Is CuSO4 a base or acid?

CuSO4 is neither a base nor an acid in the traditional sense; it's a salt that produces slightly acidic solutions when dissolved in water.

Copper sulfate is classified as a salt formed from:

• A strong acid (sulfuric acid, H₂SO₄)
• A weak base (copper hydroxide, Cu(OH)₂)

When dissolved, CuSO4 creates a weakly acidic solution (pH around 3-4) because:

• Copper ions hydrolyze: Cu²⁺ + H₂O → Cu(OH)⁺ + H⁺
• This releases hydrogen ions, lowering pH
• The sulfate ion doesn't significantly affect pH

Important Notes:

• CuSO4 is a salt, not an acid or base
• Its aqueous solution is slightly acidic
• pH typically ranges from 3 to 4
• The acidity comes from copper ion hydrolysis