Answer:
Calcium carbonate and citric acid.
Explanation:
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In this case, considering the text, we can notice that calcium carbonate combines with citric acid to produce the calcium citrate water and carbon dioxide as shown on the following equation:
[tex]3CaCO_3+2C_6H_8O_7\rightarrow Ca_3C_{12}H_{10}O_{14}+CO_2+H_2O[/tex]
Whereas the reactants, at the left side, are identified as calcium carbonate and citric acid.
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