2.2 KiB
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加熱で酸化亜鉛が作れる
- 亜鉛を塩酸（ハイターとか）で溶かして塩化亜鉛（水溶性）
- Zn+2HCl → ZnCl2+H2
- 炭酸ナトリウム（重曹）と合わせて炭酸亜鉛を作る（不溶性）
- ZnCl2+Na2Co3 → 2NaCl2 + ZnCo3
- 塩酸の残りはH2になって出ていく
- フィルターして炭酸亜鉛を取り出し、純水で洗い、乾かす
- 理想的には塩化ナトリウム溶液が残るはず
- 酢酸溶液（酢でもいい）に溶かす
- 日向で放置したら残った酢酸溶液は蒸発していく
- あんまり強く加熱すると先にZnOが生成されてしまう
Zinc acetate can be prepared by adding zinc metal or zinc oxide to acetic acid.
2 CH3COOH + Zn → Zn(CH3COO)2 + H2
2 CH3COOH + ZnO → Zn(CH3COO)2 + H2O
Vinegar can also be used as cheap source acetic acid. After all the zinc has dissolved, the solution is concentrated and cooled to crystallize solid zinc acetate dihydrate. If vinegar was used, organic residue from the vinegar will be trapped in the zinc acetate crystals. To remove the impurities, crush the resulting crystals and wash them thoroughly with an organic solvent. Multiple recrystallizations might be required to remove all the impurities.
If anhydrous zinc acetate is desired, you can dry the zinc acetate dihydrate by refluxing it with toluene, and using a Dean-Stark apparatus to separate the water.
究極的にはZnをお酢に突っ込んで放置すれば良いのか