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<p><b><i>Calcium carbonate has medical use as a <a href="page.php?w=calcium">calcium</a> supplement or as an <a href="page.php?w=antacid">antacid</a>, but excessive consumption can be hazardous and cause <a href="page.php?w=hypercalcemia">hypercalcemia</a> and digestive issues.</i></b></p>

<p><big>Chemistry</big></p>
<p>Calcium carbonate shares the typical properties of other <a href="page.php?w=carbonate">carbonate</a>s. Notably, it:<br/>
*reacts with <a href="page.php?w=acid">acid</a>s, releasing <a href="page.php?w=carbonic_acid">carbonic acid</a> which</p><p>
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