Nickel Hydroxide Precipitation

NiCl2 + 2NaOH → Ni(OH)2↓ + 2NaCl

ภาพรวม

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.

ผู้เข้าร่วม

บทบาท สาร สัมประสิทธิ์ สถานะ
สารตั้งต้น Sodium Hydroxide NaOH 2 (aq)
ผลิตภัณฑ์ Sodium Chloride NaCl 2 (aq)

ตัวอย่างในชีวิตประจำวัน

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

ความสำคัญทางอุตสาหกรรม

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

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.