Qhov sib txawv tseem ceeb ntawm qhov sib npaug sib npaug thiab qhov sib npaug ntawm cov pob txha yog qhov sib npaug sib npaug muab cov naj npawb ntawm cov molecules ntawm txhua tus reactant thiab cov khoom koom nrog cov tshuaj tiv thaiv thaum lub cev sib npaug tsuas yog muab cov reactants ntawm cov tshuaj tiv thaiv xwb.
Kev sib npaug tshuaj lom neeg yog qhov sawv cev ntawm cov tshuaj tiv thaiv tshuaj. Qhov ntawd txhais tau tias; cov tshuaj sib npaug muab cov reactants ntawm cov tshuaj tiv thaiv, cov khoom kawg thiab cov kev taw qhia ntawm cov tshuaj tiv thaiv ib yam nkaus. Muaj ob hom kev sib npaug li qhov sib npaug sib npaug thiab qhov sib npaug ntawm lub cev.
Dab tsi yog qhov sib npaug?
Kev sib npaug tshuaj sib npaug muab tus lej tiag tiag ntawm txhua tus reactant uas cuam tshuam nrog ib leeg thiab tus naj npawb ntawm cov khoom lag luam tsim. Nws yog ib qho kev sib npaug kom ntxaws uas muab qhov sib piv ntawm cov reactants thiab cov khoom. Thaum xam cov parameter xws li tus nqi ntawm cov khoom peb tau txais los ntawm cov tshuaj tiv thaiv, peb yuav tsum siv cov tshuaj sib npaug sib npaug; txwv tsis pub, peb yuav tsis paub ntau npaum li cas ntawm reactants reacts muab ntau npaum li cas ntawm cov khoom.
Txawm li cas los xij, hauv kev ntsuas ntsuas kub, qhov sib npaug no tsis ua haujlwm thaum txiav txim siab qhov kev txiav txim ntawm cov tshuaj tiv thaiv vim peb yuav tsum txiav txim siab qhov kev txiav txim ntawm cov tshuaj tiv thaiv tseem ceeb ntawm txoj kev sim. Nyob rau hauv kev sib npaug tshuaj sib npaug, qhov tseem ceeb nyob rau hauv pem hauv ntej ntawm lub molecule yog hu ua "stoichiometric coefficient"; stoichiometry yog tus lej kev sib raug zoo ntawm cov reactants thiab cov khoom.
2Na2O ⟶ 4Na + O2
Cov tshuaj tiv thaiv saum toj no yog ib qho piv txwv ntawm kev sib npaug tshuaj lom neeg. Nws muab cov decomposition ntawm sodium oxide (Na2O). Qhov sib npaug ib txwm los yog qhov sib npaug ntawm cov pob txha ntawm cov tshuaj tiv thaiv no yog Na2O ⟶ Na + O2 Thaum ntsuas qhov sib npaug, peb tuaj yeem siv ob txoj hauv kev: txoj kev tshuaj xyuas thiab tus lej oxidation.
Txoj kev tshuaj xyuas suav nrog ntsuas qhov sib npaug tshuaj los ntawm kev saib cov reactants thiab cov khoom. Hauv cov tshuaj tiv thaiv no, sodium oxide yog cov reactant, thiab nws muaj ob lub sodium atoms thiab ib qho oxygen atom ib molecule. Tab sis nyob rau sab ntawm cov khoom, muaj ib tug sodium atom thiab ob oxygen atoms. Yog li ntawd, ua ntej, peb tuaj yeem ntxiv ib qho stoichiometric coefficient rau sab reactant; nws yog 2. Tom qab ntawd, nyob rau sab reactant, muaj plaub lub sodium atoms thiab ob lub pa oxygen atom. Txij li thaum muaj ob lub pa oxygen atoms nyob rau hauv cov khoom lag luam ib yam nkaus, peb tuaj yeem ntxiv "4" raws li stoichiometric coefficient ntawm sodium hauv cov khoom sab kom sib npaug qhov sib npaug. Tam sim no tus naj npawb ntawm atoms nyob rau hauv txhua sab yog sib npaug; yog li, peb tau txais kev sib npaug tshuaj sib npaug.
Dab tsi yog Skeleton Equation?
Skeleton equation muab cov hom reactants koom nrog cov tshuaj tiv thaiv thiab cov khoom kawg. Txawm li cas los xij, qhov no tsis muab qhov tseeb piv ntawm cov reactants thiab cov khoom. Yog li ntawd, cov ntsiab lus tseem ceeb uas peb tuaj yeem tau txais los ntawm qhov sib npaug ntawm cov pob txha yog cov reactants ntawm cov tshuaj tiv thaiv, cov khoom ntawm cov tshuaj tiv thaiv thiab cov kev taw qhia ntawm cov tshuaj tiv thaiv. Rau cov tshuaj tiv thaiv saum toj no, cov tshuaj tiv thaiv pob txha yog raws li hauv qab no;
Na2O ⟶ Na + O2
Dab tsi yog qhov sib txawv ntawm qhov sib npaug sib npaug thiab qhov sib npaug ntawm pob txha?
Qhov sib txawv tseem ceeb ntawm qhov sib npaug sib npaug thiab qhov sib npaug ntawm cov pob txha yog qhov sib npaug sib npaug muab cov naj npawb ntawm cov molecules ntawm txhua tus reactant thiab cov khoom koom nrog cov tshuaj tiv thaiv, qhov sib npaug ntawm lub cev tsuas yog muab cov reactants ntawm cov tshuaj tiv thaiv xwb. Tsis tas li ntawd, qhov sib npaug sib npaug yuav los yog tsis muaj stoichiometric coefficients thaum lub cev sib npaug tsis muaj stoichiometric coefficients. Piv txwv li, qhov sib npaug ntawm cov tshuaj sib npaug rau qhov kev puas tsuaj ntawm sodium oxide yog 2Na2O ⟶ 4Na + O2 thaum lub cev sib npaug yog Na 2O ⟶ Na + O2
Cov lus qhia hauv qab no qhia txog qhov sib txawv ntawm qhov sib npaug sib npaug thiab lub cev pob txha.
Summary – Balanced Equation vs Skeleton Equation
Kev sib npaug sib npaug thiab kev sib npaug ntawm pob txha yog ob txoj hauv kev sau cov tshuaj sib npaug rau cov tshuaj tiv thaiv tshwj xeeb. Hauv cov ntsiab lus, qhov sib txawv tseem ceeb ntawm qhov sib npaug sib npaug thiab qhov sib npaug ntawm cov pob txha yog qhov sib npaug sib npaug muab cov naj npawb ntawm cov molecules ntawm txhua tus reactant thiab cov khoom koom nrog cov tshuaj tiv thaiv, qhov sib npaug ntawm cov pob txha tsuas muab cov reactants ntawm cov tshuaj tiv thaiv xwb.
