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CaHeK987 [17]
3 years ago
8

Write a balanced equation for when zinc metal reacts with an aqueous hydroxide ions.

Chemistry
1 answer:
xxTIMURxx [149]3 years ago
8 0
<h3><u>Answer and explanation</u>;</h3>
  • Zinc metal reacts with strong bases forming <u>hydrogen gas</u>:

Zn(s) + 2 OH−(aq) → Zn(OH)2(s) + H2(g)

  • Zn2+ is precipitated by hydroxide ions as Zn(OH)2 (white amorphous precipitate)

Zn2+(aq) + 2 OH−(aq) ⇄ Zn(OH)2 (s)

  • By acid excess hydroxide ions, the precipitate is dissolved.

Zn(OH)2(s) + 2 H+(aq) ⇄ Zn2+(aq) + 2 H2O(l)

Zn(OH)2(s) + 2 OH−(aq) ⇄ [Zn(OH)4]2−(aq)

  • [Zn(OH)4]2−(aq) is the <em>complex ion</em>

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