Question

Cu(OH)₂ is soluble in excess of ______.

Options

• NaOH

• NH₄OH

• Both NaOH and NH₄OH

• None of these

Answer 1

Cu(OH)₂ is soluble in excess of NH₄OH.

Explanation:

Copper hydroxide is completely insoluble in excess sodium hydroxide (NaOH), but it dissolves in excess ammonium hydroxide (NH₄OH) to form a clear, deep inky-blue complex solution.