NaOH+SO2
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NaOH+SO2
2NaOH+SO2=Na2SO3+H2O
2NaOH+SO2=Na2SO3+H2O(SO2少量时)
NaOH+SO2=NaHSO3 (SO2过量时)
NaOH+SO2
2NaOH+SO2=Na2SO3+H2O
2NaOH+SO2=Na2SO3+H2O(SO2少量时)
NaOH+SO2=NaHSO3 (SO2过量时)