摘要:(1)H2+SH2S (2)H2SO3 + 2H2S=3S + 3H2O (3)C+2H2SO4(浓)CO2 ↑+2SO2 ↑+2H2O或Cu+ 2H2SO4(浓)CuSO4 +SO2 ↑+ 2H2O等 (4)①H2SO3 +2OH- = SO32- + 2H2O ②大于,Na2SO3溶液中SO32-发生水解使溶液显碱性. ③增大,升高温度促进Na2SO3溶液的水解.

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