Friday, November 19, 2010

Is there a difference between an ionic equation and a net ionic equation?

I am working on a chemistry assignment, and am stuck on the question

';Write the ionic equation to show the formation of each precipitate';



I'm not sure how to write an ionic equation. Is it the same thing as a net ionic equation or are they two different things?Is there a difference between an ionic equation and a net ionic equation?
here's an empirical equation



Na2CO3 + 2 HCl ---%26gt; 2 NaCl + CO2 + H2O



ionic equations show all dissolved ions



2 Na+ + CO3-- + 2 H3O+ + 2 Cl- ----%26gt; 2 Na+ + 2 Cl- + CO2 + 3 H2O



net ionic leaves out the spectators - the unchanged stuff



CO3-- + 2 H3O+ ---%26gt; CO2 + 3 H2OIs there a difference between an ionic equation and a net ionic equation?
A net ionic equation is an ionic equation* with all spectator ions eliminated. For example, Ag+(aq) + NO3-(aq) + Na+(aq) + Cl-(aq) = AgCl(s) + Na+(aq) + NO3-(aq) is an ionic equation; the net ionic equation would be Ag+(aq) + Cl-(aq) = AgCl(s) because the sodium and nitrate ions are spectators (they appear on both sides of the ionic equation.

Simplified: Break into ions, remove spectators



An ionic equation is a balanced chemical equation in which strong electrolytes are written as dissociated ions. For example, Ag+(aq) + NO3-(aq) + Na+(aq) + Cl-(aq) = AgCl(s) + Na+(aq) + NO3-(aq) is an ionic equation; AgNO3(aq) + NaCl(aq) = AgCl(s) + NaNO3(aq) is not.

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