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Which statement best describes the equation CaCO3 + 2HCl → CaCl2 + CO2 + H2O? A. CaCO3 is a reactant; it is present before the reaction occurs. B. CaCl2 is a reactant; it is present before the reaction occurs. C. CO2 is a reactant because it is most likely a gas. D. H2O is a reactant because it is most likely a liquid.

Curtis Rhodes

in Chemistry

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Carlton Burgess on February 16, 2018

Statement A is correct.That we know nothing about the states from the equation so that it can't be C or D (in addition to that the state is not going to determine if it is a product or reactant).CaCl2 is a product because it is written in the right-hand side of the equation, so B is false.The CaCO3 is a reactant, as it is written in the left-hand side of the equation and is thus a reactant, by the statement of the correct answer.


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