How does this generate acidic ions??

[td4azklz]

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FeCl3 + H2O

I really do know, somebody please help ?

 

[winkipink]

Hmm, Cl- is a spectator ion, so count those out of the the equilibrium formula:

Fe^3+ + H2O <=> Fe(OH)3 + H^+

the H+ at the end makes the solution acidic.

 

[doc3232]

This seems too hard.
I would tell you if I knew it, but I would just ignore it.