net ionic equations (1 Viewer)

[poopoohead]

ive got a titration assessment tomorrow. Im not sure if one the questions will ask to write a net ionic equation. Ive kind of forgotten how to write them- so i was wondering is there any person who can give me a little help.

Lets say I was asked to perform a titration using Sodium Hydroxide and Oxalic Acid. I know the equation is:

2NaOH(aq) + H2C2O4(aq) > Na2C2O4(aq) + 2H2O(l)

What would be the net ionic equation?

just another example so i can fully understand it.

Reaction between Sodium Carbonate and Hydrochloric acid

Na2CO3(aq) + 2HCL(aq) > 2NaCl(aq) +H2O(l) + CO2(g)

What be the net ionic equation in this case????

 

[insert-username]

Net ionic equations have only those atoms taking part in a reaction. E.g. those atoms which remain in aqueous species on both sides of the neutral species reaction don't get included in the net ionic equation. To write it, simply write the ions taking part in the reaction and none of the others.

2NaOH(aq) + H2C2O4(aq) > Na2C2O4(aq) + 2H2O(l)

The Na and the C₂O₄ remain aqueous on both sides, so we can ignore them. The net ionic equation is hence:

2OH^- (aq) + 2H⁺ (aq) -> 2H₂O (l)

Na2CO3(aq) + 2HCL(aq) > 2NaCl(aq) +H2O(l) + CO2(g)

The Na and the Cl remain aqueous on both sides this time, so we leave them out:

CO₃^2- (aq) + 2H⁺ (aq) -> H₂O (l) + CO₂ (g)

Hope that helps,


I_F

 

[poopoohead]

thanks