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Balance: zinc + hydrochloric acid.

Exercise and reference answers

Left
  1. Coefficient
    1
    Formula
    Zn
  2. Coefficient
    2
    Formula
    HCl
Right
  1. Coefficient
    1
    Formula
    ZnCl₂
  2. Coefficient
    1
    Formula
    H₂
Instructions
Reactivity series — Zn displaces H from HCl.

Explanation

_Source: syllabus Science, Ch 3 'Metals and Non-Metals' §3.2.6_
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