Qhov sib txawv tseem ceeb ntawm SO2 thiab SO3 yog SO2 yog cov roj tsis muaj xim ntawm chav sov, whereas SO3 yog xim tsis muaj xim mus rau dawb crystalline khoom.
SO2 yog sulfur dioxide thaum SO3 yog sulfur trioxide. Ob leeg yog oxides ntawm sulfur.
SO2 yog dab tsi?
SO2 yog sulfur dioxide. Nws yog ib qho tsis muaj kob uas tsis muaj kob uas muaj cov sulfur thiab oxygen atoms. SO2 yog cov tshuaj formula ntawm no compound. Yog li ntawd, nws muaj ib tug sulfur atom bonded rau ob oxygen atoms ntawm covalent bonds. Ib qho oxygen atom tuaj yeem tsim ob daim ntawv cog lus nrog sulfur atom. Yog li ntawd, sulfur atom yog lub hauv paus atom ntawm lub compound. Cov sulfur atom muaj 6 electrons nyob rau hauv nws sab nrauv orbital. Yog li ntawd tom qab tsim ob ob daim ntawv cog lus nrog cov pa atoms, muaj ob lub electrons ntxiv; cov electrons no muaj nyob ua ib khub electron xwb.
Vim li no, peb tuaj yeem txiav txim siab qhov geometry ntawm SO2 molecule; nws yog angular geometry. SO2 yog polar vim nws geometry (angular) thiab muaj ib leeg electron khub.
Daim duab 01: Cov qauv ntawm Sulfur Dioxide
Sulfur dioxide raug suav tias yog cov pa roj lom. Li no, yog tias muaj SO2 nyob rau hauv cov huab cua, nws yuav yog ib qho qhia txog huab cua phem. Tsis tas li ntawd, cov roj no muaj ntxhiab tsw heev. Molecular loj ntawm sulfur dioxide yog 64 g / mol. Nws yog cov roj tsis muaj xim ntawm chav tsev kub. Lub melting point yog -71 ° C, thaum lub boiling point -10 ° C.
Lub xeev oxidation ntawm sulfur hauv sulfur dioxide yog +4. Yog li ntawd, sulfur dioxide kuj tuaj yeem tsim los ntawm kev txo cov tshuaj sib xyaw ua ke ntawm cov sulfur atoms uas nyob rau hauv lub xeev oxidation ntau dua. Ib qho piv txwv zoo li no yog cov tshuaj tiv thaiv ntawm tooj liab thiab sulfuric acid. Ntawm no, sulfur nyob rau hauv sulfuric acid yog nyob rau hauv lub xeev oxidation ntawm +6. Yog li ntawd, nws tuaj yeem raug txo mus rau +4 oxidation xeev ntawm sulfur dioxide.
Sulfur dioxide tuaj yeem siv rau hauv kev tsim cov sulfuric acid, uas muaj ntau daim ntawv thov hauv kev lag luam thiab cov ntsuas ntsuas. Sulfur dioxide kuj yog ib tug zoo txo tus neeg sawv cev. Txij li thaum lub xeev oxidation ntawm leej faj yog +4 hauv sulfur dioxide, nws tuaj yeem yooj yim oxidized rau +6 oxidation lub xeev, uas tso cai rau lwm qhov sib xyaw kom txo tau.
SO3 yog dab tsi?
SO3 yog sulfur trioxide. Nws yog ib qho khoom sib xyaw uas muaj ib qho sulfur atom uas khi nrog peb cov pa atoms. SO3 yog cov tshuaj formula ntawm no compound. Ntawm no, txhua lub atom oxygen muaj ob daim ntawv cog lus nrog sulfur atom. Cov sulfur atom yog nyob rau hauv nruab nrab ntawm lub molecule. Ib tug sulfur atom muaj 6 electrons nyob rau hauv nws sab nrauv orbital. Yog li ntawd, tom qab tsim peb ob daim ntawv cog lus nrog oxygen atoms, tsis muaj electrons ntxiv nyob rau hauv sulfur atom li sulfur dioxide. Yog li, qhov no txiav txim siab qhov geometry ntawm SO3 molecule; nws muaj trigonal planar geometry. SO3 yog tsis-polar vim nws geometry (trigonal planar) thiab tsis muaj ib leeg electron khub.
Daim duab 02: Geometry ntawm Sulfur Trioxide
Cov molecular loj ntawm sulfur trioxide yog 80.057 g / mol. Lub melting point ntawm SO3 yog hais txog 16.9 ° C, whereas lub boiling point yog 45oC. Nyob rau hauv chav tsev kub thiab siab, sulfur trioxide yog dawb crystalline khoom compound uas yuav fume nyob rau hauv cov huab cua. Nws muaj ib tug pungent tsw. Lub xeev oxidation ntawm sulfur hauv sulfur trioxide yog +6.
Nyob hauv nws daim ntawv gaseous, sulfur trioxide yog cov pa phem thiab yog ib feem tseem ceeb hauv cov kua qaub nag. Txawm li cas los xij, sulfur trioxide tseem ceeb heev hauv kev tsim cov sulfuric acid hauv kev lag luam. Nws yog vim sulfur trioxide yog anhydride daim ntawv ntawm sulfuric acid.
SO3(l) + H2O(l) → H 2SO4(l)
Cov tshuaj tiv thaiv saum toj no nrawm heev thiab exothermic. Yog li, kev tswj hwm yuav tsum tau siv thaum siv sulfur trioxide rau kev tsim cov sulfuric acid. Tsis tas li ntawd, sulfur trioxide yog ib qho tseem ceeb reagent hauv txheej txheem Sulfonation.
Qhov txawv ntawm SO2 thiab SO3 yog dab tsi?
SO2 yog sulfur dioxide thaum SO3 yog sulfur trioxide. Ob leeg yog oxides ntawm sulfur. Qhov sib txawv tseem ceeb ntawm SO2 thiab SO3 yog tias SO2 yog cov roj tsis muaj xim ntawm chav sov, whereas SO 3 yog xim tsis muaj xim rau dawb crystalline khoom. Tsis tas li ntawd, lub xeev oxidation ntawm sulfur hauv sulfur dioxide yog +4 thaum sulfur trioxide yog +6. Vim muaj ib leeg electron khub thiab lawv cov geometry, sulfur dioxide yog ib tug polar compound, thaum sulfur trioxide yog ib tug nonpolar compound. Cov nram qab no infographic qhia txog qhov sib txawv ntawm SO2 thiab SO3.
Summary – SO2 vs SO3
SO2 yog sulfur dioxide, thiab SO3 yog sulfur trioxide. Ob leeg yog oxides ntawm sulfur. Qhov sib txawv tseem ceeb ntawm SO2 thiab SO3 yog tias SO2 yog cov roj tsis muaj xim ntawm chav sov, whereas SO 3 yog xim tsis muaj xim rau dawb crystalline khoom.
