Vim li cas cov phenol liab tig liab?
Vim li cas cov phenol liab tig liab?

Video: Vim li cas cov phenol liab tig liab?

Video: Vim li cas cov phenol liab tig liab?
Video: Vim li cas thiaj thov Vajtswv 2024, Kaum ib hlis
Anonim

Tshaj pH 8.2, phenol liab tig ib ci liab (fuchsia) xim. thiab yog txiv kab ntxwv- liab . Yog pH yog nce (pKib = 1.2), cov proton los ntawm pawg ketone yog poob, ua rau daj, tsis zoo them ion denoted li HPS.

Yog li, phenol liab qhia li cas?

Phenol liab yog dej-soluble dye siv raws li pH qhia, hloov los ntawm daj kom liab dhau pH 6.6 txog 8.0, thiab tom qab ntawd tig lub ci liab xim saum toj no pH 8.1. Xws li, phenol liab tuaj yeem siv los ua pH qhia dye hauv ntau yam kev kuaj mob thiab kev kuaj mob ntawm tes.

Tsis tas li ntawd, nws txhais li cas thaum phenol liab tig daj? Phenol liab yog pH qhov taw qhia uas yog daj ntawm pH hauv qab 6.8 thiab liab ntawm pH saum toj no 7.4 nrog sib txawv ntxoov los ntawm daj rau liab nruab nrab ntawm cov qib pH. Yog tias qhov ntsuas tau tig daj hauv lub raj mis no txhais tau tias Nws tau dhau los ua paug nrog qee yam uas ua rau pH ntau acidic thiab coj pH qis dua 6.8.

Kuj nug, dab tsi ua rau xim hloov hauv phenol liab?

Cov phenol liab hloov xim thaum koj tshuab rau nws, vim koj tab tom qhia cov pa roj carbon dioxide rau kev sib tov. Phenol liab hloov kom daj nyob rau hauv pH qis dua 7, yog li qhov kev daws teeb meem tig daj yog qhov qhia txog acidic (qis dua 7 pH).

Vim li cas qhov kev daws teeb meem thaum kawg tig liab?

carbon dioxide reacts nrog dej los tsim carbonic acid. Raws li carbonic acid dissociates, lub daws los ua ntau daj, qhia tias pH qis dua. Thaum lub teeb muaj thiab ib tsob nroj ntxiv, lub daws rov qab mus rau nws qhov qub liab xim.

Pom zoo: