\(a,m_{CH_3COOH}=\dfrac{200.10}{100}=20\left(g\right)\\ \rightarrow n_{CH_3COOH}=\dfrac{20}{60}=\dfrac{1}{3}\left(mol\right)\)
PTHH: 2CH3COOH + Na2CO3 ---> 2CH3COONa + CO2 + H2O
\(\dfrac{1}{3}\)-------------->\(\dfrac{1}{6}\)
b, => mNa2CO3 = \(\dfrac{1}{6}.106=\dfrac{53}{3}\left(g\right)\)