Table of Contents
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 has maximum flocculation value?
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.
Which of the following has highest flocculating power?
So, according to the Hardy-Schulze rule, we can say that \[P{b^{4 + }}\] will have the highest flocculation value from given options. So, the correct answer is “Option B”.
Which of the following electrolyte will have maximum flocculation value for AGI?
Therefore, NaCl will be having maximum flocculation value.
What is the flocculation value of electrolyte?
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 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.
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.
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.
Which has minimum flocculation power?
Flocculating power is inversely proportional to the coagulating power of the ion, as Pb+4 has the highest charge, it’s coagulating power is the highest thus the flocculating power is minimum.
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 has maximum flocculation value for positive Sol?
Maximum flocculation value will be for the electrolyte having minimum coagulating power. Hence, NaCl having lowest charge will have minimum coagulation power and hence, maximum flocculation value.
Which of the following electrolytes will have maximum coagulating value for fe2o3?
So, PO43− have highest charge hence highest coagulating power.
Is Congo Red Sol a positively charged Sol?
Based on the nature of the charge on the colloidal particles, colloidal solutions are classified as positively charged or negatively charged sols. Starch sol, metal sols like copper sol and gold sol, metal sulphide sols and acid dyes like Congo red, are examples of negatively charged sols.
What is the formula for flocculation value?
Complete step by step solution: “The minimum concentration of an electrolyte that is required to cause the coagulation or flocculation of a sol is known as flocculation value.” It is expressed in terms of millimoles per litre. 2 mL of 1 M NaCl contains 2 / 1000 mol = 2 millimole.
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 type of colloidal solution is fog?
A liquid dispersed in a gas is referred to as a fog. As we can see fog is an example of a colloid of tiny particles of water vapor and air. > Therefore, Fog is a colloidal solution of liquid dispersed in gas.
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.
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 flocculating ion?
Coagulation or precipitation:-it is a process of aggregating together the colloidal particle so as to change them into large sized particles which ultimately settles as a precipitate. The ion which is responsible for neutralization of charge on the colloidal particles is called the coagulating ion or Flocculating ion.
What is hardy Schulze rule Explain with examples?
The coagulating or flocculate capacity of an electrolyte increases with increase in charge is known as Hardy – Schulze law. Example 1: To coagulate a negative sol, the coagulating capacity of positive ion is Al+3 > Mg+2 > Na+ Example 2: To coagulate a positive sol the coagulating capacitor of negative ion.
What modification can you suggest in the Hardy?
Thus, Hardy-Schulze law can be modified in terms of the polarising power of the flocculating ion. Thus, the modified Hardy-Schulze law can be stated as ‘the greater the polarising power of the flocculating ion added, the greater is its power to cause precipitation. ‘.
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.
Which ion has least flocculation value for a positive solution?
PO4−3.
Is gelatin a positive sol?
Gelatin is positive sol.
Which of the following has highest and lowest flocculation value?
According to Hardy schulze, rule, greater the charge on the oppositely charged ion of the electrolyte added, more effective it is in bringing coagulation. Among the four electrolytes, NaCl has the lowest coagulating power, so its flocculation value will be maximum.
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.
Which ion has maximum precipitation value?
CO3−2.
Is alum a coagulant or flocculant?
To accomplish this, the water is treated with aluminum sulfate, commonly called alum, which serves as a flocculant. Raw water often holds tiny suspended particles that are very difficult for a filter to catch. Alum causes them to clump together so that they can settle out of the water or be easily trapped by a filter.
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.
What is flocculant made of?
Many flocculants are multivalent cations such as aluminium, iron, calcium or magnesium. These positively charged molecules interact with negatively charged particles and molecules to reduce the barriers to aggregation.
Which has maximum flocculation value?
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.
Which of the following has highest flocculating power?
So, according to the Hardy-Schulze rule, we can say that \[P{b^{4 + }}\] will have the highest flocculation value from given options. So, the correct answer is “Option B”.
Which of the following electrolyte will have maximum flocculation value for AGI?
Therefore, NaCl will be having maximum flocculation value.
What is the flocculation value of electrolyte?
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 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.
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.
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.
Which has minimum flocculation power?
Flocculating power is inversely proportional to the coagulating power of the ion, as Pb+4 has the highest charge, it’s coagulating power is the highest thus the flocculating power is minimum.
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 has maximum flocculation value for positive Sol?
Maximum flocculation value will be for the electrolyte having minimum coagulating power. Hence, NaCl having lowest charge will have minimum coagulation power and hence, maximum flocculation value.
Which of the following electrolytes will have maximum coagulating value for fe2o3?
So, PO43− have highest charge hence highest coagulating power.
Is Congo Red Sol a positively charged Sol?
Based on the nature of the charge on the colloidal particles, colloidal solutions are classified as positively charged or negatively charged sols. Starch sol, metal sols like copper sol and gold sol, metal sulphide sols and acid dyes like Congo red, are examples of negatively charged sols.
What is the formula for flocculation value?
Complete step by step solution: “The minimum concentration of an electrolyte that is required to cause the coagulation or flocculation of a sol is known as flocculation value.” It is expressed in terms of millimoles per litre. 2 mL of 1 M NaCl contains 2 / 1000 mol = 2 millimole.
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 type of colloidal solution is fog?
A liquid dispersed in a gas is referred to as a fog. As we can see fog is an example of a colloid of tiny particles of water vapor and air. > Therefore, Fog is a colloidal solution of liquid dispersed in gas.
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.
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 flocculating ion?
Coagulation or precipitation:-it is a process of aggregating together the colloidal particle so as to change them into large sized particles which ultimately settles as a precipitate. The ion which is responsible for neutralization of charge on the colloidal particles is called the coagulating ion or Flocculating ion.
What is hardy Schulze rule Explain with examples?
The coagulating or flocculate capacity of an electrolyte increases with increase in charge is known as Hardy – Schulze law. Example 1: To coagulate a negative sol, the coagulating capacity of positive ion is Al+3 > Mg+2 > Na+ Example 2: To coagulate a positive sol the coagulating capacitor of negative ion.
What modification can you suggest in the Hardy?
Thus, Hardy-Schulze law can be modified in terms of the polarising power of the flocculating ion. Thus, the modified Hardy-Schulze law can be stated as ‘the greater the polarising power of the flocculating ion added, the greater is its power to cause precipitation. ‘.
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.
Which ion has least flocculation value for a positive solution?
PO4−3.
Is gelatin a positive sol?
Gelatin is positive sol.
Which of the following has highest and lowest flocculation value?
According to Hardy schulze, rule, greater the charge on the oppositely charged ion of the electrolyte added, more effective it is in bringing coagulation. Among the four electrolytes, NaCl has the lowest coagulating power, so its flocculation value will be maximum.
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.
Which ion has maximum precipitation value?
CO3−2.
