Κ»Κ»BOSHLANGΚ»ICH DARAJAΚΌΚΌ mavzulashtirilgan testlar toΚ»plami kimyo fanini noldan boshlab oΚ»rganmoqchi boΚ»lgan oΚ»quvchilar uchun eng birinchi ishlashi lozim boΚ»lgan kitoblardan biri hisoblanadi.
Ushbu kitobni uzum marketdan ham olishingiz mumkin
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π2π₯2π1
Quyidagi holatda mis plastinka massasi qanday oΚ»zgaradi?
FeCl3+Cu-->
FeCl3+Cu-->
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50%
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29%
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OΚ»zgarmaydi
Bu savolga javob berishdan oldin reaksiya Γ²zi amalda boradimi yoki yΓ²q aniqlashtirib olish lozimπ¬
Reaksiya boradi va buni ilmiy isbotlash mumkinπ
Fe(3+) β> Fe(2+) 0,77 V
Cu(0) β> Cu(2+) 0,34 V
...ya'ni, Fe(3+) dan Fe(2+) Γ²tishdagi sarflanadigan energiya Cu(0) dan Cu(2+) Γ²tishga sarflanadigan energiyadan yuqori. Natijada Cu(0) Fe(3+) ga nisbatan faol bΓ²lib, qaytaruvchilik vazifasini bajaradi.
2FeCl3 + Cu = 2FeCl2 + CuCl2
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Reaksiya boradi va buni ilmiy isbotlash mumkin
Fe(3+) β> Fe(2+) 0,77 V
Cu(0) β> Cu(2+) 0,34 V
...ya'ni, Fe(3+) dan Fe(2+) Γ²tishdagi sarflanadigan energiya Cu(0) dan Cu(2+) Γ²tishga sarflanadigan energiyadan yuqori. Natijada Cu(0) Fe(3+) ga nisbatan faol bΓ²lib, qaytaruvchilik vazifasini bajaradi.
2FeCl3 + Cu = 2FeCl2 + CuCl2
π§π»βπ» @universal_kimyo
βοΈ (93) 585-17-12
ustozβοΈ Bunyod Raxmanov
kanalπ£ @ChemOfficer
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βοΈ (93) 585-17-12
ustozβοΈ Bunyod Raxmanov
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π3
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RβCH=CH2 yohud =CH2 bilan tugagan alkenlar kuchli oksidlovchi reagentlar ishtirokida oksidlanganda CO2 gacha oksidlanadi. HCOOH oraliq mahsulot bΓ²lib, u yana oksidlanib suv va CO2 ga parchalanadi. Yuqoridagi ingliz manbasida bu aniq aks etgan
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βοΈ MILLIY SERTIFIKATDA BIZNI QANDAY OβZGARISHLAR KUTMOQDA?
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π Rash modeli bekor boβladimi?
π Majburiy fanlar uchun B+ olish kerak boβladimi?
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Hund β inglizcha talaffuzdagi holati va yozilishi
Gund β o'zbekcha talaffuzdagi holati va yozilishi
misol uchun: inglizchadagi "horizontal" va "Harry" ... larni nima deymiz β "gorizontal" va "Garri" ... to'g'rimi?
Demak: Gund deb yozgan va aytgan ma'qul.
(ustoz: Bunyod Raxmanov)
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yuqorida berilgan testlardan qay birining yechimi siz uchun muhimπ
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ππ‘ππ¦ππππ’ππ
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yuqorida berilgan testlardan qay birining yechimi siz uchun muhimπ
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π₯12β€4π1
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yuqorida berilgan testlardan qay birining yechimi siz uchun muhimπ
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Li + HNO3(k) β>β
Laboratoriya tajribasida ko'rganingizga asoslanib, kimyoviy reaksiya(lar) tenglamasini tuzing.
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kanalπ @olympic_uz_ru_en
Laboratoriya tajribasida ko'rganingizga asoslanib, kimyoviy reaksiya(lar) tenglamasini tuzing.
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π₯4π2π2
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πbu lab.tajribasidan maqsad 2 ta bo'lgan:
Li + 2HNO3(k) = LiNO3 + NO2 + H2O
2Li + 2H2O = 2LiOH + H2
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