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Question
What do you observe when ammonium hydroxide is added to the aqueous solution of FeSO4? Write a balanced equation for this.
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Solution
Dirty green ppt. of ferrous hydroxide is formed, which is insoluble in excess of NH4OH.
\[\ce{FeSO4 + 2NH4OH -> [NH4]2SO4 + Fe(OH)2 ↓}\]
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