1) Zn + 2HCl ----> Zn Cl2 + H2

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Solution

This is a metal/acid reaction if carried out in aqueous solution.
It is also a displacement reaction where 1 atom of Zinc displaces 2 H+ ions
and it is a redox reaction as the Zn atom loses electrons (it is OXIDISED) and the 2 H+ ions gain electrons (they are REDUCED)

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Z n + 2 H C l \to Z n C l_{2} + H_{2} ↑

Z n + 2 H C l \to Z n C l_{2} + H_{2}

Zn + 2HCl ➝ $Z n C l_{2}$ + ………….. ↑

The reaction, Zn + 2HCl → ZnCl₂+ H₂is an example of:

To prepare 1 g of hydrogen molecules using hydrochloric acid how many grams of zinc should be taken?

Zn +2HCl ------>ZnCl2 + H2

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