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Question

Identify the type of reaction as combination, decomposition, displacement, or double displacement reactions.

Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g)


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Solution

  • Reactivity series helps us to predict the reaction between a metal and an acid.
  • More reactive metals can displace hydrogen from acids and it is liberated as hydrogen gas.
  • In the reactivity series, zinc (Zn) that lies above hydrogen (H), displaces hydrogen from its acid and it is liberated as gas(H2).
  • Therefore, this is a displacement reaction.

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