Nickel Hydroxide Precipitation

NiCl2 + 2NaOH → Ni(OH)2↓ + 2NaCl

개요

Nickel chloride reacts with sodium hydroxide to form a green precipitate of nickel(II) hydroxide (Ksp = 5.5 × 10⁻¹⁶). The apple-green precipitate does not dissolve in excess NaOH (not amphoteric) but dissolves in ammonia to form the deep blue hexaammine nickel(II) complex.

참여 물질

역할 물질 계수 상태
반응물 Sodium Hydroxide NaOH 2 (aq)
생성물 Sodium Chloride NaCl 2 (aq)

일상 속 예시

Nickel hydroxide is the active material in rechargeable nickel-metal hydride (NiMH) batteries used in hybrid cars and consumer electronics.

산업적 중요성

니켈-수소(Ni-MH) 전지 및 니켈-카드뮴(Ni-Cd) 전지의 양극 활물질 전구체입니다. 니켈 이온이 포함된 산업 폐수의 침전 처리에도 활용됩니다.

성질

유형
Precipitation
가역 반응
아니오
에너지
발열
ΔH
-55.0 kJ/mol

관련 반응

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 Nickel Hydroxide Precipitation?
The balanced equation is: NiCl₂ + 2NaOH → Ni(OH)₂↓ + 2NaCl.
What type of reaction is Nickel Hydroxide Precipitation?
Nickel Hydroxide Precipitation is a precipitation reaction.
Is Nickel Hydroxide Precipitation exothermic or endothermic?
Nickel Hydroxide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -55.0 kJ/mol.