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  4. Which of the following aqueous solution will have pH less than 7.0?

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Q. Which of the following aqueous solution will have pH less than 7.0?

NTA AbhyasNTA Abhyas 2020Equilibrium

Solution:

$\text{FeCl}_{\text{3}}$ is a salt of weak base, $\left(\text{Fe(OH)}\right)_{\text{3}}$ and strong acid, $\text{HCl}$ , so $\text{FeCl}_{\text{3}}$ solution is acidic in nature. In other words, $\text{Fe}^{\text{3+}}$ hydrolyze, but $\text{Cl}^{-}$ does not.

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