<p><b>溴酸鈣</b>是鈣的溴酸鹽，化學式 <span>Ca(BrO<span><br>3</span>)<span><br>2</span></span>。
</p>


<h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<p>溴酸鈣可以由碳酸鈣和溴酸反應而成。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathrm {CaCO_{3}+2\ HBrO_{3}\longrightarrow Ca(BrO_{3})_{2}+H_{2}O+CO_{2}\uparrow } }">
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    <annotation encoding="application/x-tex">{\displaystyle \mathrm {CaCO_{3}+2\ HBrO_{3}\longrightarrow Ca(BrO_{3})_{2}+H_{2}O+CO_{2}\uparrow } }</annotation>
  </semantics></math></span></span></dd></dl><p>它也可以由溴酸和氫氧化鈣中和而成。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathrm {Ca(OH)_{2}+2\ HBrO_{3}\longrightarrow Ca(BrO_{3})_{2}+2\ H_{2}O} }">
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    <annotation encoding="application/x-tex">{\displaystyle \mathrm {Ca(OH)_{2}+2\ HBrO_{3}\longrightarrow Ca(BrO_{3})_{2}+2\ H_{2}O} }</annotation>
  </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>溴酸鈣一水合物是單斜晶系的，和溴酸鍶和溴酸鋇一樣。在 130 至150 °C 時，水合物脫水，形成無水溴酸鈣。在 270–300 °C 時，無水溴酸鈣會分解成溴化鈣，放出氧氣。</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathrm {Ca(BrO_{3})_{2}\longrightarrow CaBr_{2}+3\ O_{2}\uparrow } }">
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    <annotation encoding="application/x-tex">{\displaystyle \mathrm {Ca(BrO_{3})_{2}\longrightarrow CaBr_{2}+3\ O_{2}\uparrow } }</annotation>
  </semantics></math></span></span></dd></dl><h2><span id=".E7.94.A8.E5.A4.84"></span><span id="用处">用處</span></h2>
<p>在某些國家，溴酸鈣用作麵包的麵團和麵粉的添加劑，E編碼 <b>E924b</b>。</p>
<h2><span id=".E5.8F.82.E8.80.83.E8.B5.84.E6.96.99"></span><span id="参考资料">參考資料</span></h2>
**溴酸鈣**是鈣的溴酸鹽，化學式 Ca(BrO 
3) 
2。

## 製備

溴酸鈣可以由碳酸鈣和溴酸反應而成。

　
: $\mathrm {CaCO_{3}+2\ HBrO_{3}\longrightarrow Ca(BrO_{3})_{2}+H_{2}O+CO_{2}\uparrow } $

它也可以由溴酸和氫氧化鈣中和而成。

　
: $\mathrm {Ca(OH)_{2}+2\ HBrO_{3}\longrightarrow Ca(BrO_{3})_{2}+2\ H_{2}O} $

## 性質

溴酸鈣一水合物是單斜晶系的，和溴酸鍶和溴酸鋇一樣。在 130 至 150 °C 時，水合物脫水，形成無水溴酸鈣。在 270–300 °C 時，無水溴酸鈣會分解成溴化鈣，放出氧氣。

　
: $\mathrm {Ca(BrO_{3})_{2}\longrightarrow CaBr_{2}+3\ O_{2}\uparrow } $

## 用處

在某些國家，溴酸鈣用作麵包的麵團和麵粉的添加劑，E 編碼 **E924b**。

## 參考資料
10102-75-7