Sana: -lab. Mashg'uloti. 11-guruh elementlari. Mis va uning birikmalari. ( soat)

Sana: _____________
5-LAB. MASHG'ULOTI. 11-GURUH ELEMENTLARI. MIS VA UNING BIRIKMALARI. ( 4 soat).

Laboratoriya ishining maqsadi: Talabalarni 11 guruhcha elementlar, mis guruhchasi elementlari va ularning birikmalari bilan tanishtirish.


Mis guruhchasi elementlari va ularning birikmalari bo’yicha tajribalar:


Zarur asboblar va reaktivlar: Probirkalar, chinni hovoncha, egilgan shisha naylar, gorelka, shisha tayoqcha, lakmus qog‘ozlari.Kraxmal kleysteri. CuO. Pista ko‘mir. Mis qirindisi. Rux bo‘lakchalari.
Zarur eritmalar: 0,5 n Ca(OH)₂; 2n. CuSO₄; 2n HCl; 2n H₂SO₄; 2n HNO₃; HCl (p=1,19 g/sm³); H₂SO₄kons. (p=1,84 g/sm³); HNO₃ (p=1,4 g/sm³); 2 n NaOH (konsentrik eritma) ; 25 % NH₄OH; 2 n Na₂C0₃; 10% glyukoza; 2 n KI; K₂SO₃(konsentrik eritma) ; 2 n Na₂S₂O₃; 0,05 n AgN0₃; 2 NH₄OH.


1-tajriba. Mis metalini olish.
a) 81-rasmda ko‘rsatilganidek asbob yig‘ing. Mis (II) oksid va pista ko‘mirdan teng miqdorda olib, chinni hovonchada yaxshilab aralashtiring.



81-rasm. Misni qaytarish
Aralashmaning bir qismini probirkaga solib, gaz o‘tkazgich nayni tiqin bilan bekiting. Ikkinchi probirkaga ohakli suv solib, rasmda ko‘rsatilganidek egilgan nayni Cu(OH)₂ solingan probirkadagi eritmaga tushiring. Aralashma solingan probirkani oldin sekin so‘ng 8-10 daqiqa qattiq qizdiring. Ohakli suvning loyqalanishini kuzating. Gorelkani o‘chirmasdan turib ohakli suv solingan probirkani egilgan naydan ajrating so‘ngra gorelka alangasini aralashma solingan probirkadan uzoqlashtiring. Probirka soviganidan so‘ng undagi aralashmani oq qog‘ozga to‘king. Reaksiya natijasida hosil bo‘lgan misni rangidan bilish mumkin. Reaksiya tenglamasini yozing;

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b) probirkaga 8-10 tomchi mis (II) sulfat eritmasidan tomizilib, ustiga kichikroq bir bo‘lak rux metallidan tashlang. Eritmani sekin aralashtirib, rux bo‘lakchasining usti mis bilan qoplanishini kuzating. Reaksiya tenglamasini yozing. Metallarning faollik qatoridan foydalanib, misni mis tuzi eritmalaridan yana qanday metallar bilan siqib chiqarish mumkinligini ko‘rsating.

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Xulosa. ____________________________________________________________________________
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