Chemistry - Ionic Equations

bonkysleuth SG

Magnesium and hydrochloric acid.

I got the overall ionic equation as 2H+ -> H2

Is this correct?

rain-coat SG

nope. Mg2+ + 2H- = H2. if i rmb correctly its like that.

bonkysleuth SG

nope. Mg2+ + 2H- = H2. if i rmb correctly its like that.

I think there's something wrong with that. Cuz if the case is really what you have written, did you notice the chemical formula doesn't balance up? Ionic equation has to be balanced and the charges must be equal.

For example, if there's a charge of 0 on the left side, right hand side must also have a charge of 0.

LatecomerX SG

Mg(s) + 2 H+(aq) => Mg2+(aq) + H2(g)

Darkness_hacker99 SG

Write a balance chemical equation first.

Mg(s) + 2HCl(aq) --> MgCl₂(aq) + H₂(g)

Mg(s) + 2H⁺(aq) + 2Cl^-(aq) --> Mg(aq) + 2Cl^-(aq) + H₂(g)

Cancel the same side
Left with

Mg(s) + 2H⁺(aq) --> Mg²⁺(aq) + H₂(g)

rain-coat SG

oh right. sorry, forgot that element got no charge.