62问答网 > 铁为阳极，石墨为阴极，氢氧化钠为电解质溶液

铁为阳极，石墨为阴极，氢氧化钠为电解质溶液

2025-04-07 12:56:59
推荐回答（1个）
回答1：

在电源的作用下，阳极铁单质先发生氧化反应，生成亚铁离子，进入溶液中，并与氢氧化钠发应生成白色的氢氧化亚铁沉淀。由于Fe(II)不稳定，易被水中的溶解氧所氧化，颜色由白色变为灰绿色，并逐渐加深至生成棕红色的氢氧化铁沉淀。而阴极则发生还原反应，水中微量的H+得到电子，生成H2。

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