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 […]
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 […]
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 […]
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 […]
Science > Chemistry > Surface Chemistry > Adsorption Adsorption is defined as the phenomenon in which there is the accumulation of one substance on the surface of the other substance. It can also be defined as the change in concentration at the interfacial layer between two phases of the system due to surface forces. OR It […]
Science > Chemistry > Chemical Equilibrium > Applications of Le-Chatelier’s Principle In this article we shall study the application of Le-Chatelier’s principle in Haber’s process, contact proces, etc. Statement of Le-Chatelier’s Principle: This principle is given by, a French chemist Le-Chatelier in 1888. It states that “If an external stress is applied to a reacting […]
Science > Chemistry > Chemical Equilibrium > Le-Chatelier’s Principle In this article, we shall study Le-Chatelier’s principle with examples. Statement: This principle is given by, a French chemist Le-Chatelier in 1888. It states that “If an external stress is applied to a reacting system at equilibrium, the system will adjust itself in such a way […]
Science > Chemistry > Chemical Equilibrium > Equilibrium Constant Characteristics of Equilibrium Constant: It has a definite value for every chemical reaction at a particular temperature. It is independent of the initial concentrations of the reacting species. It changes with the change in the temperature. It depends on the nature of the reaction. It is […]
Science > Chemistry > Chemical Equilibrium > Writing Expression for Equilibrium Constant In this article, we shall stuudy to write expression for equilibrium constant. Steps Involved in Writing Expression for Equilibrium Constant of a Reaction: Write the balanced chemical equation for the reaction. Write the products of equilibrium concentrations of the products in the numerator. […]
Science > Chemistry > Chemical Equilibrium > More Examples of Physical Equilibrium In this article, we shall study more examples of physical equilibrim and the dynamic nature of equilibrium. Dissolution of solids in liquids: It is not possible to dissolve just any amount of a solute in a given amount of solvent. A stage will […]