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Reactivity series ntawm Hlau | Hloov Kho 2021

Cov cuab yeej piav qhia txog kev siv tshuaj lom neeg tshwm sim li cas

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Xov Xwm Tsuas yog 5% ntawm POPULATION yuav paub

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muaj zog Nruab nrab Tsis muaj zog
Li K Ba Ca Na Mg Al Mn Zn Cr Fe Co2+ Ni Sn Pb Fe3+/ Fe H Cu Fe3+/ Fe2+ Hg Ag Hg2+ Pt Au


Mus los ntawm hauv qab mus rau sab saum toj ntawm lub rooj hlau

  • Nce rau hauv reactivity
  • Poob hluav taws xob (oxidize) tau yooj yim dua los ua cov zoo ions
  • Corrode lossis tarnish yooj yim dua
  • Xav tau ntau lub zog (thiab cov qauv sib txawv) cais tawm ntawm cov sib txuas
  • Ua cov neeg sawv cev txo qis dua (cov pab nyiaj hluav taws xob).

Kev tiv thaiv nrog dej thiab kua qaub

Cov hlau cuam tshuam tshaj, xws li sodium, yuav hnov ​​mob nrog dej txias los tsim hydrogen thiab cov hlau hydroxide:

2Na + 2H2O => 2NaOH + H2

Cov hlau nyob hauv nruab nrab ntawm cov txheej txeem reactive, xws li hlau, yuav hnov ​​mob nrog cov kua qaub li sulfuric acid (tab sis tsis muaj dej hauv qhov kub ib txwm) muab hydrogen thiab hlau ntsev, xws li hlau (II) sulfate:

Fe + H.2SO4 => FeSO4 + H2

Kev tsiv tsev nyob ib leeg

Tus ntsia hlau ntsia hlau hauv kev daws tooj liab sulphate tuaj yeem hloov xim sai sai thaum tooj liab yog xim nrog hlau (II) sulphate.

Fe + CuSO4 => Cu + FeSO4

Generally, any of the metals that are lesser in the reactivity series can be replaced by metal: higher metals reduce lower metal ions. This is used for the thermite reaction for the production of small amounts of metallic iron and for the preparation of titanium by kroll process (Ti is approximately the same level as Al in the reactivity series). For instance, iron(III) oxide is decreased into iron and aluminium oxide is converted in this process.

2Al + Fe2O3 -> 2Fe + Al2O3

Zoo li no, qhov kev tshem tawm ntawm titanium los ntawm tetrachloride tuaj yeem ua tiav siv magnesium, uas thaum kawg tsim cov tshuaj magnesium chloride:

2Mg + TiCl4 => Ti + 2MgCl2

Lwm yam, txawm li cas los xij, tuaj rau hauv kev ua si li hlau poov tshuaj tuaj yeem npaj tau los ntawm kev txo qis sodium potassium chloride mus rau 850 ° C. Txawm hais tias sodium hauv cov tshuaj tiv thaiv txheej txheem tsawg dua poov tshuaj, cov tshuaj tiv thaiv tuaj yeem txuas ntxiv txij li cov poov tshuaj tsis haum thiab cov dej sib xyaw.

Na + KCl => K + NaCl

Peb Cov Neeg Txhawb Nqa

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Cov ntawv tshaj tawm cov nyiaj tau los pab peb khaws cov ntsiab lus nrog qhov zoo tshaj plaws vim li cas peb yuav tsum tso adverts? : D

Kuv tsis xav txhawb lub vev xaib (kaw) - :(