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A mixture of Al(OH)3 and Fe(OH)3 can be the separated by: A. HCl B. NH4OH C. NaOH D. HNO3

A mixture of Al(OH)3 and Fe(OH)3 can be the separated by:
A. HCl
B. NH4OH
C. NaOH
D. HNO3

Grade:12th pass

1 Answers

Vikas TU
14149 Points
one year ago
Dear student 
I think the ans should be A . 
Al(OH)3 is amphoteric in nature, and so it dissolves in NaOH solution forming sodium aluminate. The unreacted Fe(OH)3 can be removed by filtration.
The filtrate containing sodium aluminate is neutralised with HCl, and then treated with aqueous ammonia (NH4OH) when Al(OH)3 will be again precipitated.
So, A would be the coice .

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