수산화아연 침전

ZnSO4 + 2NaOH → Zn(OH)2↓ + Na2SO4

개요

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.

참여 물질

역할 물질 계수 상태
반응물 황산아연 ZnSO₄ 1 (aq)
반응물 수산화나트륨 NaOH 2 (aq)
생성물 황산나트륨 Na₂SO₄ 1 (aq)

일상 속 예시

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

산업적 중요성

수산화아연 침전은 폐수로부터 아연 회수, 칼라민 로션 생산, 산화아연 전구체로 사용됩니다.

자주 묻는 질문

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