Question

What are the correct half reactions for the following reaction:
Zn + 2 HCI -> H₂ +zncl2

Answer 1

Zn(s) + 2H+(aq) => Zn²+(aq) + H2 (g)

Step-by-step explanation:

The equation Zn + 2 HCI -> H₂ +zncl2 on reduction and oxidation, it results as below;

• 2H+ + 2e- => H2 ; reduction
• Zn => Zn²+ + 2e- ; oxidation

The equations above are half cell.

On combination of the above half cell reaction equations gives;

Zn(s) + 2H+(aq) => Zn²+(aq) + H2 (g).

Therefore, the half reaction equation for Zn + 2 HCI -> H₂ +zncl2 is given by;

Zn(s) + 2H+(aq) => Zn²+(aq) + H2 (g).