Yuav ua li cas rau pH Thaum cov kua qaub ntxiv rau alkali?
Yuav ua li cas rau pH Thaum cov kua qaub ntxiv rau alkali?

Video: Yuav ua li cas rau pH Thaum cov kua qaub ntxiv rau alkali?

Video: Yuav ua li cas rau pH Thaum cov kua qaub ntxiv rau alkali?
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Ntxiv dej rau ib kua qaub los yog puag yuav hloov nws pH . Cov kua qaub ua tsawg acidic . Ib yam li ntawd, thaum ib alkali yog diluted nrog dej qhov concentration ntawm OH - ions txo qis. Qhov no ua rau cov pH ntawm alkali kom poob ntawm 7, ua kom cov tshuaj tsawg alkaline raws li dej ntau ntxiv.

Tsis tas li ntawd, nws hu ua dab tsi thaum cov kua qaub reacts nrog alkali?

Ib kua qaub - alkali neutralization yog qhov tshuaj tiv thaiv nruab nrab ntawm hydrogen ions thiab hydroxide ions, tsim dej.

Ib sab saum toj no, tus nqi pH ntawm alkali yog dab tsi? Alkalis yog tag nrho cov Arrhenius bases, uas tsim hydroxide ions (OH) thaum yaj hauv dej. Common khoom ntawm alkaline Cov kev daws teeb meem muaj xws li: Cov kev daws teeb meem nruab nrab (dhau 103 M) muaj a pH ntawm 7.1 los yog ntau dua. Qhov no txhais tau tias lawv yuav tig phenolphthalein los ntawm tsis muaj xim mus rau paj yeeb.

Kuj tseem paub, dab tsi cuam tshuam alkali rau cov kua qaub?

Acids yog ib qhov chaw ntawm hydrogen ions, thiab ntxiv rau lawv dej Ua kom cov concentration ntawm hydrogen ions hauv kev daws, txo cov concentration ntawm hydroxide ions. Rau alkalis, qhov sib txawv yog qhov tseeb: lawv txo cov concentration ntawm hydrogen ions, thaum ua kom cov concentration ntawm hydroxide ions.

Yuav ua li cas thaum lub acid thiab lub hauv paus tuaj ua ke?

Acid - Puag Cov tshuaj tiv thaiv. Thaum ib acid thiab base muab tso rau ua ke , lawv teb rau neutralize lub kua qaub thiab puag khoom, ua ib tug ntsev. Lub H(+) cation ntawm lub kua qaub ua ke nrog OH(-) anion ntawm lub puag tsim dej. Lub compound tsim los ntawm cation ntawm lub puag thiab anion ntawm lub kua qaub hu ua ntsev.

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