Question

write a net ionic equation for the overall reaction that occurs when aqueous solutions of carbonic acid (h2co3) and sodium hydroxide are combined. assume excess base. be sure to specify states such as (aq) or (s).

Explanation:

Step1: Write the balanced molecular equation

$H_2CO_3(aq)+2NaOH(aq)
ightarrow Na_2CO_3(aq) + 2H_2O(l)$

Step2: Write the complete ionic equation

$2H^+(aq)+CO_3^{2 -}(aq)+2Na^+(aq)+2OH^-(aq)
ightarrow 2Na^+(aq)+CO_3^{2 -}(aq)+2H_2O(l)$

Step3: Cancel out the spectator ions

Spectator ions are $Na^+$ and $CO_3^{2 -}$. After canceling, we get the net - ionic equation.
$H^+(aq)+OH^-(aq)
ightarrow H_2O(l)$

Answer:

$H^+(aq)+OH^-(aq)
ightarrow H_2O(l)$