Ukumiselwa kweChloride kwiBanga lokuTya iSodium CMC

Ukumiselwa kwekloridi kwibakala lokutya le-sodium carboxymethyl cellulose (CMC) inokuqhutywa kusetyenziswa iindlela ezahlukeneyo zokuhlalutya. Apha, ndiza kuchaza indlela esetyenziswa ngokuqhelekileyo, yindlela yeVolhard, eyaziwa ngokuba yindlela yeMohr. Le ndlela ibandakanya i-titration nge-nitrate yesilivere (i-AgNO3) isisombululo phambi kobukho be-potassium chromate (K2CrO4) isalathisi.

Nantsi inyathelo ngenyathelo inkqubo umiselo chloride ukutya-grade sodium CMC usebenzisa indlela Volhard:

IiMathiriyeli kunye neeReagents:

1. Isampuli ye-sodium carboxymethyl cellulose (CMC).
2. Isisombululo seSilver nitrate (AgNO3) (esisemgangathweni)
3. I-Potassium chromate (K2CrO4) isisombululo sesalathisi
4. I-nitric acid (HNO3) isisombululo (dilute)
5. Mamanzi amisiwe
6. I-0.1 M isisombululo se-sodium chloride (NaCl) (isisombululo esiqhelekileyo)

Izixhobo:

1. Ibhalansi yohlalutyo
2. Iflask yeVolumetric
3. Burette
4. Erlenmeyer iflaski
5. IiPipettes
6. I-Magnetic stirrer
7. imitha ye-pH (ukhetho)

Inkqubo:

1. Ukulinganisa ngokuchanekileyo malunga ne-1 gram yesampulu ye-sodium ye-CMC kwi-flask ecocekileyo neyomileyo ye-250 mL Erlenmeyer.
2. Yongeza malunga ne-100 mL yamanzi adibeneyo kwi-flask kwaye ushukumise de i-CMC inyibilike ngokupheleleyo.
3. Yongeza amaconsi ambalwa esisombululo se-potassium chromate kwi-flask. Isisombululo kufuneka sijike sibe tyheli.
4. Titrate isisombululo ngesisombululo esiqhelekileyo sesilivere ye-nitrate (AgNO3) de kuvele imvula ebomvu-mdaka yesilivere yechromate (Ag2CrO4). Isiphelo siboniswa ngokuqulunqwa kwemvula eqhubekayo ebomvu-obomvu.
5. Rekhoda umthamo wesisombululo se-AgNO3 esisetyenziselwa ukulinganisa.
6. Phinda i-titration kunye neesampuli ezongezelelweyo zesisombululo se-CMC de kube kufunyenwe iziphumo ezihambelanayo (oko kukuthi, imiqulu ye-titration ehambelanayo).
7. Lungiselela ukuzimisela okungenanto usebenzisa amanzi adibeneyo endaweni yesampulu ye-CMC ukuze uphendule nayiphi na i-chloride ekhoyo kwii-reagents okanye i-glassware.
8. Bala umxholo wechloride kwisampulu yesodium yeCMC usebenzisa le fomula ilandelayo:

Apho:

• $�$

  V = umthamo wesisombululo se-AgNO3 esisetyenziselwa i-titration (kwi-mL)

• $�$

  N = ukuqheleka kwesisombululo se-AgNO3 (kwi-mol/L)

• $�$

  M = imolarity yesisombululo esisemgangathweni se-NaCl (kwi-mol/L)

• $�$

  W = ubunzima besampulu ye-sodium CMC (kwi-g)

Qaphela: Imeko
$35.45$

I-35.45 isetyenziselwa ukuguqula umxholo wekloridi ukusuka kwiigram ukuya kwigram ye-chloride ion (
$��-$

Cl−).

Ukulumkela:

1. Phatha yonke imichiza ngononophelo kwaye unxibe izixhobo ezifanelekileyo zokuzikhusela.
2. Qinisekisa ukuba zonke izinto zeglasi zicocekile kwaye zomile ukuthintela ungcoliseko.
3. Ukulinganisa isisombululo se-nitrate yesilivere usebenzisa umgangatho wokuqala onjengesisombululo se-sodium chloride (NaCl).
4. Yenza ititration kancinane kufutshane nesiphelo ukuze uqinisekise iziphumo ezichanekileyo.
5. Sebenzisa i-magnetic stirrer ukuqinisekisa ukuxutywa ngokucokisekileyo kwezisombululo ngexesha lokulinganisa.
6. Phinda ubhale i-titration ukuqinisekisa ukuchaneka nokuchaneka kweziphumo.

Ngokulandela le nkqubo, unokumisela umxholo we-chloride kwibakala lokutya le-sodium carboxymethyl cellulose (CMC) ngokuchanekileyo nangokuthembeka, ukuqinisekisa ukuthotyelwa kwemigangatho yomgangatho kunye neemfuno zokulawula ezongezo zokutya.