Answer :
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
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
