Which ions can be separated using concentrate | vedclass

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(C) Concentrated $NaOH$ is used to separate metal ions based on the amphoteric nature of their hydroxides. $Fe^{3+}$ forms a brown precipitate of $Fe(

Vedclass · Accepted Answer

$Cr^{3+}$ and $Fe^{3+}$

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(C) Concentrated $NaOH$ is used to separate metal ions based on the amphoteric nature of their hydroxides. $Fe^{3+}$ forms a brown precipitate of $Fe(OH)_3$ which is insoluble in excess $NaOH$. $Cr^{3+}$ forms $Cr(OH)_3$ which is amphoteric and dissolves in excess $NaOH$ to form a soluble complex,$[Cr(OH)_4]^-$. Therefore,$Cr^{3+}$ and $Fe^{3+}$ can be separated using concentrated $NaOH$.

Which ions can be separated using concentrated $NaOH$?

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