Which of the following reagents would you use | vedclass

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(C) To separate $SO_4^{2-}$ ions from a mixture containing $SO_4^{2-}$ and $Cl^-$ ions,we need a reagent that forms an insoluble precipitate with sulf

Vedclass · Accepted Answer

$Ba(OH)_2$

Vedclass · Answer

(C) To separate $SO_4^{2-}$ ions from a mixture containing $SO_4^{2-}$ and $Cl^-$ ions,we need a reagent that forms an insoluble precipitate with sulfate ions but remains soluble with chloride ions. $Ba^{2+}$ ions react with $SO_4^{2-}$ to form $BaSO_4$ (barium sulfate),which is a white precipitate. $BaCl_2$ or $Ba(OH)_2$ are commonly used sources of $Ba^{2+}$. $Ba^{2+} + SO_4^{2-} \rightarrow BaSO_4(s)$. $Cl^-$ ions remain in the solution as they do not form a precipitate with $Ba^{2+}$. Therefore,$Ba(OH)_2$ is the correct reagent.

Which of the following reagents would you use to separate $SO_4^{2-}$ ions from a solution containing a mixture of $SO_4^{2-}$ and $Cl^-$ ions?

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