Izvi zvinoshandiswa kushandiswa kwezvinyorwa zvekugadzirisa zviri pedyo neutachiona pH
Idzo maitiro matatu ePKa ye phosphoric acid (kubva kuRCC Handbook Chemistry neFizikiki) 2.16, 7.21 uye 12.32. Monosodium phosphate uye nheyo yayo, disodium phosphate inowanzoshandiswa kuunza zviputi zve pH hutsika zvakapoteredza 7, nokuda kwezvinyorwa zvekushandisa, sezvinoratidzwa pano.
Kuita izvi zvinyanyisa kudarika kukugadzira matambudziko eT TAE neTBE. Hazvisi zvakaoma zvikuru, zvakadaro. Zvakawandisa. Inofanira kutora anenge maminitsi gumi kuti irove chikwata ichi. Heino nzira.
1. Sarudza Pfuma Yezvinhu
Usati waita chigadziro, iwe unofanira kutanga watanga kuziva kuti chii chaunoda kuti chive, icho chivako chekuita uye icho chinonzi pH chinoda. Zvizhinji zvizhinji zvinoshandiswa zvakanyanya pakukanda pakati pe 0.1 M uye 10 M. PH inofanira kuva mukati pe1 pH unit ye acid / conjugate base pKa. Kana zviri nyore, iyi samuenzaniso kuverenga ichava ye 1 litre yebhuku.
2. Sarudza Ratio yeAcid kuBeat
Shandisa Henderson-Hasselbalch equation (pasi) kuti uone kuti chiyero chechidimbu chechidimbu chinodikanwa chinotarisirwa kuita chidimbu chepH inoda. Shandisa pKa kukoshesa pf yako yaunoda uye chiyero chichataura kune asidi-base conjugate pair iyo inofanana neyo pKa.
HH Equation: pH = pKa + log ([Base] / [Acid])
Nokuda kwebhuku re pH 6.9, [Base] / [Acid] = 0.4898
Inopa [Acid] uye Solve ye [Base]
Izvo zvaidiwa molarity yemutakiti ndiyo nhamba ye [Acid] + [Base].
Nokuda kwe 1 M buffer, [Base] + [Acid] = 1 uye [Base] = 1 - [Acid]
Nokuisa panzvimbo iyi muchiyero chekuenzanisa, kubva pachitsauko 2, unowana:
[Acid] = 0.6712 moles / L
Sarudza [Acid]
Kushandisa equation: [Base] = 1 - [Acid], unogona kuverenga kuti:
[Base] = 0.3288 makore / L
3. Shandisai Acid uye Conjugate Base
Mushure mokunge makashandisa kuenzanisa kweHenderson-Hasselbalch kuverenga kuti chiyero chechidimbu chechidimbu chinodikanwa chinogadziriswa kuti chigadziriswe, gadzirai pasi pe1 litre yegadzirisheni uchishandisa yakaenzana ye monosodium phosphate uye disodium phosphate.
4. Tarisa pH
Shandisa purogiramu yepH kuti uone kuti pH yakakodzera yegadziri inosvika. Rongedza zvishoma sezvinodiwa, uchishandisa phosphoric acid kana sodium hydroxide (NaOH).
5. Gadzirisa Bhuku
Kana imwe pH yaunoda yasvika, ita kuti ivhu riitwe 1 litre. Zvadaro gadzirisa zvinyorwa sezvaunoda. Izvozvi zvinyorwa zvinogona kuderedzwa kuti zvigadzire zviputi zve 0.5 M, 0.1 M, 0.05 M kana chero chiri pakati.
6. Mazano eBhuku
Yeuka kuti pKa haisi nyore kuyerwa kune zvakakosha kukosha. Zvinhu zvishoma zvakasiyana zvingave zviripo mumabhuku kubva pane zvakasiyana-siyana.
7. Zvaunoda
Kuti uite chigadziro, iwe unoda zvinhu zvitatu, asi izvo zvakasara zvinoshandiswa. Izvo zvinhu zvinonzi monosodium phosphate, disodium phosphate, uye phosphoric acid kana sodium hydroxide kugadzirisa pH.
Iwe uchatodawo pH mamita uye shanduro uye yakakodzera labware. Izvi zvinosanganisira chikwata chinoputika, zvidzidzo zvinopedzisira zvigadziriswa, beakers uye mabhoji.
Pakupedzisira, iwe uchada hotplate inotyisa.