Copper(II) Hydroxide Precipitation

CuSO4 + 2NaOH → Cu(OH)2↓ + Na2SO4

ภาพรวม

Copper sulfate reacts with sodium hydroxide to form a pale blue gelatinous precipitate of copper(II) hydroxide (Ksp = 2.2 × 10⁻²⁰). The precipitate can be dehydrated by heating to produce black copper(II) oxide. This reaction is the basis of the Biuret test for proteins.

ผู้เข้าร่วม

บทบาท สาร สัมประสิทธิ์ สถานะ
สารตั้งต้น Copper(II) Sulfate CuSO₄ 1 (aq)
สารตั้งต้น Sodium Hydroxide NaOH 2 (aq)
ผลิตภัณฑ์ Sodium Sulfate Na₂SO₄ 1 (aq)

ตัวอย่างในชีวิตประจำวัน

The Biuret test for proteins uses Cu(OH)₂ formed from copper sulfate and NaOH; proteins turn the mixture violet due to copper-peptide bond complexation.

ความสำคัญทางอุตสาหกรรม

Copper hydroxide is used as a fungicide (Bordeaux mixture), in copper electroplating solutions, and as a precursor to copper oxide catalysts.

Frequently Asked Questions

What is the equation for Copper(II) Hydroxide Precipitation?
The balanced equation is: CuSO₄ + 2NaOH → Cu(OH)₂↓ + Na₂SO₄.
What type of reaction is Copper(II) Hydroxide Precipitation?
Copper(II) Hydroxide Precipitation is a precipitation reaction.
Is Copper(II) Hydroxide Precipitation exothermic or endothermic?
Copper(II) Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -59.0 kJ/mol.