Video: Yuav ua li cas rau pH Thaum cov kua qaub ntxiv rau alkali?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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 10−3 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.
Pom zoo:
Yuav ua li cas yog tias ib qho me me ntawm cov kua qaub ntxiv rau hauv cov tshuaj buffered?
Nws yog tsim los ntawm kev sib xyaw loj ntim ntawm cov kua qaub tsis muaj zog lossis tsis muaj zog nrog nws cov conjugate puag lossis acid. Thaum koj ntxiv me me ntawm cov kua qaub lossis alkali (hauv paus) rau nws, nws cov pH tsis hloov pauv loj. Hauv lwm lo lus, cov tshuaj tsis txwv tsis pub cov kua qaub thiab lub hauv paus los ntawm kev sib xyaw ua ke
Koj puas ntxiv cov kua qaub rau hauv lub hauv paus lossis lub hauv paus rau cov kua qaub?
Ntxiv cov kua qaub ua kom cov concentration ntawm H3O + ions hauv cov tshuaj. Ntxiv ib lub hauv paus txo cov concentration ntawm H3O + ions hauv cov tshuaj. Cov kua qaub thiab lub hauv paus zoo li cov tshuaj tiv thaiv. Yog hais tias lub hauv paus yog ntxiv rau cov kua qaub, cov tshuaj yuav tsis acidic thiab txav mus rau nruab nrab ntawm pH nplai
Yuav ua li cas koj txiav txim siab npaum li cas ntawm cov kua qaub uas yuav tsum tau neutralize lub hauv paus?
Kev daws qhov teeb meem Acid-Base Neutralization Kauj Ruam 1: Muab xam cov moles ntawm OH-. Molarity = moles / ntim. moles = Molarity x Volume. moles OH- = 0.02 M/100 milliliters. Kauj ruam 2: Xam qhov ntim ntawm HCl xav tau. Molarity = moles / ntim. Volume = moles/molarity. Volume = moles H+/0.075 Molarity
Yuav siv cov tshuaj neutralization li cas los nrhiav cov concentration ntawm cov kua qaub?
Ib qho titration yog ib qho kev sim uas siv cov tshuaj tiv thaiv acid-base neutralization los txiav txim qhov tsis paub txog cov kua qaub lossis lub hauv paus. Qhov sib npaug taw tes yog mus txog thaum tus naj npawb ntawm hydrogen ions sib npaug rau tus naj npawb ntawm hydroxide ions
Cov txheej txheem hu ua dab tsi thaum cov kua qaub thiab alkali hnov mob?
Neutralization cuam tshuam nrog cov kua qaub reacting nrog lub hauv paus lossis alkali, tsim cov ntsev thiab dej