Coagulation class 12

Coagulation is a process that involves colloidal particles coming together to form larger particles coagulation class 12 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.

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.

Coagulation class 12

Coagulation techniques:. Byju's Answer. What is coagulation? Open in App. Coagulation: Coagulation is the aggregation or accumulation of colloidal particles to form a precipitate. Coagulation is caused by the removal of colloidal particle charge. On their surfaces, colloidal particles have the same charge. A colloidal solution is stable due to charge. The electrostatic force of repulsion between similarly charged particles keeps them from colliding and forming larger particles. The repulsion between them ends when the charge is removed. As the particles become closer, their size increases, resulting in precipitation. Coagulation techniques: Electrophoresis: In this method, the colloidal particles move towards the oppositely charged electrodes and get discharged and precipitated. Persistent dialysis: In this method, the parts of electrolytes are removed completely and the colloidal solution finally coagulates.

The coagulating ion, also known as a flocculating ion, is the ion that is responsible for neutralising the charge on colloidal particles.

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. Because colloidal particles have surface electrical charges that repel each other, particles settle very slowly or not at all in a colloidal suspension. This surface charge is commonly measured in terms of zeta potential, which is the electrical potential at the slipping plane.

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. Some special methods are used to make their colloidal solutions. Such kinds of sols are known as lyophobic sols.

Coagulation class 12

Coagulation techniques:. Byju's Answer. What is coagulation? Open in App. Coagulation: Coagulation is the aggregation or accumulation of colloidal particles to form a precipitate. Coagulation is caused by the removal of colloidal particle charge. On their surfaces, colloidal particles have the same charge. A colloidal solution is stable due to charge.

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Post My Comment. Addition of electrolytes: When excess amount of electrolyte is added, then the colloidal particles are precipitated. Frequently Asked Questions. Share via. Hardy Schulze Law 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. Through this article, readers will get deep insights into the concepts of what is atmosphere, the different layers of atmosphere and various reactions taking place in different layers of the atmosphere. Other chemicals, such as ferric sulphate or sodium aluminate, could be used as well. Your Mobile number and Email id will not be published. Because of the imbalance in the milk, it starts to accumulate together and gets coagulated. What are Colloidal Solutions? Coagulation is a chemical process that causes the destabilisation of non-settleable particles. Watch Now. If we can remove the charge on the sol, the particles get closer to each other and accumulate to form aggregates, which precipitate under the influence of gravity. 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.

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.

Coagulating ion is an ion in the electrolyte which neutralises the opposite charge on colloid and coagulates it. Target Exam Learn more. 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. The doctor will sterilise a spot on the back of our hand or inside our elbow. Read full. Primary haemostasis is caused by platelet aggregation and the formation of a plug at the site of injury, whereas secondary haemostasis is caused by the formation of a network of fibrin threads, which strengthens and stabilises the platelet plug. The coagulation is, in fact, caused by the charge on the ion. A catalyst is a material that is not consumed by a chemical process but reduces the activation energy of the reaction. If we can remove the charge present on the sol, the particles get closer to each other, and they accumulate to form aggregates and precipitate under the action of gravity. This was just a brief layout of the coagulation of lyophilic and lyophobic colloids.