Table of Contents
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 of the following electrolytes is most effective for the coagulation of?
Which of the following electrolytes is most effective in the coagulation of gold solution? K4[Fe(CN)6] is most effective in the coagulation of gold solution .
Which electrolyte is most effective for the coagulation of CDS Sol?
Fe3+ can be used for coagulation of As2S3 sol.
Which electrolyte is most effective for the coagulation of Fe OH 3 Sol?
Hence Na₃PO₄ is most effective electrolyte for the coagulation of Fe(OH)₃ sol which is a positively charged sol.
Which of the following is most effective in coagulation of a sol?
Gelatin is a negatively charged In the coagulation of a negative sol, Al3+ is most effective. Because higher the charge on the coagulating ion, more is the coagulation.
Which electrolyte is most effective?
Fe(OH)3 is a positively charged sol. According Hardy Schulze rule, greater the charge on an oppositely charged ions of the electrolyte added, more effectively it is in bringing about the coagulation, Hence, Na3PO4 (containing PO3-4 inos) is more effective.
Which of the following electrolytes is most effective?
MgCl2 is most effective in the coagulation of Gold sol. Gold sol is negatively charged. The electrolyte having positive ions with maximum valency will be most effective in causing its coagulation (Hardy Schulze rule).
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 of the following electrolyte will be most effective in coagulation of negative?
Hint: Ferric hydroxide is a positive charged colloidal solution. It coagulates negatively charged particles. Higher the negative charge more effective is the coagulation.
Which of the following electrolyte will be most effective in coagulation of negative soul?
It is obvious that cations are effective in coagulating negative sols. According to Hardy Schulze rule, greater the valency of the coagulating ion, greater is its coagulating power. Thus, out of the given, AICI3(Al3+) is most effective for causing coagulation of As2S3 sol.
Which of the following is most effective in coagulation of Al OH 3?
Al(OH)3 is positively charged sol. K3PO4 has greater negative charge. Hence, it is most effective in coagulation of AlOH)3 sol.
Which of the following electrolytes is least effective?
(ii) Greater the charge on ion causing coagulation, higher will be its coagulating power. ∴Fe(OH)3 is positively charged sol. ∵ In KBr,Br− has smallest negative charge among given choices. ∴ It will be least effective in coagulating Fe(OH)3.
What happens when a freshly precipitated Fe OH 3?
Answer: When freshly precipitated Fe(OH)3 is shaken with little amount of dilute solution of FeCl3(electrolyte). Peptization process (ions of the electrolyte are adsorbed by the precipitate particles) takes place by converting the Fe(OH)3 precipitate into colloidal solution positively charged solution of Fe(OH)3.
Which of the following electrolytes will be most effective in the coagulation of 2 as2s3sol and why AlCl3 bacl2 NaCl?
Na3PO4, MgCl2, CaCl2, AlCl3. As2S3 is a negatively charged sol, the negative charge is due to adsorption of S2– ions on the sol. For coagulation wen nedd oppositely charged sol i.e. positively charged sol. Thus the most effective flocculant will be AlCl3 as Al has +3 charge on it.
Is gold a sol?
Gold sol being a sol of gold (Au) metal is thus, a lyophobic sol. Metal sols are generally negatively charged. Therefore, gold sol is also a negative charged sol. Macromolecular colloids are formed when macromolecules having large molecular masses are dissolved in a dispersion medium.
Is Haemoglobin a positively charged sol?
Note: Haemoglobin in blood is positively charged. It is inside the red blood cell. Examples of positively charged sols: Haemoglobin, metal hydroxides, basic dyes, etc. Examples of negatively charged sols: Metal sols, metal sulphides, gold sols, blood, starch, acidic dyes, etc.
Which of the following is electrolyte?
A substance that dissociates into ions in solution acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, magnesium, and phosphate are examples of electrolytes.
Which is positively charged Sol?
Haemoglobin (blood) is the positively charged Gold sols, clay and As2S3 are the examples of negatively charged sols.
Which of the following electrolytes is negatively charged?
The predominant positively charged electrolytes in the body are sodium, potassium, calcium , and magnesium, while negatively charged electrolytes include chloride, phosphates, and bicarbonate.
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 Hardy Schulze law?
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. ‘.
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.
Is Sulphur sol positive or negative?
As As2S3 is sulphide of metal As it is a negatively charged sol.
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 reaction gives colloidal solution?
Colloidal solutions can be prepared by chemical reactions leading to formation of molecules by double decomposition, oxidation, reduction or hydrolysis.
Which of the following will be most effective in the coagulation of fe2o3 xh2o?
K4[Fe(CN)6] is the most effective electrolyte on the coagulation of Fe2O3.
Which is the most effective colloid?
K4[Fe(CN6] is the most effective because [Fe(CN6]-4has the maximum coagulating power.
Which of the following is most active in coagulating Fe OH 3?
Answer: Ferric hydroxide Fe(oH)3 is a positively charged solution. To coagulate we need a negatively charged solution.
Which of the following electrolytes is most effective coagulating agent for Sb2S3?
Most effective coagulating agent for Sb2S3 is Al2(SO4)3 because of high charge.
Which of the following is least effective in causing flocculation?
KBr is least effective in causing fllocculaton of ferric hydroxide sol sue to minimum charge at (KBr)Br.
Which of the following electrolytes have maximum coagulating power?
NaCl will be having maximum coagulating value.
