9
9xletinh
S + O2 --> SO2![]()
[TEX] \downarrow \ [/TEX] 6
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SO2 + H2O ----> H2SO3
H2SO3 + NaOH --> Na2SO3 + H2O
Na2SO3 + HCL=> NaCl + SO2 + H2O
SO2 + Ca(OH)2------>CaSO3 + H2O
CaSO3 + NaOH------->Na2SO3 + Ca(OH)2
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