Qhov sib txawv tseem ceeb ntawm ob qhov kev hloov pauv thiab cov tshuaj tiv thaiv kev puas tsuaj yog tias ob qhov kev hloov pauv hloov pauv yog cov tshuaj lom neeg uas cov khoom ntawm ob lub reactants hloov ib leeg whereas ob qhov decomposition tshwm sim yog ib daim ntawv ntawm ob qhov kev hloov pauv nyob rau hauv uas ib los yog ntau reactants tsis yaj nyob rau hauv cov kuab tshuaj.
Ob lo lus "ob chav hloov pauv" thiab "ob chav decomposition" cov tshuaj tiv thaiv piav qhia tib hom tshuaj tiv thaiv, tshwj tsis yog, "ob chav decomposition" yog lo lus qub. Yog li ntawd, lo lus qub no tau hloov pauv los ntawm lo lus tshiab, "ob chav hloov chaw" vim tias lo lus no piav qhia lub tswv yim tiag tiag ntawm cov tshuaj tiv thaiv; ib qho kev khiav tawm. Ntxiv mus, peb siv lo lus laus thaum ib los yog ntau dua reactants tsis yaj nyob rau hauv cov kuab tshuaj.
Dab tsi yog qhov kev hloov pauv hloov pauv?
Cov kev hloov pauv ob zaug yog ib hom tshuaj tiv thaiv uas cov khoom ntawm ob lub reactants hloov ib leeg los tsim cov khoom tshiab. Nyob rau hauv cov kev tshwm sim no, cov cation thiab anions nyiam mus rau qhov kev hloov pauv no. Feem ntau, cov khoom kawg ntawm cov tshuaj tiv thaiv no yog precipitate. Yog li ntawd, cov khoom kawg yog txawv kiag li ntawm cov reactants.
Daim duab 01: Tsim cov Nyiaj Chloride Precipitate
Peb tuaj yeem sau qhov sib npaug dav rau qhov kev hloov pauv ob zaug raws li hauv qab no.
A-B + C-D → C-B + A-D
Hauv qhov sib npaug saum toj no, A thiab C Cheebtsam ntawm txhua tus reactant tau hloov lawv qhov chaw. Feem ntau, cov tshuaj tiv thaiv no tshwm sim hauv cov tshuaj aqueous. Tsis tas li ntawd, peb tuaj yeem faib cov kev cuam tshuam no raws li hauv qab no;
- nag xob nag cua tshwm sim - Cov ntaub ntawv nag lossis daus thaum kawg ntawm cov tshuaj tiv thaiv. Piv txwv li, cov tshuaj tiv thaiv ntawm cov nyiaj nitrate thiab sodium chloride ua cov nyiaj chloride precipitate thiab aqueous sodium nitrate.
- Neutralization cov tshuaj tiv thaiv - Cov kua qaub neutralizes raws li cov tshuaj tiv thaiv nrog lub hauv paus. Piv txwv li, cov tshuaj HCl (acid) tuaj yeem ua rau nruab nrab ntawm cov tshuaj NaOH (piv txwv).
Dab tsi yog qhov kev tawm tsam ob tog?
Ob chav decomposition tshwm sim yog ib hom kev hloov pauv ob zaug uas ib lossis ntau cov reactants yog insoluble hauv cov kuab tshuaj. Txawm li cas los xij, tib neeg feem ntau siv lo lus no raws li cov laus version ntawm ob qhov kev hloov pauv hloov. Ua piv txwv, cov tshuaj tiv thaiv ntawm zinc sulfide thiab hydrochloric acid tsim zinc chloride thiab hydrogen sulfide gas. Nyob ntawd, zinc sulfide yog nyob rau hauv lub xeev cov khoom, undissolved nyob rau hauv lub aqueous nruab nrab.
Dab tsi yog qhov txawv ntawm Ob Qhov Kev Hloov Pauv thiab Ob Qhov Kev Tawm Tsam Tawm Tsam?
Cov kev hloov pauv ob zaug yog ib hom tshuaj tiv thaiv uas cov khoom ntawm ob lub reactants hloov ib leeg los tsim cov khoom tshiab. Peb siv lo lus ob chav decomposition tshwm sim raws li lub npe qub ntawm ob qhov kev hloov pauv hloov. Txawm li cas los xij, peb siv lo lus no rau lub npe hloov chaw cov tshuaj tiv thaiv uas muaj ib lossis ntau dua reactants, uas yog insoluble hauv cov kuab tshuaj. Cov nram qab no infographic nthuav tawm qhov sib txawv ntawm ob qhov kev hloov pauv thiab ob qhov kev sib cais ntawm cov tshuaj tiv thaiv hauv daim ntawv.
Summary – Ob Chav Displacement vs Ob Chav Decomposition Reaction
Ob qhov kev hloov pauv thiab ob qhov kev cuam tshuam kev puas tsuaj piav qhia tib lub tswv yim ntawm ib hom tshuaj tiv thaiv. Txawm li cas los xij, lawv txawv ntawm ib leeg raws li qhov xwm txheej ntawm cov reactants nrog rau kev siv lub sij hawm. Qhov sib txawv ntawm ob qhov kev hloov pauv thiab cov tshuaj tiv thaiv ob lub decomposition yog tias ob qhov kev hloov pauv hloov pauv yog tshuaj lom neeg cov tshuaj tiv thaiv nyob rau hauv uas cov khoom ntawm ob reactants pauv nrog ib leeg whereas ob lub decomposition cov tshuaj tiv thaiv yog ib daim ntawv ntawm ob qhov kev hloov pauv nyob rau hauv uas ib los yog ntau reactants tsis yaj. hauv cov kuab tshuaj.
