed phase and dispersion medium, and on the number of atoms and molecules in a colloidal particle. Types of […]

Physical Chemistry

Introduction to Colloids

Science > Chemistry > Colloids > Colloidal Solutions Depending upon the size of particles in solution, solutions are classified as true solutions, colloidal solutions, and suspensions. In this article, we shall study colloids i.e. colloidal solutions. Historical Background: The foundation of colloidal chemistry was laid by English chemist Thomas Graham in 1861. Other prominent chemists […]

Tags Chemistry, Colloidal dispersions, Colloidal solution, Colloidal state, Colloids, Crystalloids, Dispersed phase, Dispersion medium, Solution, Suspension, True solution

Physical Chemistry

Applications of Adsorption

Post author By Hemant More
Post date April 3, 2020
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Science > Chemistry > Surface Chemistry > Applications of Adsorption In this article, we shall study some applications of adsorption. Adsorption Indicators: The phenomenon of adsorption is used to detect the endpoints of precipitation titrations. In such titrations, dyestuffs like eosin, fluorescein, alizarin red etc, are used as adsorption indicators. At the endpoint of the […]

Physical Chemistry

Application of Adsorption: Catalysis

Post author By Hemant More
Post date April 3, 2020
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Science > Chemistry > Surface Chemistry > Application of Adsorption: Catalysis In this article, we shall discuss very important application of the phenomenon of adsorption, called catalysis. Remaining applications are discussed in the next article. Catalyst: A catalyst is defined as a substance which when added to the reacting system increases the rate of the […]

Physical Chemistry

Factors Affecting Adsorption

Post author By Hemant More
Post date April 3, 2020
2 Comments on Factors Affecting Adsorption

Science > Chemistry > Surface Chemistry > Factors Affecting Adsorption In last article, we have studied the meaning of terms like adsorption, absorption, adsorbate, adsorbent. In this article, we shall study the factors affecting adsorption. The Extent of Adsorption: The quantity of an adsorbate that is adsorbed per unit mass of adsorbent is called extent […]

Tags Absorption, Adsorbate, Adsorbent, Adsorption, Adsorption enthalpy, Adsorption isotherm, Chemical adsorption, Chemisorption, Chemistry, Desorption, Extent of adsorption, Freundlich adsorption isotherm, Heat of adsorption, Physical adsorption, Surface chemistry