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能用氢氧化钠来除氧化铁中的氧化铝杂质吗

2025-04-06 08:56:53

推荐回答（1个）

回答1：

可以，因为Al2O3为两性氧化物，能够与氢氧化钠反应，生成溶于水的偏铝酸钠；而Fe2O3是碱性氧化物，只能和酸性物质反应。
方法：把氧化铝杂质的氧化铁放入NaOH溶液中，待充分反应后过滤烘干即可除去氧化铝。
Al2O3+2NaOH=2NaAlO2+H2O

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