Advertisements
Advertisements
प्रश्न
What modification can you suggest in the Hardy-Schulze law?
Advertisements
उत्तर
Hardy-Schulze law states that ‘the greater the valence of the flocculating ion added, the greater is its power to cause precipitation.
This law takes into consideration only the charge carried by an ion, not its size. The smaller the size of an ion, the more will be its polarising power. 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.
संबंधित प्रश्न
What is the reason for the stability of colloidal sols?
Define the following term:
Zeta potential
Define the following terms: Associated colloids
Give reasons for the following observations:
Brownian movement provides stability to the colloidal solution.
Define the following term : Brownian movement
Explain what is observed when a beam of light is passed through a colloidal sol.
Explain the terms Coagulation
What happens when a freshly prepared precipitate of Fe(OH)3 is shaken with a small amount of FeCl3 solution?
A colloidal sol is prepared by the given method in the figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube? How is the sol represented?
Which of the following statements are correct?
(i) Mixing two oppositely charged sols neutralises their charges and stabilises the colloid.
(ii) Presence of equal and similar charges on colloidal particles provides stability to the colloids.
(iii) Any amount of dispersed liquid can be added to emulsion without destabilising it.
(iv) Brownian movement stabilises sols.
Why do we add alum to purify water?
Assertion: An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles.
Reason: Pore size of the filter paper becomes more than the size of colloidal particle.
Which of the following is used for removing change on colloidal solution?
The right option for the statement “Tyndall effect is exhibited by”, is:
What is electrophoresis?
Why a negatively charged sol is obtained when AgNO3 solution is added to KI solution?
Which of the following is a correct statement?
Coagulation value of the electrolytes AlCl3 and NaCl for As2S3 sol are 0.093 and 52 respectively. The No. of times AlCl3 has greater coagulating power than NaCl is ______.
