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Among the given electrolytes , NaCl has lowest coagulating power . So , its flocculation value will be maximum .
Which of the following have maximum flocculation value?
As maximum flocculation value will be for the electrolyte having minimum coagulating power. Hence, \[{\text{NaCl}}\] 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 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.
Which has more flocculation power?
Coagulation destabilizes the particles while flocculation carries the particles away from the water. It means that the flocculating power is more for an ion having greater valency. More the valency of an ion more is the power of the ion to cause precipitation of the colloids. This is called Hardy-Schulze rule.
Which of the following 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 ion has maximum flocculation power?
So, according to the Hardy-Schulze rule, we can say that \[P{b^{4 + }}\] will have the highest flocculation value from given options.
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 has least flocculation power?
More is coagulating power , lesser is coagulation value .
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 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 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.
Which is not a colloidal solution?
Air is not a colloidal solution because it is a homogeneous mixture.
Which is not a method of purification of colloidal solution?
Colloidal solutions are not purified by electrophoresis. Movement of colloidal particles under the influence of electric field is called electrophoresis. So, it can make easier. Electrophoresis is the property of colloids not the purification method.
How do you calculate 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.
What is flocculation value explain its utility?
Flocculation value is defined as the minimum concentration required of an electrolyte to cause the coagulation or flocculation of a solution. It means that the flocculation value of an electrolyte is measured from the valency or charge.
Which ion has least flocculation value for a positive Sol?
PO4−3.
Which ions has highest negative heat of hydration?
The lithium-ion has by far the highest hydration enthalpy in Group 1 and the small fluoride ion has by far the highest hydration enthalpy in Group 7. Lithium exerts the greatest polarizing effect out of all the alkali metals on the negative ion.
Which ion has maximum precipitation value?
CO3−2.
Which among the following ion has highest negative heat of hydration?
The small lithium ion has by far the highest hydration enthalpy in Group1, and the small fluoride ion has by far the highest hydration enthalpy in Group 7. In both groups, hydration enthalpy falls as the ions get bigger.
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.
Which is used for ending charge on colloidal solution?
Ions of the electrolytes neutralise the charge on colloidal solutions.
Which of the following electrolytes numbered 1 through 5 has 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 is not shown by Sols?
Adsorption, Tynadall effect and flocculation are property of sols.
What is gold no in chemistry?
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. It was first used by Richard Adolf Zsigmondy.
How many phases are present in a colloid?
The Colloidal State The simplest colloids are made up of only two phases and, as in solutions, all combinations of the phases can occur.
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.
What is hardy Schulze rule give example?
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 is the main cause of charge on a colloidal solution?
The origin of the charge on the sol particles in most cases is due to the preferential adsorption of either positive or negative ions on their surface. The charge on the colloidal particles is balanced by the oppositely charged ions in the sol.
Why are colloidal solutions Coloured?
Larger particles absorb the light of longer wavelength and therefore transmit light of shorter wavelength. The colour of a colloidal solution depends upon the size of colloidal particles present in it. Larger particles absorb the light of longer wavelength and therefore transmit light of shorter wavelength.
What is flocculant made of?
One of the most common flocculants used in water purification today is aluminum sulfate (also known as alum); its chemical composition is shown in Figure 3. Figure 3. The chemical structure of aluminum sulfate (alum). Aluminum sulfate is a white, solid (powder) with a chemical formula of Al2(SO4)3.
Why is flocculation important?
Applying flocculation ensures a high flux over filtration units as well as efficient and cost effective separation of cell material from supernatant. Used water can contain significant amounts of suspended particulate matter, which often takes long to sediment.
What is the difference between flocculant and coagulant?
Coagulation is a chemical process. Flocculation is a physical process. Coagulants such as inorganic salts of aluminum or iron that neutralize the suspended particles are added during coagulation. Flocculant such as an organic polymer that involves in bridging and strengthening the flocs is added.
