Which of the following will precipitate first when aqueous solution containing sulphate ions are added?

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Which of the following will precipitate first when aqueous solution containing sulphate ions are added?

Chemistrys Block ElementsBITSATBITSAT 2023 (Memory Based Paper 1)

Options:

A $\mathrm{Mg}^{2+}$
B $\mathrm{Ca}^{2+}$
C $\mathrm{Sr}^{2+}$
D $\mathrm{Ba}^{2+}$

Solution:

1632 Upvotes Verified Answer

The correct answer is: $\mathrm{Ba}^{2+}$

Down the group solubility of sulphate decreases. Thus, $\mathrm{Ba}^{2+}$ ions will precipitate out most easily.

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