What is the net ionic equation that represents a neutralization reaction between H2SO4 and NaOH?

##2H^+ (aq) +2OH^-####(aq) -> 2H_2O (l)##

First step is to predict the products side of the reaction and then balance the equation . Take note of solubility rules when predicting products to know if they are aqueous, liquid, solid, etc.

(1) ##H_2SO_4 (aq) + 2NaOH (aq) -> 2H_2O (l) + Na_2SO_4 (aq)##

Next, separate the strong electrolytes and ionic compounds into their respective ions :

(2) ##2H^+ (aq) + SO_4^"2-" (aq) + 2Na^+ (aq) + 2OH^-####(aq) -> 2H_2O (l) + 2Na^+ (aq) + SO_4^"2-" (aq)##

Lastly, remove the spectator ions common in both sides of the equation, which leaves us with:

(3) ##2H^+ (aq) +2OH^-####(aq) -> 2H_2O (l)##

NOTE : Liquid/Solid/Gaseous compounds should be left unionized (left as is).