Question

explain what is observed when an electrolyte is aded to hydrated ferric oxide solution​

Answer 1

When NaCl is added to ferric oxide sol, it dissociates to give Na+ and Cl-­ ions. Particles of ferric oxide sol are positively charged. Thus, they get coagulated in the presence of negatively charged Cl- ions.

Answer 2

Answer:

If an electrolyte is added to a hydrated ferric oxide sol, the colloidal particles get precipitated due to neutralization of charges.