Write the equation between Zn and HCl, Zn(s) +2HCl(aq) -> H2(g) + ZnCl2(aq) in complete ionic form and in net-ionic form.

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justaguide | College Teacher | (Level 2) Distinguished Educator

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To write the equation for a reaction in ionic form, we indicate the ionic species that actually exist in solution.

For the reaction between zinc and hydrogen chloride, the equation in the ionic equation form is:

Zn + 2H+ + 2Cl- --> H2 + Zn2+ + 2Cl-

The net ionic equation is arrived at by looking at ions that do not undergo a change. These are known as spectator ions and can be eliminated from both the sides.

In the reaction between zinc and hydrogen chloride, we see that the Cl- ions are common on both the sides of the equation. They are spectator ions and can be eliminated.

The resultant net ionic equation is:

Zn + 2H+ --> H2 + Zn2+

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