Zinc Hydroxide Precipitation

ZnSO4 + 2NaOH → Zn(OH)2↓ + Na2SO4

अवलोकन

Zinc sulfate reacts with sodium hydroxide to form a white gelatinous precipitate of zinc hydroxide (Ksp = 3.0 × 10⁻¹⁷). Zn(OH)₂ is amphoteric, dissolving in excess NaOH to form the zincate ion [Zn(OH)₄]²⁻. This amphoteric behavior is a diagnostic test for zinc in qualitative analysis.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Zinc Sulfate ZnSO₄ 1 (aq)
अभिकारक Sodium Hydroxide NaOH 2 (aq)
उत्पाद Sodium Sulfate Na₂SO₄ 1 (aq)

रोजमर्रा का उदाहरण

Calamine lotion contains zinc compounds that form protective precipitates on skin, soothing itching from insect bites and rashes.

औद्योगिक महत्व

Zinc hydroxide precipitation is used in zinc recovery from wastewater, in calamine lotion production, and as a precursor to zinc oxide.

गुण

प्रकार
Precipitation
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माक्षेपी
ΔH
-38.0 kJ/mol

संबंधित अभिक्रियाएँ

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Fluoride Precipitation (Fluorite) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Lead Chloride Precipitation Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Zinc Hydroxide Precipitation?
The balanced equation is: ZnSO₄ + 2NaOH → Zn(OH)₂↓ + Na₂SO₄.
What type of reaction is Zinc Hydroxide Precipitation?
Zinc Hydroxide Precipitation is a precipitation reaction.
Is Zinc Hydroxide Precipitation exothermic or endothermic?
Zinc Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -38.0 kJ/mol.