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:

  1. In excess of NaOH,Al(OH)3 dissolves forming NaAlO2 while Fe(OH)3 remains insoluble.


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