天气预报 > 其他 > 粗盐提纯后还有那些可溶性杂质
粗盐提纯后还有那些可溶性杂质
更新时间: 2020-10-02 00:00:00  

粗盐中含有镁离子,钙离子,硫酸根离子。

去除可溶性杂质:溶解加入过量氯化钡溶液,去除硫酸根离子,加入过量氢氧化钠溶液,去除镁离子,加入过量碳酸钠溶液,去除钙离子及氯化钡中的钡离子,过滤 ,向滤液中加入适量盐酸,除去过量氢氧化钠和碳酸钠。

关键词: 提纯 还有 那些 可溶性 杂质

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