Question

What is the name of the compound with the formula `Na_2CO_3`?

Answer 1

`"Sodium carbonate........."`

Explanation:

The salt derives from `Na^+`, and `CO_3^(2-)`.
`CO_3^(2-)` is called the carbonate ion
You will need 2 sodium ions (`Na^+`) to even out the charges:

`2Na^+ +CO_3^(2-) ->Na_2CO_3`

Sodium hydrogen carbonate or sodium bicarbonate is:

`Na^(+) +HCO_3^(-) ->NaHCO_3`