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13. In the chemical equation [tex][tex]$Zn + 2 HCl \rightarrow ZnCl_2 + H_2$[/tex][/tex], the reactants are:

A. zinc chlorate and water.
B. zinc and hydrogen carbonate.
C. zinc chloride and hydrogen.
D. zinc and hydrochloric acid.

Sagot :

GinnyAnswer
To identify the reactants in the given chemical equation [tex]\( \text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \)[/tex], let's analyze the components of the equation step-by-step.

1. Understand the chemical equation:
- The equation shows a chemical reaction where substances on the left-hand side (the reactants) react to form substances on the right-hand side (the products).

2. Identify the substances in the equation:
- On the left side of the equation, we have Zn and 2HCl.
- Zn stands for Zinc.
- HCl stands for Hydrochloric Acid.

3. Confirm the Reactants:
- Zinc (Zn) is a metallic element.
- Hydrochloric acid (HCl) is a compound consisting of hydrogen and chlorine.

Therefore, the reactants in the equation are Zinc (Zn) and Hydrochloric Acid (HCl).

4. Review the options:

A. Zinc chlorate and water.
- Incorrect since the reactants are neither zinc chlorate nor water.

B. Zinc and hydrogen carbonate.
- Incorrect since the reactants do not include hydrogen carbonate.

C. Zinc chloride and hydrogen.
- Incorrect because zinc chloride and hydrogen are the products, not reactants.

D. Zinc and hydrochloric acid.
- Correct since the reactants are zinc (Zn) and hydrochloric acid (HCl).

Thus, the correct answer is:
D. zinc and hydrochloric acid
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