Answer : The number of moles of carbonate ion, [tex](CO_3^{2-})[/tex] produced are, 0.207 moles.
Explanation : Given,
Moles of sodium carbonate = 0.207 mol
As we know that when sodium carbonate dissolved in water then it dissociates to give 2 sodium ion and 1 carbonate ion.
The balanced chemical reaction will be:
[tex]Na_2CO_3(aq)\rightarrow 2Na^+(aq)+CO_3^{2-}(aq)[/tex]
From the balanced chemical reaction we conclude that,
As, 1 mole of sodium carbonate dissociate to give 1 moles of carbonate ion, [tex](CO_3^{2-})[/tex]
So, 0.207 mole of sodium carbonate dissociate to give 0.207 moles of carbonate ion, [tex](CO_3^{2-})[/tex]
Thus, the number of moles of carbonate ion, [tex](CO_3^{2-})[/tex] produced are, 0.207 moles.