KCET · Chemistry · General Principles and Processes of Isolation of Metals
The complex formed when \( \mathrm{Al}_{2} \mathrm{O}_{3} \) is leached from Bauxite using concentrated \( \mathrm{NaOH} \) solution
is,
- A \( N a\left[A l(O H)_{4}\right] \)
- B \( \mathrm{NaAl}_{2} \mathrm{O}_{4} \)
- C \( \mathrm{Na}_{2}\left[\mathrm{Al}(\mathrm{OH})_{3}\right] \)
- D \( \mathrm{Na}_{2} \mathrm{AlO}_{2} \)
Answer & Solution
Correct Answer
(A) \( N a\left[A l(O H)_{4}\right] \)
Step-by-step Solution
Detailed explanation
When \( \mathrm{Al}_{2} \mathrm{O}_{3} \) is leached from bauxite using concentrated \( \mathrm{NaOH} \) solution, the complex formed is \( \mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_{4}\right] \)
The reaction involved in leaching from bauxite ore is,
\( \mathrm{Al}_{2} \mathrm{O}_{3} \cdot 2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{NaOH}+3 \mathrm{H}_{2} \mathrm{O}-{ }^{473-523 k}->\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_{4}\right] \)
The reaction involved in leaching from bauxite ore is,
\( \mathrm{Al}_{2} \mathrm{O}_{3} \cdot 2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{NaOH}+3 \mathrm{H}_{2} \mathrm{O}-{ }^{473-523 k}->\mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_{4}\right] \)
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