In the wet tests for detection of various cations by precipitation, Ba2+ cations are detected by obtaining precipitate of
Select the correct option:
A
Ba(ox): Barium oxalate
B
$\mathrm{BaCO}_3$
C
$\mathrm{Ba}(\mathrm{OAc})_2$
D
$\mathrm{BaSO}_4$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
Sol. In wet testing, $\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3$ is used as group reagent for $5^{\text {th }}$ group cations $\left(\mathrm{Ba}^{2+}, \mathrm{Ca}^{2+}, \mathrm{Sr}^{2+}\right)$
$$
\mathrm{Ba}^{+2}+\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3 \rightarrow \underset{\text { (white precipitate) }}{\mathrm{BaCO}_3 \downarrow}+\mathrm{NH}_4^{\ominus}
$$
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