Zinc Hydroxide as Amphoteric Acid with NaOH
Zn(OH)2 + 2NaOH → Na2[Zn(OH)4]
概要
Zinc hydroxide dissolves in excess sodium hydroxide to form the soluble tetrahydroxozincate complex. This demonstrates zinc hydroxide's acidic character. The initial white precipitate formed by adding NaOH to Zn²⁺ dissolves upon addition of excess base, a key observation in qualitative analysis.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Sodium Hydroxide NaOH | 2 | (aq) |
日常の例
In qualitative analysis labs, students observe the zinc precipitate dissolving in excess NaOH as proof of zinc's amphoteric nature.
産業上の重要性
亜鉛酸塩溶液はアルカリ亜鉛めっき浴、亜鉛めっきプロセス、酸化亜鉛の製造に使用される。
特性
- タイプ
- Acid-Base
- 可逆的
- はい
- エネルギー
- 発熱性
- ΔH
- -15.0 kJ/mol
関連する反応
Acetic Acid Dissociation in Water
Ammonia and Hydrochloric Acid
Ascorbic Acid and Sodium Hydroxide
Barium Hydroxide and Ammonium Thiocyanate (Endothermic)
Carbonic Acid and Sodium Hydroxide
Aluminum Hydroxide as Amphoteric Acid with NaOH
Aluminum Chloride and Chloride Ion (Lewis Acid-Base)
Hydrochloric Acid and Sodium Hydroxide Neutralization
Nitric Acid and Potassium Hydroxide Neutralization
Hydrochloric Acid and Barium Hydroxide
Frequently Asked Questions
What is the equation for Zinc Hydroxide as Amphoteric Acid with NaOH?
The balanced equation is: Zn(OH)₂ + 2NaOH → Na₂[Zn(OH)₄].
What type of reaction is Zinc Hydroxide as Amphoteric Acid with NaOH?
Zinc Hydroxide as Amphoteric Acid with NaOH is a acid-base reaction. It is reversible under certain conditions.
Is Zinc Hydroxide as Amphoteric Acid with NaOH exothermic or endothermic?
Zinc Hydroxide as Amphoteric Acid with NaOH is exothermic (releases energy). The enthalpy change (ΔH) is -15.0 kJ/mol.