In the wet tests for detection of various cations by precipitation, $\mathrm{Ba}^{2+}$ cations are detected by obtaining precipitate of

(C) $\mathrm{Ba}(\mathrm{OAc})_{2}$

JEE Main · 2023 · 13 Apr 2023 · Shift 2 · Practical and Analytical Chemistry

In the wet tests for detection of various cations by precipitation,

Ba^{2 +}

cations are detected by obtaining precipitate of

(A)Ba(ox) : Barium oxalate
(B) $BaCO_{3}$ ✓ Correct
(C) $Ba (OAc)_{2}$
(D) $BaSO_{4}$

Answer: (B)

Solution

In qualitative inorganic analysis,

Ba^{2 +}

belongs to the 5th group of cations. The group reagent is

(NH_{4})_{2} CO_{3}

(ammonium carbonate). When

Ba^{2 +}

reacts with this reagent, it forms a white precipitate of barium carbonate:

Ba^{2 +} + (NH_{4})_{2} CO_{3} \to BaCO_{3} ↓ + 2 NH_{4}^{+}

This is the standard wet test for detecting

Ba^{2 +}

ions.

JEE Main · 2023 · 13 Apr 2023 · Shift 2 · Single correct option

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