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“The minimum concentration of electrolyte in millimoles required to cause coagulation of one litre of colloidal solution is called coagulation value”. Additional Information: Coagulation is also known as flocculation or precipitation.
How is coagulation value calculated?
Explanation: Coagulation value is the millimoles of an electrolyte that must be added to 1 L of a colloidal solution for complete coagulation . Therefore , 5 mL of 1 M NaCl = 11000×5=0.005 or 5 m moles .
What is coagulation value or flocculation value?
Coagulation value is the millimoles of an electrolyte that must be added to 1 L of a colloidal solution for complete coagulation. The minimum concentration of an electrolyte which is required to cause the coagulation or flocculation of a sol is known as flocculation value.
What is coagulation class 12th?
Coagulation is the precipitation of colloids by removal of the charge associated with colloidal particles. Colloidal particles carry same charge on their surfaces. Due to charge, colloidal solution is stable.
Which has higher coagulating value?
To find : Which one has higher coagulating power. solution : coagulating value : The minimum concentration of an electrolyte which is required to cause coagulation is known as coagulating value. coagulating value is inverse of coagulating power. i.e., lower the coagulating value, higher is the coagulating power.
What is coagulation power?
The powerful particles of the electrolyte in achieving coagulation are those which convey charge inverse to that of the colloidal particles. These particles are called coagulating particles. So, according to this rule, greater the charge on an oppositely charged ion, greater is its coagulation power.
What is the formula for finding gold number?
Gold number is calculated by know the number of milligrams of protective colloid which is sufficient to prevent the coagulation of 10 ml of standard gold solution when 1 ml of 10% solution of sodium chloride is added to it.
What is the coagulation process?
Coagulation is the chemical water treatment process used to remove solids from water, by manipulating electrostatic charges of particles suspended in water. This process introduces small, highly charged molecules into water to destabilize the charges on particles, colloids, or oily materials in suspension.
How coagulation can be brought about?
(1) By electrophoresis: In electrophoresis the colloidal particles move towards oppositely charged electrode. Coagulation is generally brought about by the addition of electrolyte. Charge ; Solvation; When the above two factors are removed then only lyophilic sols can be coagulated.
What is mutual coagulation?
Mutual coagulation is the destabilisation if colloids by neutralizing the electric charge of the dispersed phase particles which result in aggregation of the colloidal particles.
What is called coagulation?
Coagulation: In medicine, the clotting of blood. The process by which the blood clots to form solid masses, or clots. More than 30 types of cells and substances in blood affect clotting. The process is initiated by blood platelets. The blood cells and plasma are enmeshed in the network of fibrils to form the clot.
What is coagulation with example?
Coagulation is the process of changing from a liquid to a gel or solid, for example, the process that results in the formation of a blood clot. Coagulation, or clotting of the blood, appears to be vitamin K’s sole function.
When two oppositely charged colloids are mixed together?
Two oppositely charged sols when mixed in almost equal proportions, neutralise their charges and get partially or completely precipitated. Such type of coagulation is called mutual coagulation.
What is hardy Schulze rule?
> Hardy Schulze rule states that the amount of electrolyte required for the coagulation of a definite amount of a colloidal solution is dependent on the valency of the coagulating ion. Hardy and Schulze observed that greater the valency of the flocculating ion or coagulating ion, the greater is its power to coagulate.
What is the relationship between coagulation value and coagulation power?
Coagulation power is inversely proportional to coagulation value.
What is flocculation value?
Flocculation value is defined as the minimum concentration required of an electrolyte to cause the coagulation or flocculation of a solution. Flocculation value is inversely proportional to the coagulating power of the ion.
What is difference between coagulation and flocculation?
Coagulation: Particles that aggregate with themselves e.g. by the influence of a change in pH. Flocculation: Particles that aggregate by the use of polymers that binds them together.
Is coagulation and clotting the same thing?
Coagulation, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot. It potentially results in hemostasis, the cessation of blood loss from a damaged vessel, followed by repair.
Which ion is most effective in coagulation blood?
K3[Fe(CN)6] is most effective in coagulating a ferric hydroxide sol.
What is gold number explain with example?
The Gold Number is the minimum weight (in milligrams) of a protective colloid required to prevent the coagulation of 10 ml of a standard hydro gold sol when 1 ml of a 10% sodium chloride solution is added to it. The sodium chloride ions disrupt this electrical double layer, causing coagulation to occur.
What is the golden number of Gelatene?
The gold number of gelatin is 0.01.
What is starch gold number?
By definition gold number of starch is the amount of starch in mg added to 10 ml standard gold sol which prevents the coagulation of gold on adding 1 ml of 10% NaCl solution. So the amount of starch is 0.25g = 250 mg. Hence gold number is 250.
What are the 4 steps of coagulation?
1) Constriction of the blood vessel. 2) Formation of a temporary “platelet plug.” 3) Activation of the coagulation cascade. 4) Formation of “fibrin plug” or the final clot.
Is coagulation good or bad?
Blood clotting is a natural process; without it, you would be at risk of bleeding to death from a simple cut. Blood clots inside the cardiovascular system are not always so welcome. A clot in the coronary arteries near the heart can cause a heart attack; one in the brain or the arteries serving it, a stroke.
What are the three phases of coagulation?
The three phases of coagulation occur on different cell surfaces: Initiation on the tissue factor-bearing cell; Amplification on the platelet as it becomes activated; and Propagation on the activated platelet surface. Based on our work and that of many other workers, we have developed a model of coagulation in vivo.
