uburyo bwo kugerageza
Izina ryuburyo: hypromellose-kugena itsinda rya hydroxypropoxy-kugena itsinda rya hydroxypropoxy
Igipimo cyo gusaba: Ubu buryo bukoresha uburyo bwa hydroxypropoxy bwo kugena kugirango umenye ibikubiye muri hydroxypropoxy muri hypromellose. Ubu buryo burakoreshwa kuri hypromellose.
Ihame ry'uburyo:Kubaraibikubiye muri hydroxypropoxy mubicuruzwa byipimishije ukurikije uburyo bwo kumenya hydroxypropoxy.
Reagent:
1. 30% (g / g) chromium trioxide igisubizo
Hydroxide
3. Igisubizo cyerekana ibimenyetso bya Fenolphthalein
4. Sodium bicarbonate
5. Koresha aside sulfurike
6. Iyode ya Potasiyumu
7. Sodium thiosulfate titre yumuti (0.02mol / L)
8. Igisubizo cyerekana ibipimo
ibikoresho:
Icyitegererezo:
1. Sodium hydroxide titre yumuti (0.02mol / L)
Gutegura: Fata 5.6mL yumuti wuzuye wa sodium hydroxide wuzuye, ongeramo amazi akonje yatetse mashya kugirango ube 1000mL.
Calibration: Fata hafi 6g ya potasiyumu hydrogen phthalate yumye kuri 105 ° C kugirango uburemere buhoraho, ubipime neza, ongeramo 50mL y'amazi akonje yatetse vuba, uzunguze kugirango ushonga bishoboka; ongeramo ibitonyanga 2 byerekana igisubizo cya fenolphthalein, koresha iyi titre ya Liquid, mugihe wegereye iherezo, potasiyumu hydrogen phthalate igomba gushonga burundu, hanyuma ikitirirwa kugeza igisubizo kibaye umutuku. Buri 1mL ya sodium hydroxide titre yumuti (1mol / L) ihwanye na 20.42mg ya potasiyumu hydrogen phthalate. Kubara ubunini bwiki gisubizo ukurikije ikoreshwa ryiki gisubizo hamwe na potasiyumu hydrogen phthalate yafashwe. Ubwinshi bwinshyi inshuro 5 kugirango intumbero 0.02mol / L.
Ububiko: Shyira mu icupa rya plastike polyethylene hanyuma ugumane kashe; hari ibyobo 2 mumacomeka, hanyuma umuyoboro wikirahure 1 winjizwa muri buri mwobo, umuyoboro 1 uhujwe numuyoboro wa soda, naho umuyoboro 1 ukoreshwa mukunyunyuza amazi.
2. Igisubizo cyerekana Fenolphthalein Fata 1g ya fenolphthalein, ongeramo 100mL ya Ethanol kugirango ushonga
3. Sodium thiosulfate titrasiyo yumuti (0.02mol / L) Gutegura: Fata 26g ya sodium thiosulfate na 0,20g ya karubone ya sodium ya anhydrous, ongeramo urugero rukwiye rwamazi akonje yatetse vuba kugirango ushonga muri 1000mL, uzunguze neza, hanyuma ubishyire muyungurura ukwezi. Calibration: fata hafi 0.15g ya potasiyumu isanzwe ya dichromate yumye kuri 120 ° C hamwe nuburemere buhoraho, uyipime neza, uyishyire mu icupa rya iyode, ongeramo 50mL y'amazi kugirango ushonga, ongeramo 2.0g ya iyode ya potasiyumu, uzunguze buhoro kugirango ushonga, ongeramo 40mL ya acide sulfurike, Shyira neza kandi ushireho ikimenyetso; nyuma yiminota 10 ahantu hijimye, ongeramo 250mL yamazi kugirango uyunguruze, kandi mugihe igisubizo cyitiriwe hafi yumwanya wanyuma, ongeramo 3mL yumuti werekana ibisubizo, komeza titre kugeza ibara ryubururu ryacitse kandi rihinduke icyatsi kibisi, kandi ibisubizo bya titre bikoreshwa nkikosora ryikigereranyo. Buri 1mL ya sodiumi thiosulfate (0.1mol / L) ihwanye na 4.903g ya potasiyumu dichromate. Kubara ubunini bwibisubizo ukurikije ikoreshwa ryumuti nubunini bwa potasiyumu dichromate yafashwe. Ubwinshi bwinshyi inshuro 5 kugirango intumbero 0.02mol / L. Niba ubushyuhe bwicyumba buri hejuru ya 25 ° C, ubushyuhe bwumuti wa reaction hamwe namazi ya dilution bigomba gukonjeshwa kugeza kuri 20 ° C.
4.
Iki gisubizo kigomba gutegurwa gishya mbere yo gukoreshwa.
Intambwe yo gukora: Fata 0.1g yibi bicuruzwa, bipime neza, ubishyire mu icupa rya distillation D, ongeramo 10mL ya 30% (g / g) umuti wa kadmium trichloride. Uzuza umuyoboro utanga ibyuka B n'amazi kumahuriro, hanyuma uhuze igice cya distillation. Shira B na D byombi mu bwogero bwamavuta (birashobora kuba glycerine), kora urwego rwamazi yo kwiyuhagira amavuta rujyanye nurwego rwamazi yumuti wa cadmium trichloride mumacupa D, fungura amazi akonje, nibiba ngombwa, reka uruzi rwa azote rwinjire kandi rugenzure umuvuduko wacyo kugeza kuri bubble 1 kumasegonda. Mu minota 30, uzamure ubushyuhe bwo kwiyuhagira amavuta kugeza kuri 155ºC, hanyuma ukomeze ubu bushyuhe kugeza 50 mL ya distillate yegeranijwe, ukureho umuyoboro wa kondenseri mu nkingi yacitsemo ibice, kwoza amazi, kwoza kandi winjize mu gisubizo cyegeranijwe, ongeramo ibitonyanga 3 byumuti werekana fenolphthalein, hanyuma wandike kuri pH agaciro ka 6.9-7.1 (wapimwe na metero ya acide). na 10mL ya acide sulfurike ya acide, reka ihagarare kugeza igihe nta dioxyde de carbone izongera gukorwa, ongeramo 1.0g ya iyode ya potasiyumu, hanyuma uyifungishe neza, Shyira neza, shyira mu mwijima mu minota 5, ongeramo 1mL yumuti wibimenyetso bya krahisi, witondere hamwe na sodium thiosulfate titrasiyo (0.02mol / L) kugeza ku ndunduro ya V2 (mL). Mu kindi kizamini cyambaye ubusa, andika ingano ya Va na Vb (mL) ya sodium hydroxide yakoreshejwe (0.02mol / L) hamwe na sodium thiosulfate titre (0.02mol / L).
Igihe cyo kohereza: Apr-25-2024