Chemistry - Ionic Equations

• bonkysleuth

  29 Mar 08, 20:32

  Magnesium and hydrochloric acid.

   

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

   

  Is this correct?

• rain-coat

  29 Mar 08, 20:36

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

• bonkysleuth

  29 Mar 08, 20:39

  Originally posted by rain-coat:

  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

  29 Mar 08, 21:00

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

   

   

• Darkness_hacker99

  29 Mar 08, 22:24

  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

  30 Mar 08, 18:58

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