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21 June, 17:36

What is a simple chemical test that will distinguish calcite from non-carbonate minerals?

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  1. 21 June, 18:35
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    Calcite with molecular formula CaCO_{3} is a carbonate minerals. It can be distinguish from non-carbonate minerals by reaction with HCl. The reaction of carbonate mineral, calcite with HCl produces effervescence due to the release of CO_{2} gas. This CO_{2} gas is produced due to the presence of carbonate in the calcite. The balanced chemical reaction is as follows:

    CaCO_{3}+2HCl/rightarrow CaCl_{2}+H_{2}O+CO_{2}

    Due to the absence of carbonate in non-carbonate minerals, the reaction with HCl does not form effervescence.
  2. 21 June, 21:18
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    To distinguish calcite from non-carbonate minerals, HCl test can be used because when a drop of HCl makes to fall on calcite, it makes it fizz but no such reaction is given by non-carbonate minerals. So, Dropping some drops of HCl on both, calcite and non-carbonate minerals, can distinguish both. As when a drop of HCl makes to fall on calcite, it makes it fizz but no such reaction is given by non-carbonate minerals.
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