Qaababka tijaabada ah
Qaabka Qaabka: Go'aaminta Hypromellose-Go'aaminta Hydroxypropoxy Kooxda Group-Go'aaminta Kooxda Hydroxyproxy Group
Baaxadda Codsiga: Qaabkan wuxuu adeegsadaa habka go'aan ka gaarista hydroxyproxyproboxy si loo go'aamiyo waxa ku jira hydroxyproboxy ee hypromellose. Qaabkan ayaa lagu dabaqi karaa hypromellose.
Mabda'a dariiqa:XisaabiWaxyaabaha ku jira hydroxyphoxy ee sheyga baaritaanka iyadoo loo eegayo habka go'aan qaadashada hydroxyproboxy-ka.
Reagent:
1. 30% (G / G) Xalka chromium triomide
2. Hydroxide
3. Xalka tilmaamaha Phenolphthalein
4. Sodium bicarbonate
5. Diluttic acid
6. Potassium-ka idide
7. Sodium thiusulfate xalka xalka (0.02mol / L)
8. Xalka tufaax ee istaarch
Qalabka:
Diyaarinta Muunada:
1. Sodium Hydroxide xalka xalka ah (0.02mol / L)
Diyaarinta: Qaado 5.6ml oo ah xalka nasashada ee buufiyeeska ah ee Stondroxide, ku dar biyo qabow qabow si aad u sameyso 1000ml.
Qalliinka: qaado qiyaastii 6g oo ah hydrogen-ka caadiga ah phthalate oo la qalajiyey 105 ° C oo si joogto ah u miiqin, isku miisaaman, ku dar 50ml oo biyo nadiif ah oo la kariyey, rux si aad u baabi'iso intii suurtagal ah; Ku dar 2 dhibcood oo ah tilmaamaha tilmaamaha ee phenolphthalein xalka, isticmaal daadadan dareeraha ah, markaad u dhawaato meesha ugu dambeysa, hydrogen-ka potassium hydratate waa in si buuxda loo kala diraa, lana tirtiraa ilaa xalka casaanku casaan noqdo. 1ml kasta oo ah sodium hydroxide xalka xalka ah (1mol / L) waxay u dhigantaa 20.42mg oo ah potassium hydrogen phthadate. Xisaabi uruurinta xalkaan ee ku saleysan isticmaalka xalkan iyo xaddiga hay'ada potassium hydrogen phthastate. Tiro-tiro ahaan 5 jeer si loo sameeyo uruurinta 0.02mol / L.
Kaydinta: ku rid dhalo caag ah oo polyetylen oo xir xir; Waxaa jira 2 godad gudaha, iyo 1 tubo galaas ah ayaa la galiya dalool kasta, 1 tubo ayaa lagu xidhaa tuubbada soda, iyo 1 tubo ayaa loo isticmaalaa nuugista dareeraha.
2. Tilmaamaha tilmaamaha phenolphthalein xalka 1g ee phenolphthalein, ku dar 100ml of ethanol si uu u milmo
3. Sodium thiosulfate titration solution (0.02mol/L) Preparation: Take 26g of sodium thiosulfate and 0.20g of anhydrous sodium carbonate, add an appropriate amount of freshly boiled cold water to dissolve into 1000mL, shake well, and place it for 1 month miiraha. Qalliinka: Qaado qiyaastii 0.15g oo ah 0.15g oo ah potassium potassium-ka caadiga ah oo la qalajiyey 120 ° C miisaan joogto ah, oo si sax ah u miisaaman dhalada Iodine, ku dar 12ml oo biyo ah oo ah potassium-ka, si tartiib ah u kala saar 40ml oo ah milat acid, si fiican u rux oo si adag u xir; 10 daqiiqo ka dib meel mugdi ah, ku dar biyo 250ml oo biyo ah si aad u milatato, iyo goorta xalka lagu xidho meesha ugu dambeysa, ku sii wad shatration-ka illaa midabka buluuga ah uu ka dhammaado oo cagaaran yahay cagaar, iyo natiijada cagaaran. waxaa loo isticmaalaa sidii sixitaanka tijaabada madhan. Mid kasta oo ka mid ah 1ml oo ah sodium thisusulfate (0.1mol / L) waxay u dhigantaa 4.903g oo ah potassium dichromate. Xisaabi uruurinta xalka iyadoo loo eegayo isticmaalka xalka iyo qadarka potassium dictomate. Tiro-tiro ahaan 5 jeer si loo sameeyo uruurinta 0.02mol / L. Haddii heerkulka qolka uu ka sarreeyo 25 ° C, heerkulka xalka falcelinta iyo biyaha dillaaca waa in la qaboojiyaa illaa 20 ° C.
4. Tilmaanta tilmaamaha ee istaarch Xal u qaad 0.5g oo ah istaarijka milmileyda, ku dar 5ml oo biyo ah oo si fiican u walaaq, si tartiib ah u karkaraya 100ml biyo ah, sii wad inaad karkariyo 2 daqiiqo, ha qaboojiso, Oo waa diyaar.
Xalkan waa inuu ahaadaa mid la diyaariyo ka hor isticmaalka.
Tallaabooyinka Howlgalka: Qaado 0.1g ee sheygan, miisaanka si sax ah, ku rid dhalada muxaadaroodka d, ku dar 10ml oo ah 30ml oo ah 30% (G / G) Xalka Trachloride Tricloride. Buuxi tubbada samafalka ee tubbada B oo biyo ku dheji wadajirka, oo ku xir qaybta musiibada. Ku saabashka b iyo d qubeyska saliida (waxay noqon kartaa glycerin), ka dhig heerka dareeraha ee qubayska saliida oo la jaan qaadaya heerka dareeraha ah ee xalka cambaarka ee dhalada d, dami, haddii loo baahdo, ha qulqulka wadnaha ee loo yaqaan 'nitrogen durdurku uu socdo oo uu ku xakameeyo heerka qulqulka 1 xumbo daqiiqaddiiba. 30 daqiiqo gudahood, kor u qaad heerkulka qubeyska illaa 155ºC, oo ay si joogto ah heerkulkan ugu soo ururiyaan safka jajabka, ku mayr biyo, ku maydh oo ku dar xalka aruurinta, ku dar 3 dhibcaha loo yaqaan 'phenolphthalin' xalka tilmaamaha, oo tigidhada qiimaha pH-da waa 6.9-7.1.1 (oo lagu cabiray mitirka aashitada), ka dibna ku dar 0.5g ee sodium bicarbonate iyo 10ml oo ah sullufic acid, ha u istaago Ilaa inta aan laga soo saarin kaarboon-kaarboon-ka, ku dar 1.0g ee potassium, oo xir si fiican, ku rid mugdiga 5ml oo ah xalka tilmaamaha ee istaarch thisulfate xalka xalka ah (0.02mol / L) Qodobka ugu dambeeya, duub mugga qiimaha v2 (ml). Imtixaan kale oo maran, ku diiwaan geli tusaca VA iyo VB (ML) ee sodium hydroxide xalka xalka hay'adda ee Hydroxide (0.02mol / L) iyo LOUM) iyo Sodiummol / L Dayax-darooga
Waqtiga Post: Apr-25-2024