Answer:
The answer to your question is below
Explanation:
This is a double displacement reaction where the cation of one molecule attached to the anion of the other molecule and vice versa.
Ba(OH)₂(aq) + Na₂CO₃(aq) ⇒ BaCO₃ + 2 NaOH
1 ------ Ba ------ 1
1 ------ C ------ 1
2 ----- Na ------ 2
5 ----- O ------ 5
2 ----- H ------ 2