Question:
The electrolyte having maximum flocculation value for $AgI/Ag^+$ sol is
The electrolyte having maximum flocculation value for $AgI/Ag^+$ sol is
Updated On: Apr 13, 2024
- $NaCl$
- $Na_2S$
- $Na_2SO_4$
- $Na_3PO_4$
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The Correct Option is A
Solution and Explanation
According to Hardy - Schulze rule
Flocculation value $(FV) \propto \frac{1}{\text { Coagulation power }}$
Coagulation value
Since, coagulating power is direct us related to the valencies of coagulating ion.
Thus,
$F V \propto \frac{1}{\text { valency of flocculating ion electrolyte }}$
Hence, greater the valency of coagulating ion, lower will be the flocculating value and vice versa.
As for the given positively charged sol, negative ion would be required for coagulation thus, for the given anions the coagulation power will be
$PO _{4}^{3-}< SO _{4}^{2-}= S ^{2-}< Cl ^{-}$ or flocculating but coagulating value would be in an order of :
$Cl ^{-}> S ^{2-}= SO _{4}^{2-}> PO _{4}^{3-}$
Hence, $NaCl$ will have the maximum flocculating value for the given positively charged sol.
Flocculation value $(FV) \propto \frac{1}{\text { Coagulation power }}$
Coagulation value
Since, coagulating power is direct us related to the valencies of coagulating ion.
Thus,
$F V \propto \frac{1}{\text { valency of flocculating ion electrolyte }}$
Hence, greater the valency of coagulating ion, lower will be the flocculating value and vice versa.
As for the given positively charged sol, negative ion would be required for coagulation thus, for the given anions the coagulation power will be
$PO _{4}^{3-}< SO _{4}^{2-}= S ^{2-}< Cl ^{-}$ or flocculating but coagulating value would be in an order of :
$Cl ^{-}> S ^{2-}= SO _{4}^{2-}> PO _{4}^{3-}$
Hence, $NaCl$ will have the maximum flocculating value for the given positively charged sol.
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Concepts Used:
Surface Chemistry
The study of the chemical phenomena that occur at the interface of two surfaces which can be solid-liquid, solid-gas, solid-vacuum, liquid-gas, etc.
Read Also: Surface Chemistry
Applications of surface chemistry are:
Adsorption:
The process of attraction and aggregation of the molecules of a substance on the surface of a solid is known as adsorption. For Example, N2 adsorbs on the surface of activated charcoal
Two types of adsorption are:-
- Chemisorption: It is also known as Chemical Adsorption.
- Physisorption: It is also known as Physical Adsorption.
Corrosion:
The process through which the refined metals convert themselves into more stable compounds is known as corrosion.
Crystallisation:
The type of technique used in order to purify the substances to separate Solids from liquids is known as crystallisation.
Heterogeneous Catalysis:
The process wherein a catalyst is used in order to increase the rate of a chemical reaction is known as catalysis. The catalyst does not undergo any transformation and can be recovered in a chemically unchanged state.
There are two types of catalysis:-
- When the catalyst involved and the reacting substances are same states of matter or in the same phase, it is known as Homogeneous Catalysis.
- When the catalyst involved and the reacting substances are in different states of matter or different phases, it is known as Heterogeneous Catalysis.