Question

identify the major ionic species present in an aqueous solution of na2co3. na2+, co32- na2+, c2-, o3 na+, c4+, o32- na+, c+, o2- na+, co32-

Explanation:

Step1: Analyze sodium carbonate dissociation

Sodium carbonate ($Na_2CO_3$) is an ionic compound. In an aqueous solution, it dissociates. The chemical - formula $Na_2CO_3$ indicates that for every formula unit of $Na_2CO_3$, there are 2 sodium ions ($Na^+$) and 1 carbonate ion ($CO_3^{2 - }$). The dissociation equation is $Na_2CO_3(s)
ightarrow2Na^+(aq)+CO_3^{2 - }(aq)$.

Answer:

$Na^+, CO_3^{2 - }$ (the last option)