JEE Mains · Chemistry · STD 11 - 6.2. Equilibrium - II (icon Equilibrium)
Which of the following happens when \(\mathrm{NH}_4 \mathrm{OH}\) is added gradually to the solution containing 1 M \(\mathrm{A}^{2+}\) and \(1 \mathrm{MB}^{3+}\) ions?
Given : \(\mathrm{K}_{\mathrm{sp}}\left[\mathrm{A}(\mathrm{OH})_2\right]=9 \times 10^{-10}\) and \(\mathrm{K}_{\mathrm{sp}}\left[\mathrm{B}(\mathrm{OH})_3\right]=27 \times 10^{-18}\) at 298 K .
- A Both \(\mathrm{A}(\mathrm{OH})_2\) and \(\mathrm{B}(\mathrm{OH})_3\) do not show precipitation with \(\mathrm{NH}_4 \mathrm{OH}\)
- B \(\mathrm{A}(\mathrm{OH})_2\) will precipitate before \(\mathrm{B}(\mathrm{OH})_3\)
- C \(\mathrm{B}(\mathrm{OH})_3\) will precipitate before \(\mathrm{A}(\mathrm{OH})_2\)
- D \(\mathrm{A}(\mathrm{OH})_2\) and \(\mathrm{B}(\mathrm{OH})_3\) will precipitate together
Answer & Solution
Correct Answer
(C) \(\mathrm{B}(\mathrm{OH})_3\) will precipitate before \(\mathrm{A}(\mathrm{OH})_2\)
Step-by-step Solution
Detailed explanation
Condition for precipitation \(\mathrm{Q}_{\text {ip }}>\mathrm{K}_{\text {sp }}\) For \(\left[\mathrm{A}(\mathrm{OH})_2\right]\)…
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