Question

What information do you get from the following chemical equation:

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

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Answer 1

Given chemical equation is a 'single displacement reaction', in which a non-metal is displaced by a metal.  Here, non-metal is hydrogen which is evolved as gas. It is displaced by the metal zinc.  

Explanation:  

Generally, a single displacement reaction follows the below pattern:  A + BC ----> B + AC  

In the given equation  - Zn(s) + 2Hcl(aq)-----> Zncl₂(aq) + H₂(g),  

Zinc (Zn) is a reductant metal that displaces hydrogen (H₂) from aqueous solution of Hydrochloric acid (HCl).

Answer 2

This gives zinc chloride and hydrogen. The word equation is:

Zinc + Hydrochloric acid → Zinc chloride + Hydrogen

Formulae for the products are ZnCl₂ and H₂