Nickel Hydroxide Precipitation

NiCl₂ + 2NaOH → Ni(OH)₂↓ + 2NaCl

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Sodium Hydroxide NaOH	2	(aq)
Sản phẩm	Sodium Chloride NaCl	2	(aq)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

Nickel hydroxide is a critical battery material for NiCd and NiMH batteries, and is also used in nickel plating and as a catalyst precursor.

Tính chất

Loại: Precipitation
Thuận nghịch: Không
Năng lượng: Tỏa nhiệt
ΔH: -55,0 kJ/mol

Phản ứng liên quan

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.