Sh. R. Sharipov jdpi kimyo fanlari nomzodi D. K. Muradova
Academic Research in Educational Sciences
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1291-1306
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- Scientific Library of Uzbekistan Academic Research, Uzbekistan 1300 www.ares.uz
Academic Research in Educational Sciences
VOLUME 2 | ISSUE 11 | 2021 ISSN: 2181-1385 Scientific Journal Impact Factor (SJIF) 2021: 5.723 Directory Indexing of International Research Journals-CiteFactor 2020-21: 0.89 DOI: 10.24412/2181-1385-2021-11-1291-1306 Google Scholar Scientific Library of Uzbekistan Academic Research, Uzbekistan 1300 www.ares.uz 1. Probirkaga ozginadan alyuminiy kukuni va maydalangan yod soling. Shisha tayoqcha bilan aralashtiring. Amalda reaksiya sodir bo`lmasligini qayd eting. Probirkaga 1-2 tomchi suv tomizing va uning reaksiya tezligiga qanday ta‘sir etishini kuzating. Alyuminiy va yod o`rtasidagi reaksiya tenglamasini yozing. 2. Ikkita probirka olib, ularning har biriga 2-3 mldan vodorod peroksid eritmasidan quying. Gaz ajralib chiqish tezligiga e‘tibor bering. Probirkalardan biriga ozgina MnO 2 qo`shing. Qanday hodisa kuzatiladi? Reaksiya tezligiga katalizatorning ta‘siri to`g`risidagi o`z xulosangizni yozing. 3. Ikkita probirkaga indigokarmin eritmasidan soling va biriga ikki tomchi FeCl 3 eritmasidan quying. Ikkala probirkada indigokarminning rangsizlanish vaqtini yozib oling. Bajargan ishingizni izohlab bering. 4. Ikkita probirkaning har biriga3 ml dan KCNS eritmasi va uch tomchidan FeCl 3 eritmasidan quying. Bu probirkalarning biriga katalizator simfatida mis (II) sulfat eritmasidan ikki tomchi qo‗shing. So‗ngra ikkala probirkaga Na 2 S 2 O 3 eritmasidan 3 ml dan soling. Har ikkala probirkada rangsizlanish qancha vaqt o‗tganidan keyin kuzatilishini taqqoslab ko‗ring. Natriy tiosulfat temir (III)- rodanidni temir (II) rodanidga qadar qaytaradi, o‗zi esa Na 2 S 4 O 6 ga o‗tadi; reaksiya tenglamasini yozing. 5. Ikkita probirkaga HNO 3 eritmasidan 3 ml dan, Mn(NO 3 ) 2 ning 2% li eritmasidan 2 tomchi soling. Probirkalarning biriga katalizator sifatida ikki tomchi kumush nitrat AgNO 3 eritmasi quying. So‗ngra har ikkala probirkaga ammoniy persulfat (NH 4 ) 2 S 2 O 8 ning 30% li eritmasidan 5 ml dan soling. Ikkala probirkani suv solingan stakanga tushurib qo‗ying. Stakandagi suvni qaynaguncha qizdiring. Probirkalarning qaysi birida avvalroq qizil rang paydo bo‗lishini kuzating. Reaksiyalarning tenglamasi: 2Mn(NO 3 ) 2 + 5(NH 4 )S 2 O 8 +8H 2 O 2HMnO 4 +10NH 4 HSO 4 + 4HNO 3 6. 0,5g quruq NH 4 NO 3 ni probirkada qizdirib suyuqlantiring. So‗ngra suyuq holatdagi ammoniy nitrat ustiga FeCl 3 kristali tashlang. FeCl 3 ning suyuqlantirilgan NH 4 NO 3 da erishini va bu vaqtda ammoniy nitratning parchalanib ketishini kuzatasiz. Reaksiya tenglamasi quyidagidan iborat: 2NH 4 NO 3 N 2 + 4H 2 O + O 2 Shu tajribani katalizator (K 2 Cr 2 O 7 ) ishtirokida takrorlang va tegishli xulosalar chiqaring. 7. Kichikroq kolbaga 15 ml distillangan suv solib, unga 2-3 minut oltingugurt (IV) oksid (SO 2 ) gazi yuboring. Hosil qilingan sulfit kislota (H 2 SO 3 ) eritmasini ikki |
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