The reagents NH_4Cl and aqueous NH_3 will pre | vedclass

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(B) In the qualitative analysis of basic radicals,$NH_4Cl$ and $NH_4OH$ (aqueous $NH_3$) are used as group reagents for Group-$III$ cations.$NH_4Cl$ s

Vedclass · Accepted Answer

$Al^{3+}$

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(B) In the qualitative analysis of basic radicals,$NH_4Cl$ and $NH_4OH$ (aqueous $NH_3$) are used as group reagents for Group-$III$ cations.$NH_4Cl$ suppresses the dissociation of $NH_4OH$ due to the common ion effect,thereby reducing the concentration of $OH^-$ ions.This low concentration of $OH^-$ is sufficient to exceed the solubility product $(K_{sp})$ of $Al(OH)_3$,$Fe(OH)_3$,and $Cr(OH)_3$,causing them to precipitate.Therefore,$Al^{3+}$ is precipitated by these reagents.

The reagents $NH_4Cl$ and aqueous $NH_3$ will precipitate which of the following ions?

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