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Copper carbonate (CuCO₃) reacts with hydrochloric acid (HCl) according to this equation:

[tex]\[ \text{CuCO}_3(s) + 2 \text{HCl}(aq) \rightarrow \text{CuCl}_2(aq) + \text{H}_2\text{O}(l) + \text{CO}_2(g) \][/tex]

Which statement correctly describes the substances in this reaction?

A. Exactly one product and two reactants are either liquid or dissolved in water.
B. Exactly one of the reactants is in a water-based solution, but none of the products are.
C. The reactants include both a liquid and a gas.
D. Exactly one reactant is a solid, and exactly one product is a gas.
E. The products include a solid, a liquid, and a gas.

Sagot :

GinnyAnswer
Let's analyze the equation and interpret the states of the substances involved in the reaction carefully:

[tex]\[ CuCO_3 (s) + 2 HCl (aq) \rightarrow CuCl_2 (aq) + H_2O (l) + CO_2 (g) \][/tex]

1. Reactants:
- [tex]\( CuCO_3 \)[/tex] is a solid (s).
- [tex]\( HCl \)[/tex] is in an aqueous solution (aq).

2. Products:
- [tex]\( CuCl_2 \)[/tex] is in an aqueous solution (aq).
- [tex]\( H_2O \)[/tex] is a liquid (l).
- [tex]\( CO_2 \)[/tex] is a gas (g).

Now let's evaluate the statements:

A. "Exactly one product and two reactants are either liquid or dissolved in water."
- The reactants: [tex]\( HCl \)[/tex] is aqueous. [tex]\( CuCO_3 \)[/tex] is a solid.
- The products: [tex]\( CuCl_2 \)[/tex] is aqueous. [tex]\( H_2O \)[/tex] is a liquid.
- There are two products that are liquid or dissolved in water ([tex]\( CuCl_2 \)[/tex]) and ([tex]\( H_2O \)[/tex]), not exactly one.

B. "Exactly one of the reactants is in a water-based solution, but none of the products are."
- This statement is incorrect because [tex]\( CuCl_2 \)[/tex] is in an aqueous solution, meaning one of the products is in a water-based solution.

C. "The reactants include both a liquid and a gas."
- Neither of the reactants [tex]\( CuCO_3 \)[/tex] (solid) and [tex]\( HCl \)[/tex] (aqueous) is a gas. Hence, this statement is incorrect.

D. "Exactly one reactant is a solid, and exactly one product is a gas."
- This statement is correct. [tex]\( CuCO_3 \)[/tex] is a solid reactant, and [tex]\( CO_2 \)[/tex] is a gaseous product.

E. "The products include a solid, a liquid, and a gas."
- This statement is incorrect because the products include an aqueous solution ([tex]\( CuCl_2 \)[/tex]), a liquid ([tex]\( H_2O \)[/tex]), and a gas ([tex]\( CO_2 \)[/tex]), but not a solid.

Therefore, the correct answer is:
D. Exactly one reactant is a solid, and exactly one product is a gas.
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