Which of the following ion has greater coagulating power for negatively charged sol?

Which of the following ion has greater coagulating power for negatively charged sol?
  1. $\mathrm{Fe}(\mathrm{CN})_6^{4-}$
  2. $\mathrm{PO}_4^{3-}$
  3. $\mathrm{Ba}^{2+}$
  4. $\mathrm{Al}^{3+}$

Solution

In the coagulation of negative sol, greater the positive charge of the flocculating ion added, greater is its power to cause precipitation.

Asked in: MHT CET 2023 (14 May Shift 1)

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