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प्रश्न
What do you observe when caustic soda solution is added to the following solution, first a little and then in excess:
FeCl3
Write a balanced equation for this reaction.
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उत्तर
\[\ce{\underset{\text{yellow}}{FeCl3} + 3NaOH -> \underset{\text{reddish brown, ppt}}{Fe(OH)3↓} + \underset{\text{colourless in solution}}{3NaCl}}\]
In excess of alkali , the reddish brown ppt. of Fe(OH)3 remains insoluble.
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