Nickel Hydroxide Precipitation

NiCl2 + 2NaOH → Ni(OH)2↓ + 2NaCl

概述

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.

参与者

角色 物质 系数 状态
反应物 Sodium Hydroxide NaOH 2 (aq)
产物 Sodium Chloride NaCl 2 (aq)

日常示例

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

工业重要性

氢氧化镍是NiCd和NiMH电池的正极活性材料，也是镍镀层的重要中间体和催化剂前体。丰田普锐斯等混合动力汽车大量采用NiMH电池。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-55.0 kJ/mol

相关反应

Aluminum Hydroxide Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Magnesium Hydroxide Precipitation Copper Sulfide Precipitation Cobalt(II) Hydroxide 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.