Question

Assertion (A): When ferric chloride is added to NaOH a negatively

charged sol is obtained.

Reason (R): The charge is due to adsorption of OH− ions. ​

Answer 1

Answer:

Thus, it is believed that the charge on the colloidal particles is due to the preferential adsorption of either positive or negative ions on their surface. A negatively charged sol of hydrated ferric oxide is formed when ferric chloride is added to NaOH solution as follows: FeCl3 + 2NaOH → Fe(OH)3 + 3NaCl.

Explanation:

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