Question

Correct order of flocculating value of electrolytes KCl, K2SO4 and K3[Fe(CN)6] for coagulation of positive Fe(OH)3 sol is

Options:
KCl > K2SO4 > K3[Fe(CN)6]
KCl > K3[Fe(CN)6] > K2SO4
K3[Fe(CN)6] > KCl > K2SO4
K3[Fe(CN)6] > K2SO4 > KCl

Answer 1

Answer:

KCl > K2SO4 > K3[Fe(CN)6]

Explanation:

Electrolyte of highest coagulating power has lowest flocculating value.

 Fe(OH)3 is a positively charged sol and for its coagulation, order of flocculating value of given electrolytes is KCl > K2SO4 > K3[Fe(CN)6]

Answer 2

The correct order of flocculating value of electrolytes KCl, K2SO4 and K3[Fe(CN)6] for coagulation of positive Fe(OH)3 sol Is KCl > K2SO4 > K3[Fe(CN)6].

• Coagulation value or flocculating value is the amount of electrolyte required to coagulate sol.
• Coagulation value is inversely proportional to coagulating power.
• The coagulation power is higher for higher oxidation states or higher charge species. it means the minimum amount of electrolyte required for coagulation has a maximum charge.
• KCl has -1, K2SO4 has -2 and K3[Fe(CN)6] has -3 on the anionic part.
• Fe(OH)3 is a positive sol and can be consulate by a negative sol.
• So, K3[Fe(CN)6] has the the the least value of coagulation.

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