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is Zn+2HCL--->ZnCl subscript2+H subscript2

5 answers

The reaction you provided is almost correct but needs to be adjusted for proper stoichiometry and notation. The balanced chemical equation for the reaction between zinc (Zn) and hydrochloric acid (HCl) is:

\[ \text{Zn} + 2 \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \]

In this equation:

  • Zn reacts with 2 moles of HCl to produce 1 mole of zinc chloride (ZnCl₂) and 1 mole of hydrogen gas (H₂).
  • ZnCl₂ is zinc chloride, and H₂ is molecular hydrogen.

Make sure to use proper subscripts for chemical formulas.

so no

Correct, your original equation had some inaccuracies in terms of subscripting and stoichiometry. The properly balanced equation is:

\[ \text{Zn} + 2 \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \]

To clarify:

  • Zn is zinc.
  • HCl is hydrochloric acid, and you need 2 molecules for the reaction.
  • ZnCl₂ is zinc chloride, with the subscript '2' indicating two chloride ions.
  • H₂ is hydrogen gas, which is produced as the reaction occurs.

So, the answer is that your initial equation needed correction, and the correct representation is shown above.

what about these
Zn+HCl-->ZnCl subscript2+H subscript2
Zn+2HCl-->ZnCl subscript2+2H subscript2
Zn+4HCl-->ZnCl subscript2+2H subscript2
which of these is right

Let’s analyze each of the provided equations:

  1. \( \text{Zn} + \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \)

    • This equation is not balanced. It suggests that 1 mole of Zn reacts with 1 mole of HCl to produce 1 mole of ZnCl₂ and 1 mole of H₂. This is incorrect because Zn requires 2 moles of HCl to completely react.

  2. \( \text{Zn} + 2 \text{HCl} \rightarrow \text{ZnCl}_2 + 2 \text{H}_2 \)

    • This equation is also not balanced. It suggests that 1 mole of Zn reacts with 2 moles of HCl to produce 1 mole of ZnCl₂ and 2 moles of H₂, which is incorrect. In reality, 1 mole of Zn produces only 1 mole of H₂ gas.

  3. \( \text{Zn} + 4 \text{HCl} \rightarrow \text{ZnCl}_2 + 2 \text{H}_2 \)

    • This equation is likewise not balanced. While it shows the correct formation of ZnCl₂, it indicates that 4 moles of HCl produce 2 moles of H₂, which is incorrect.

Correct Balanced Equation

The correct balanced equation for the reaction between zinc and hydrochloric acid is:

\[ \text{Zn} + 2 \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \]

This means:

  • 1 mole of Zn reacts with 2 moles of HCl to produce 1 mole of ZnCl₂ and 1 mole of H₂ gas.

So, to answer your question: None of the equations you provided are correct. The correct version is \( \text{Zn} + 2 \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \).