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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 .
How do you calculate flocculation?
It is calculated by dividing the liquid volume (in gallons) of a basin by the plant flow rate (gallons per minute).
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.
How do you find the flocculation value of NaCl?
If 500 mL of arsenious sulphide sol requires 2 millimoles of NaCl. So, 1000 mL of arsenious sulphide sol requires 2×2 = 4 millimoles of NaCl. Therefore, flocculation value of NaCl = 4.
What is the flocculation value of NaCl when 5ml of 1M?
For the coagulation of 100 ml of arsenious sulphide solution, 5ml of 1M NaCl is required. Calculated the flocculation value . The minimum number of moles of electrolyte per litre required to cause precipitation is called flocculation value. Flocculating value of NaCl is 50 millimole L-1.
What is flocculant for?
Flocculant refers to the chemical or substance added to a suspension to accelerate the rate of flocculation or to strengthen the flocs formed during flocculation.
Which has maximum flocculation power?
Lower the coagulation value, more efficient is the electrolyte in causing coagulation of sol. We can say coagulation value is inversely proportional flocculation value. having lowest charge will have minimum power and hence have maximum flocculation value. Thus, the correct option is C.
What is flocculating power?
Hint: Flocculating value or the coagulating value is the amount of the electrolyte which is needed so that 1 litre of colloidal solution precipitates easily. The coagulating power or flocculating power is the reciprocal of coagulating value or flocculating value.
Which has minimum flocculation value?
The minimum concentration of an electrolyte required to cause coagulation of a sol is called its flocculation value. It is expressed in millimoles per litre. If the flocculation value of MgSO4 for standard As2S3 sol is 3.33.
Is soap a sol?
A sol is a combination of a solid that is evenly dispersed throughout a fluid. Since, in Soap dispersion medium is liquid and dispersed phase is gas. And after going through the classification of colloidal solution as written above, we can simply conclude that Soap is an example of Foam.
What is the coagulating value of NaCl?
Answer: The coagulation value of NaCl is 50 .
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 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 are floc particles?
Flocculation is a two-step particle aggregation process in which a large number of small particles form a small number large flocs. Step 1: Coagulation. Small particles usually carry negative surface charges that hinder aggregation and settling (1a).
Which of the following electrolyte will have maximum flocculation value for Fe OH 3 Sol?
To coagulate Fe(OH)3 -ve charged electrolyte is used and greater the value of -ve charge ,coagulating power will be strong . Among the given electrolytes , NaCl has lowest coagulating power . So , its flocculation value will be maximum .
Which of the following salt solution is most effective for coagulation of Arsenious sulphide?
Hence, the AlCl3 AlC l 3 salt containing the trivalent Al3 + A l 3 + cation will be the most effective for coagulation of arsenious sulphide sol.
What is an example of a flocculant?
Flocculation and coagulation treatment chemicals are used in effluent wastewater water treatment processes for solids removal, water clarification, lime softening, sludge thickening, and solids dewatering. Examples of ChemTreat coagulation products include aluminum salts, iron salts, and polyelectrolytes.
What makes a good flocculant?
Polymers are useful as flocculants because they are robust molecules and sometimes carry charges. Because they are so large, small particles can get trapped in the curves of the polymer causing them to accumulate a mass heavy enough to prevent their retention in solution.
How often can you use flocculant?
You can reuse a clarifier after 5-7 days, but if you’re constantly seeing cloudy water, there may be other problems. Adding too much flocculant can cause its own issues.
Which ion has maximum flocculation value for a positive sol?
Fe(OH)3 is positively charged. Hence Cl- ions with minimum opposite charge will have maximum flocculation value (minimum cagulating power).
Which ion has maximum precipitation flocculation value?
CO3−2.
Which ion has least flocculation value for a positive sol?
PO4−3.
What is Peptization give an example?
Peptization is the method of producing stable colloids using an electrolyte to split up and distribute a precipitate into the colloids. Example: When the ferric chloride is added to the precipitate of ferric hydroxide, the hydroxide precipitate transfer to the sol by absorbing ferric ions.
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.
What is Tyndall effect?
Tyndall effect, also called Tyndall phenomenon, scattering of a beam of light by a medium containing small suspended particles—e.g., smoke or dust in a room, which makes visible a light beam entering a window. The effect is named for the 19th-century British physicist John Tyndall, who first studied it extensively.
Which has least flocculation power?
More is coagulating power , lesser is coagulation value .
Is AS2S3 positively charged?
Since, AS2S3 is a negatively charged sol, the ion bearing the highest positive charge, is more effective for its coagulation. Al3+ has the highest positive charge, ie, +3, so it is more effective for the coagulation of AS2S3 sol.
