Qhov sib txawv tseem ceeb ntawm thawj thiab theem nrab qhov tseem ceeb yog qhov tseem ceeb ntawm qhov tseem ceeb yog lub xeev oxidation ntawm lub hauv paus hlau atom ntawm kev sib koom ua ke, qhov thib ob valency yog tus lej sib koom ntawm lub hauv paus hlau atom ntawm kev sib koom ua ke.
Cov ntsiab lus tseem ceeb thiab theem nrab valency poob rau hauv kev sib koom tes chemistry. Valency yog lub zog sib txuas ntawm lub ntsiab lus, tshwj xeeb tshaj yog ntsuas los ntawm tus naj npawb ntawm hydrogen atoms nws tuaj yeem txav los yog ua ke nrog.
Primary Valency yog dab tsi?
Primary valency yog lub xeev oxidation ntawm lub hauv paus hlau atom ntawm kev sib koom ua ke. Ib qho kev sib koom ua ke yog ib qho nyuaj uas muaj cov hlau ion ntawm qhov chaw, uas yog ib puag ncig los ntawm ntau lub atoms lossis pawg ntawm atoms. Cov tsiaj nyob ib puag ncig no hu ua ligands. Lub hauv paus hlau atom khi nrog qee tus lej ntawm ligands nyob ntawm qhov teeb tsa hluav taws xob ntawm lub atom. Tus lej ntawm ligands uas khi rau lub hauv paus hlau atom yog hu ua tus lej sib koom.
Dhau li ntawm, lub hauv paus hlau atom muaj nws lub xeev oxidation. Peb tuaj yeem xam lub xeev oxidation siv cov tshuaj formula ntawm lub complex. Ntawm no, yog tias peb paub cov nqi hluav taws xob ntawm qhov nyuaj, cov nqi thiab cov lej ntawm cov ligands txuas rau cov hlau atom, peb tuaj yeem xam cov oxidation xeev tau yooj yim. Hauv lwm lo lus, qhov tseem ceeb tshaj plaws yog tus lej ntawm ligands peb xav tau kom txaus siab rau tus nqi ntawm cov hlau ion.
Tus nqi thib ob yog dab tsi
Secondary valency yog tus lej sib koom tes ntawm lub hauv paus hlau atom ntawm kev sib koom ua ke. Tus lej sib koom ua ke yog tus lej ntawm ligands txuas nrog lub hauv paus hlau atom. Cia peb xav txog ib qho piv txwv kom nkag siab ob qho tib si thawj thiab theem nrab valences. Hauv kev sib koom ua ke K4[Fe(CN)6] lub hauv paus hlau atom yog hlau (Fe).
Daim duab 02: Kev sib koom tes ntawm Sulfur nyob rau hauv qhov kev sib koom ua ke yog plaub
Peb tuaj yeem suav qhov tseem ceeb hauv qab no:
- Tus nqi ntawm cov poov tshuaj ligand ib txwm +1.
- Tus nqi ntawm cyanide ligand (CN) yog ib txwm -1.
- Muaj plaub lub ligands uas sib npaug +4 nqi.
- Muaj rau cyanide (CN) ligands uas sib npaug -6 nqi.
- Tom qab ntawd peb tuaj yeem xam lub xeev oxidation ntawm Fe raws li hauv qab no:
Tus nqi tag nrho ntawm lub complex=0
0=[(tus nqi ntawm cov poov tshuaj ligand) x 4] + [tus nqi ntawm Fe ion] + [(tus nqi ntawm cyanide ligand) x 6]
0=[(+1) x 4] + [tus nqi ntawm Fe ion] + [(-1) x 6]
0=4 + [tus nqi ntawm Fe ion] - 6
nqi ntawm Fe ion=+2
oxidation xeev ntawm Fe=+2
Qhov txawv ntawm qhov tseem ceeb thiab theem ob yog dab tsi?
Cov ntsiab lus thawj thiab theem nrab qhov tseem ceeb poob rau hauv thaj chaw ntawm kev sib koom tes chemistry. Ntawm no, qhov sib txawv tseem ceeb ntawm thawj thiab theem nrab valency yog tias thawj qhov tseem ceeb yog lub xeev oxidation ntawm lub hauv paus hlau atom ntawm kev sib koom ua ke. Tab sis, theem nrab valency yog tus naj npawb ntawm kev sib koom tes ntawm lub hauv paus hlau atom ntawm kev sib koom ua ke. Ntxiv mus, thawj qhov tseem ceeb yog tus lej ntawm ligands peb xav tau kom txaus siab rau tus nqi ntawm cov hlau ion, thaum lub sijhawm thib ob yog cov lej ntawm ligands txuas rau hauv nruab nrab hlau atom.
Hauv qab infographic qhia txog qhov sib txawv ntawm qhov tseem ceeb thiab theem nrab.
Summary – Thawj Vs Me Nyuam Kawm Ntawv Qib Siab
Cov ntsiab lus tseem ceeb thiab theem nrab valency poob rau hauv kev sib koom tes chemistry. Qhov sib txawv tseem ceeb ntawm thawj thiab theem nrab valency yog qhov tseem ceeb valency yog lub xeev oxidation ntawm lub hauv paus hlau atom ntawm kev sib koom ua ke. Tab sis, qhov thib ob qhov tseem ceeb yog qhov sib koom tes ntawm lub hauv paus hlau atom ntawm kev sib koom ua ke.
