Qhov txawv ntawm Cawv KOH thiab Aqueous KOH

2024 Tus sau: Alex Aldridge | [email protected]. Kawg hloov kho: 2023-12-17 13:40

Qhov txawv ntawm cawv KOH thiab aqueous KOH yog cov cawv KOH daim ntawv C₂H₅O^- ions thaum aqueous KOH ua OH^{– ions raws li kev sib cais.}

KOH yog potassium hydroxide. Nws yog ib qho inorganic compound peb categorize raws li ib tug ionic compound. Yog li, nws tuaj yeem sib cais ua ob ions li K⁺ ion thiab OH^– ion. Txawm li cas los xij, yog tias KOH nyob hauv cov kua dej cawv, ces qhov kev sib cais muab cov ionic sib txawv. Txij li thaum cawv muaj ethanol molecules (C₂H₅OH), cawv KOH yog ib qho poov tshuaj ethoxide. Yog li, cov tshuaj formula ntawm potassium ethoxide yog C₂H_{5OK. Ntawm qhov tod tes, aqueous KOH tsuas yog KOH hauv dej xwb.}

Alcoholic KOH yog dab tsi?

Alcoholic KOH yog potassium ethoxide. Cov tshuaj formula ntawm potassium ethoxide yog C

2_H5_OK.

Daim duab 01: Potassium Hydroxide

Thaum cov compound no dissociates hauv dej, nws muab C₂H₅O^– ions thiab K⁺ ions. Lub C₂H₅O^{– ions ua lub hauv paus muaj zog. Yog li, cov ions no tuaj yeem paub daws teeb beta hydrogen los ntawm alkyl halides los tsim alkenes. Peb hu cov tshuaj no raws li kev tshem tawm cov tshuaj tiv thaiv, thiab nws yog dehydrohalogenation.}

Cov tshuaj tiv thaiv yog raws li nram no:

C₂H₅OK + C₂H_{5 Cl ⇒ C}2_H4 _{+ C}2_H5 _{OH + KCl}

Aqueous KOH yog dab tsi?

Aqueous KOH yog potassium hydroxide hauv dej. Ntawm no, KOH muaj nyob rau hauv nws daim ntawv dissociated; dissociation ntawm KOH hauv dej ua rau K⁺ ions thiab OH^– ions. Yog li ntawd, aqueous KOH muaj alkaline xwm. Tsis tas li ntawd, OH^{–ion yog ib qho zoo nucleophile. Yog li, nws tuaj yeem hloov pauv cov tshuaj tiv thaiv. Piv txwv li, cov ion no tuaj yeem hloov cov hydrogen atom los ntawm alkyl halide. Cov tshuaj tiv thaiv yog raws li nram no:}

KOH + C₂H₅Cl ⇒ C₂H_{5 OH + KCl}

Qhov txawv ntawm Cawv KOH thiab Aqueous KOH yog dab tsi?

Alcoholic KOH yog potassium ethoxide thaum aqueous KOH yog potassium hydroxide hauv dej. Qhov sib txawv tseem ceeb ntawm cawv KOH thiab aqueous KOH yog cov cawv KOH daim ntawv C

2_H5_O- ^{ions thiab aqueous KOH cov ntawv OH}– ^{ions raws li kev sib cais. Tsis tas li ntawd, cawv KOH cov tebchaw nyiam raug tshem tawm cov tshuaj tiv thaiv, thaum aqueous KOH nyiam kev hloov pauv.}

Cov ntaub ntawv hauv qab no qhia txog qhov sib txawv ntawm cawv KOH thiab aqueous KOH, qhia meej.

Summary – Alcoholic KOH vs Aqueous KOH

KOH lossis potassium hydroxide yog ib qho inorganic compound. Muaj ob hom KOH li cawv KOH thiab aqueous KOH, nyob ntawm seb muaj pes tsawg leeg. Hauv kev xaus, qhov sib txawv tseem ceeb ntawm cawv KOH thiab aqueous KOH yog cov cawv KOH daim ntawv C₂H₅O^{- ions thiab aqueous KOH cov ntawv OH}– ^{ions raws li kev sib cais.}