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氢氧化银相关研究一（制取）

zx-973962022-09-18 IP:未同步

氢氧化银（silver hydroxide）是一种无机化合物，化学式为AgOH，具有两性，是一种白色固体，常温下极不稳定，易分解为褐色微溶于水的氧化银。分子量：124.876。因为氢氧化银常温下易分解，所以制取氢氧化银有一定的难度。

笔者是一名初中生，在初中阶段，氢氧化银是不存在的。但事实真的如此吗?答案是否定的。氢氧化银是不稳定的，在初中阶段的实验中会直接分解成氧化银。但是氢氧化银仅仅是不稳定，在低温条件下可以保存。那么制取也就变的简单了。我们都知道，氢氧化钠与硝酸银反应会生成氢氧化银和硝酸钠（见下方化学式）。那么只要试图将氢氧化钠溶液降温至-40摄氏度至-50摄氏度即可保证氢氧化银生成后不立刻分解。

外链图片已失效，请作者重新上传

具体方案：使用干冰将氢氧化钠酒精溶液降温，随后滴入硝酸银溶液，即可生成氢氧化银。随后将该溶液放入低温处理过的过滤装置中过滤出氢氧化银固体。再次使用干冰将容器降温，将氢氧化银固体装入容器中，封口，放入干冰桶中长久保存。如果该方案可行，那么后续对氢氧化银的研究将会变得更简单，但是尽管将生成物放入干冰桶中保存，但由于氢氧化银太不稳定，所以氢氧化银还有可能直接分解。

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