Sulfurdioxide一、Preparationofsulfurdioxide二、PhysicalpropertiesofSO2Undernormalcircumstances,sulfurdioxideisakindofcolorlessgaswithaverypungent([‘pʌndʒənt]刺激性),whatphysicalpropertiescanyouget?Easilysolubleinwater(1:40).Easilyliquefied,?三、chemicalpropertiesofSO2let’,SO2isanacidicoxide二氧化硅与二氧化碳的比较CO2SO2WithbasicoxideWithbasewithwaterWithsaltCaO+SO2CaSO3高温CO2+2NaOH=Na2CO3+H2OSO2+2NaOH=Na2SO3+H2OCO2+Na2CO3+H2O=+NaOH=NaHSO3(excess)LikeCO2,IfyouPassSO2throughlimewater[Ca(OH)2],+H2O+CaSO3=Ca(HSO3)2CalciumbisulfiteEnlargeyouviewstalagmite['stæləɡmait,stə'læɡmait]石笋;石笋状stalactite['stæləktait,stə'læktait]钟乳石SO2+Na2CO3=(insufficient)SO2+2NaHCO3=Na2SO3+2CO2+H2O(insufficient)Na2SO3+CO2SO2+Na2CO3(excess)—NaHSO3+CO2+H2O22SO2+NaHCO3=NaHSO3+CO2(excess)—
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