Tekshirdi: _________________________________________ ______________
Laboratoriya ishi № 3
1-tajriba: Oksidlanish-qaytarilish
Reaktivlar: kons-H2SO4, etil spirt, KMnO4 tuzi
Jixozlar: probirka, shtativ, o’lchov silindri, qoshiqcha
Ishning mazmuni: probirkaga 10 ml konsentrlangan sulfat kislota quying. Uning ustiga probirkani qiya qilgan holda, sekinlik bilan 10 ml quying. Hosil bo’lgan aralshma ikki qatlamga ajralib qoladi. Aralshma ustiga ozgina KMnO4 tuzidan soling. Nima kuzatiladi? Reaksiya tenglamalarini yozing.
2-tajriba: Elektroliz
Reaktivlar: CuSO4 eritmasi, distillangan suv, CuCl2, KI eritmasi
Jixozlar: elektrolizni namoyish qilish asbobi, stakan, voronka tomizgich, kolba, shisha tayoqcha
Ishning mazmuni: elektrolizni namoyish qilish asbobiga CuSO4 eritmasidan quying. Va elektr manbaiga ulang. Asbobni ishga tushiring. 2-4 minutdan so’ng reaksiyani to’xtating. Nima kuzatiladi? Reaksiya tenglamalarini yozing. Shu tajribani CuCl2 va KI eritmalari bilan takrorlang. Tokning kuchlanishi 3-4 yoki 10-12 V bo’lishi kerak.
_____________________________________________________________________________________________________________________________________________'>_______________________________________________________________________'>Kuzatilgan natijalar, reaksiya tenglamalari. Xulosa
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