<p><b>碘酸銅</b>是銅的碘酸鹽，化學式為Cu(IO<sub>3</sub>)<sub>2</sub>，目前僅已知二價的化合物。
</p>


<h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<p>向硝酸銅溶液中加入碘酸，得到一水合物晶體：
</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {Cu^2+ + 2HIO3 + H2O -&gt; Cu(IO3)2 . H2O + 2H+}}}">
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  </semantics></math></span></span></dd></dl><h2><span id=".E6.80.A7.E8.B4.A8"></span><span id="性质">性質</span></h2>
<p>碘酸銅一水合物（Cu(IO<sub>3</sub>)<sub>2</sub>·H<sub>2</sub>O）在240°C發生脫水，生成無水物。無水物繼續加熱至470°C，不經熔化而分解，生成氧化銅。可溶於稀硫酸、稀硝酸，不溶於水和熱乙醇。在氨水中形成配位化合物而溶解。
</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {Cu(IO3)2 + 4NH3 -&gt; [Cu(NH3)4]^2+ + 2IO3^-}}}">
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    <annotation encoding="application/x-tex">{\displaystyle {\ce {Cu(IO3)2 + 4NH3 -&gt; [Cu(NH3)4]^2+ + 2IO3^-}}}</annotation>
  </semantics></math></span></span></dd></dl><p>難溶於水，在水中解離如下：。
</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {Cu(IO3)2 . H2O &lt;=&gt; Cu^2+ (aq) + 2IO3^- (aq) + H2O}}}">
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  </semantics></math></span></span></dd></dl><h2><span id=".E5.8F.82.E8.80.83.E6.96.87.E7.8C.AE"></span><span id="参考文献">參考文獻</span></h2>

<h2><span id=".E6.8B.93.E5.B1.95.E9.98.85.E8.AF.BB"></span><span id="拓展阅读">拓展閱讀</span></h2>
<p><cite class="citation book">松岡敬一郎. ヨウ素綜説（第二版）. 霞ヶ関出版. 1992. <span title="國際標準書號">ISBN</span> 9784760301355.</cite><span title="ctx_ver=Z39.88-2004&amp;rfr_id=info%3Asid%2Fzh.wikipedia.org%3A%E7%A2%98%E9%85%B8%E9%93%9C&amp;rft.au=%E6%9D%BE%E5%B2%A1%E6%95%AC%E4%B8%80%E9%83%8E&amp;rft.btitle=%E3%83%A8%E3%82%A6%E7%B4%A0%E7%B6%9C%E8%AA%AC%EF%BC%88%E7%AC%AC%E4%BA%8C%E7%89%88%EF%BC%89&amp;rft.date=1992&amp;rft.genre=book&amp;rft.isbn=9784760301355&amp;rft.pub=%E9%9C%9E%E3%83%B6%E9%96%A2%E5%87%BA%E7%89%88&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook"><span> </span></span>
</p>
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**碘酸銅**是銅的碘酸鹽，化學式為 Cu (IO3)2，目前僅已知二價的化合物。

## 製備

向硝酸銅溶液中加入碘酸，得到一水合物晶體：

　
: ${\ce {Cu^2+ + 2HIO3 + H2O -> Cu(IO3)2 . H2O + 2H+}}$

## 性質

碘酸銅一水合物（Cu (IO3)2·H2O）在 240°C 發生脫水，生成無水物。無水物繼續加熱至 470°C，不經熔化而分解，生成氧化銅。可溶於稀硫酸、稀硝酸，不溶於水和熱乙醇。在氨水中形成配位化合物而溶解。

　
: ${\ce {Cu(IO3)2 + 4NH3 -> [Cu(NH3)4]^2+ + 2IO3^-}}$

難溶於水，在水中解離如下：。

　
: ${\ce {Cu(IO3)2 . H2O <=> Cu^2+ (aq) + 2IO3^- (aq) + H2O}}$ , $K{\rm {{sp}=1.4\times 10^{-7}}}$

## 參考文獻

## 拓展閱讀

松岡敬一郎。ヨウ素綜説（第二版）. 霞ヶ関出版. 1992. ISBN 9784760301355.
13454-89-2