Nickel Hydroxide Precipitation

NiCl2 + 2NaOH → Ni(OH)2↓ + 2NaCl

概要

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.

参加者

役割 物質 係数 状態
反応物 Sodium Hydroxide NaOH 2 (aq)
生成物 Sodium Chloride NaCl 2 (aq)

日常の例

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

産業上の重要性

水酸化ニッケルはNiCd・NiMH電池の正極活物質として、またニッケルめっき・触媒・新型電池正極材（ニッケルリッチLi-Ni-Mn-Co酸化物）の前駆体として重要な材料である。

特性

タイプ
Precipitation
可逆的
いいえ
エネルギー
発熱性
ΔH
-55.0 kJ/mol

関連する反応

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.