\(n_{NaCl}=0,1.0,2=0,02\left(mol\right)\)
\(m_{Na_2CO_3}=0,1.0,3=0,03\left(mol\right)\)
\(\left\{{}\begin{matrix}n_{Na^+}=0,02+0,03.2=0,08\left(mol\right)\\n_{Cl^-}=0,02\left(mol\right)\\n_{CO_3^{2-}}=0,03\left(mol\right)\end{matrix}\right.\)
=> \(\left\{{}\begin{matrix}C_{M\left(Na^+\right)}=\dfrac{0,08}{0,2+0,3}=0,16M\\C_{M\left(Cl^-\right)}=\dfrac{0,02}{0,2+0,3}=0,04M\\C_{M\left(CO_3^{2-}\right)}=\dfrac{0,03}{0,2+0,3}=0,06M\end{matrix}\right.\)