What reagent could not be used to separate br - from co 3 2- when added to an aqueous solution containing both?

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22-08-2022
Chemistry

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What reagent could not be used to separate br - from co 3 2- when added to an aqueous solution containing both?

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smecloudbird18 smecloudbird18 · Answer 1 · 2022-08-30T05:42:43+02:00

None of these reagent could not be used to separate [tex]Br ^{-}[/tex] from [tex]CO_{3} ^{-2}[/tex]when added to an aqueous solution containing both .

So , correct option is B .

[tex]AgNO_{3} (aq)[/tex] could not used to separate [tex]Br ^{-}[/tex] from [tex]CO_{3} ^{-2}[/tex] . Because, both the ions form precipitate with silver nitrate. Hence it is not possible to separate one from other.

[tex]AgNO_{3} (aq) + Br^- (aq)[/tex] → [tex]AgBr (s) + NO_{3} ^- (aq)[/tex]

[tex]2 AgNO_{3} (aq) + CO_{3} ^2- (aq)[/tex] → [tex]Ag_{2} CO_{3} (s) + 2 NO_{3} ^- (aq)[/tex]

In remaining reagent each only carbonate is precipitated leaving bromide ions in the solution state.

Missing part in the question :

The options are missing

[tex]Ca(NO_{3} )_{2} (aq)[/tex]

None of these could be used to separate [tex]Br ^{-}[/tex] from [tex]CO_{3} ^{-2}[/tex] .
[tex]Cu(NO_{3} )_{2} (aq)[/tex]

[tex]Fe(NO_{3} )_{2} (aq)[/tex]
[tex]AgNO_{3} (aq)[/tex]

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