Home
Class 12
CHEMISTRY
The coagulating power of electrolytes ha...

The coagulating power of electrolytes having ions `Na^+`, `Al^(3+)` and `Ba^(2+)` for arsenic sulphide sol increases in the order

A

`Al^(3+)< Na^(+)< Ba^(2+)`

B

`Al^(3+)< Ba^(2+) < Na^(+)`

C

`Na^(+)< Ba^(2+) < Al^(3+)`

D

`Ba^(2+) < Na^(+) < Al^(3+)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • SURFACE CHEMISTRY

    MODERN PUBLICATION|Exercise EXERCISE|411 Videos

  • STRUCTURE OF ATOM

    MODERN PUBLICATION|Exercise EXERCISE|102 Videos

Similar Questions

Explore conceptually related problems

The coagulating power of an electrolyte for arsenious sulphide sol decreases in the order :

coagulation is the process by which the dispersed phase of a colloid is made to aggregate and thereby separate from the continuous phase. The minimum concentration of an electrolyte in mili-moles per litre of the electrolyte solution which required to cause the coagulation of colloidal sol is called coagulation value . therefore higher is the coagulating power of effective ion, smaller will be the coagulation value of the electrolyte. the coagulation of colloidal particles to the sol can be caused by : heating, adding electrolyte, adding oppositely charged sol, all of these.

The particles of colloidal solution possess electrical charge which is responsible for the stability of these solutions. The charge on colloidal particles arises because of selective adsorption of ions which are common with their own lattice. The presence of charge on colloidal particles can be determined with the help of phenomenon known as electrophoresis. However, when some electrolyte is added, the charge -on the particles of dispersed phase gets neutralized and precipitation takes place. This process is also called coagulation. The coagulation is given by Hardy Schulze rules. According to these rules the ions carrying the charge opposite to that of sol particles are effective and coagulating power of an electrolyte is directly propdrtional to the fourth power of the valency of the ion. Coagulation can also occur by mutual precipitation, by electrophoresis, by persistent dialysis or by heating or cooling. What happens to the charge of particles when electrolyte is added ?

The particles of colloidal solution possess electrical charge which is responsible for the stability of these solutions. The charge on colloidal particles arises because of selective adsorption of ions which are common with their own lattice. The presence of charge on colloidal part!cles can be determined with the help of phenomenon known as electrophoresis. However, when some electrolyte is added, the charge on the particles of dispersed phase gets neutralized and precipitation takes place. This process is also called coagulation. The coagulation is given by Hardy Schulze rules. According to these rules the ions carrying the charge opposite to that of sol particles are effective and coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ion. Coagulation can also occur by mutual precipitation, by electrophoresis, by persistent dialysis or by heating or cooling. Which charge is responsible for stability of colloidal particles ?

Assertion : Coagulation power of Al^(3+) is more than Na^(+) . Reason : Greater the valency of the flocculating ion added greater is its power to cause precipitation (Hardy Schulze rule) .

Among the following which is/are correct statement about the metal sulphide sols ? the sol particles are positively charged due to preferential adsorption of metal ions, the sol particles are negatively charged due to preferential adsorption of sulphide ions, the cations of added electrolytes are effective in causing the coagulation of the sol, the sol is due to both the electric charge and hydration of the particles.

coagultion is the process by which the dispersed phase of a colloid is made to aggregate and thereby separtate from the continuous phase. The minimum concetration of an eletrolyte in milli-moles per litre of the electrolyte solution which required to cause the caogultion of colloidal sol is called coagution value . therefroe higher is the coagulatings power of effective ion, smaller will be the coagultion value of the electrolyte. coagultion value propto = 1/("coagulating power") the coagulation values of differnt electrolytes are different . this behavious can be easily uderstood by Harby - schulze rule which states. the greater is the valency of the effective ion grreater is its coagulating power," which one had the highest coagulating powe?

coagultion is the process by which the dispersed phase of a colloid is made to aggregate and thereby separtate from the continuous phase. The minimum concetration of an eletrolyte in milli-moles per litre of the electrolyte solution which required to cause the caogultion of colloidal sol is called coagution value . therefroe higher is the coagulatings power of effective ion, smaller will be the coagultion value of the electrolyte. the ability of an ion to bring about coagulation of a given colloid depends upon :

Given below are a few electrolytes, indicate which one among them will bring about the coagulation of a gold sol quickest and in the least of concentration ? NaCl , MgSO_(4) , Al_(2)(SO_(4))_(3) , K_(4)[Fe(CN)_(6)] .

STATEMENT-1: Molar conductivity increases with decrease in concentration for weak electrolytes. STATEMENT-2: No. of ions increases and no. of ions per unit volume decreases due to dilution.

MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
  1. Which of the following statements is incorrect regarding physisorption...

    Text Solution

    |

  2. For a linear plot of log (x/m) versus log P in a Freundlich adsorption...

    Text Solution

    |

  3. The coagulating power of electrolytes having ions Na^+, Al^(3+) and Ba...

    Text Solution

    |

  4. 3g of activated charcoal was added to 50 mL of acetic acid solution (0...

    Text Solution

    |

  5. For a linear plot of log (x/m) versus log P in a Freundlich adsorption...

    Text Solution

    |

  6. On adding one mL of solution of 10% NaCl to 100 mL of gold sol in the ...

    Text Solution

    |

  7. When an excess and a very dilute aqueous solution of KI is added to a ...

    Text Solution

    |

  8. Which one of the following impurities present in colloidal solution ca...

    Text Solution

    |

  9. The ion that is more effective for coagulatin of As2S3 sol is

    Text Solution

    |

  10. The dispersed phase and dispersion medium in soap lather are respectiv...

    Text Solution

    |

  11. Which of the following relation is/ are correct for Langmuir adsorptio...

    Text Solution

    |

  12. The best coagulant for the precipitation of Fe(OH)3 sol is

    Text Solution

    |

  13. Which is correct about physical adsorption ?

    Text Solution

    |

  14. During the adsorption of a gas on the surface of a solid which of the ...

    Text Solution

    |

  15. Negatively charged colloidal solution of clay in water will need for p...

    Text Solution

    |

  16. Identify the positively charged sol.

    Text Solution

    |

  17. The stability of a lyophobic colloid is due to

    Text Solution

    |

  18. The amount of electrolytes required to coagulate a given amount of AgI...

    Text Solution

    |

  19. Gold sol can be prepared by

    Text Solution

    |

  20. For Freundlich isotherm, a graph of log x/m is plotted against log P. ...

    Text Solution

    |