Qualitative Analysis - Result Question 66
####69. Give reason in one or two sentences for the following “The hydroxides of aluminium and iron are insoluble in water. However, $NaOH$ is used to separate one from other.
(1991, 2M)
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Solution:
- In excess of $NaOH, Al(OH) _3$ dissolves forming $NaAlO _2$ while $Fe(OH) _3$ remains insoluble.
