Coagulation class 12

Coagulation techniques:.

Coagulation flocculation in water treatment involves the addition of compounds that promote the clumping of fines into larger flocs, allowing them to be more easily separated from the water. Coagulation is a chemical process that involves charge neutralisation, whereas flocculation is a physical process that does not involve charge neutralisation. Coagulation-flocculation can be used as a preparatory or intermediate step between other water or wastewater treatment processes such as filtration and sedimentation. Although iron and aluminium salts are the most commonly used coagulants, salts of other metals such as titanium and zirconium have also been found to be highly effective. The type of coagulant used, its dose and mass; the pH and initial turbidity of the water being treated; and the properties of the pollutants present all have an impact on coagulation.

Coagulation class 12

Coagulation is a process that involves colloidal particles coming together to form larger particles that eventually settle as residue or float on the surface. Coagulation is the transformation of blood from a liquid to gel, resulting in the formation of blood clots. It could lead to hemostasis or the cessation of blood loss from a damaged vessel and then repair. The addition of electrolytes usually causes coagulation to take place. The coagulating ion, also known as a flocculating ion, is the ion that is responsible for neutralising the charge on colloidal particles. The neutral particles then begin to clump together to form larger particles that settle down. Heterogeneous systems with dispersed particle sizes ranging from 1 nm to nm i. The valency of an ion with an opposite charge to the colloidal particles determines the amount of electrolyte required to coagulate a specific amount of colloidal solution. The electrolyte ions, that are most effective in causing coagulation, are those which have the opposite charge as the colloidal particles. Coagulating ions are the ions that cause the blood to clot.

Open in App. Suspended particles cannot be completely removed by settling alone.

Colloids are an important class of heterogeneous mixtures which are formed by mixing dispersed phase with the dispersion medium. Most substances like creams, milk, curd, and medicines are colloids. Colloids show special features like the Tyndall effect and the Brownian movement. In this article, there is a detailed discussion about the coagulation of colloids. Coagulation is a process of aggregation or accumulation of colloidal particles to settle down as a precipitate. Substances like metals, their sulfides etc cannot be simply mixed with the dispersion medium to form a colloidal solution.

The ions of the electrolytes are adsorbed on the sol. For example: In the presence of a large excess of the electrolyte, the charge on the particles of the dispersed phase is neutralised and as a result, they come closer, grow in size and ultimately form precipitates. Thus, the phenomenon of precipitation of a colloidal solution by the addition of excess of an electrolyte is called coagulation or flocculation. When an electrolyte is added to the sol. As a result, their charge gets neutralised and this causes the uncharged particles to come closer and to get coagulated or precipitated.

Coagulation class 12

Colloids are an important class of heterogeneous mixtures which are formed by mixing dispersed phase with the dispersion medium. Most substances like creams, milk, curd, and medicines are colloids. Colloids show special features like the Tyndall effect and the Brownian movement. In this article, there is a detailed discussion about the coagulation of colloids. Coagulation is a process of aggregation or accumulation of colloidal particles to settle down as a precipitate. Substances like metals, their sulfides etc cannot be simply mixed with the dispersion medium to form a colloidal solution.

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What is coagulation? Negatively charged colloidal particles, for example, are coagulated with alum to form positively charged ions. As a result, this charge gets neutralised, and the uncharged particles become coagulated. Both pathways converge at a point, resulting in fibrin activation and the formation of the fibrin network. Hydrochloric Acid Formula. Which is an example of coagulation? Answer: Coagulation is a process to aggregate colloidal particles to transform them into larger particles that eventually settle as a precipitate. Grade It is a type of colloid in which the dispersed phase is solid, but the dispersion medium is fluid. Surface Chemistry: Coagulation Coagulation is a process that involves colloidal particles coming together to form larger particles that eventually settle as residue or float on the surface. Hence the modified law will be as the greater is the power of flocculating ion added, the higher will be its power to cause precipitation.

Coagulation techniques:. Byju's Answer.

Colloids show special features like the Tyndall effect and the Brownian movement. Such kinds of sols are known as lyophobic sols. Causes of Coagulation Coagulation of Lyophobic Sol can be caused by the following: By Prolonged Dialysis: The presence of a small quantity of electrolyte in a colloidal sol gives it stability. Coagulation is a chemical process that involves charge neutralisation, whereas flocculation is a physical process that does not involve charge neutralisation. An electrode is a good source of conducting electricity as it is a solid conductor, in other words we can use Anode and Cathode. Describe briefly the cleansing action of soap. Access free live classes and tests on the app. Rapid mixing ensures that the coagulants are evenly distributed throughout the water and that the chemical reaction is complete. View Result. Coagulation can be used as a pre or post-treatment step in water or wastewater treatment processes such as filtration and sedimentation. Coagulation treatment is typically performed before sedimentation and filtration. A catalyst is a material that is not consumed by a chemical process but reduces the activation energy of the reaction.