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钙离子能和氢氧根共存吗

2025-04-06 06:08:29

推荐回答（2个）

回答1：

氢氧根离子和铝离子不能共存
少量氢氧根会发生反应：
al3+
+
3oh-
=al(oh)3↓
大量氢氧根会发生反应：
al3+
+
4oh-
=alo2-
+
h2o

回答2：

Ca(OH)2虽然是微溶于水，但同一个溶液中两者不能共存。澄清石灰水是氢氧化钙的稀溶液。石灰乳就是氢氧化钙的悬浊液了。写离子方程式时澄清石灰水写成Ca2+和OH-，后者不能拆开。

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