Chemical equation of excess SO2 in sodium carbonate solution

Chemical equation of excess SO2 in sodium carbonate solution

Excess SO2:2SO2+Na2CO3+H2O==2NaHSO3+CO2↑
If SO2 is small: SO2+Na2CO3==Na2SO3+H2O+CO2↑

Add a small amount of acetic acid to sodium carbonate solution

Chemical equation: Na2CO3+CH3COOH=NaHCO3+CH3COONa
Ion equation: CO3^2-+CH3COOH==HCO3-+CH3COO-