KCET · Chemistry · Surface Chemistry
Which of the following electrolytes will have maximum coagulating value for \( \mathrm{Agl} / \mathrm{Ag}^{+} \mathrm{sol} \) ?
- A \( \mathrm{Na}_{2} \mathrm{~S} \)
- B \( \mathrm{Na}_{3} \mathrm{PO}_{4} \)
- C \( \mathrm{Na}_{2} \mathrm{SO}_{4} \)
- D \( \mathrm{NaCl} \)
Answer & Solution
Correct Answer
(B) \( \mathrm{Na}_{3} \mathrm{PO}_{4} \)
Step-by-step Solution
Detailed explanation
According to Hardy-Schulze Rule,
The greater the valence, the greater is its power to cause coagulation. \( \mathrm{So}_{4} \mathrm{PO}_{4}{ }^{3-}>\mathrm{SO}_{4}{ }^{2-}>\mathrm{S}^{2-}>\mathrm{Cl}^{-} \)
The greater the valence, the greater is its power to cause coagulation. \( \mathrm{So}_{4} \mathrm{PO}_{4}{ }^{3-}>\mathrm{SO}_{4}{ }^{2-}>\mathrm{S}^{2-}>\mathrm{Cl}^{-} \)
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