L a b a r a t o r I y a

Sana________________ NAZORAT ISHI -2
I variant
1. Ohakli suv orqali uglerod (IV)-oksid mo'l o'tkazilganda, dastlab ohakli
suv loyqalanadi, so'ngra loyqalanish yo'qolib, tiniq eritma hosil bo'ladi. Bu
o'zgarishlar natijasida sodir bo'lgan reaksiya tenglamalarni yozing.
2. Ugierodning kimyoviy xossalarini namoyon qiiuvchi reaksiya
tenglamalarini yozing.
3. 44,8 litr karbonat angidrid hosil qilish uchun (n.sh.) necha g kalsiy
karbonatni parchalash lozim?
4. Quyidagi oksidlanish-qaytarilish reaksiya tenglamalariga koeffitsi-yentiar tanlang va oksidiovchi hamda qaytaruvchini aniqlang.
A)C+H₂SO₄=CO₂+SO₂+H₂O; B)H₂O+ Si + NaOH = Na₄SiO₃ + H₂
II variant
1 . Quyidagi qaysi moddalar biian uglerod (IV)-oksidi reaksiyaga kirishadi, reaksiya tengiamalarini yozing.
HN0₃ NaOH, KCI, SO₃ Na₂O, H₂SO₄, Ca(OH)₂, K₂O.
2. Kremniyning kimyoviy xossalarini namoyon qiluvchi reaksiya
tenglamalarini yozing.

3. 
   10 g kalsiy karbonati bor bo'lgan suspenziyani gidrokorbonat hoiida
   eritish uchurt qancha hajm ugierod (IV)-oksidi kerak bo'ladi?
   
4. 
   Quyidagi oksidlanish-qaytarilish reaksiya tenglamalariga koeffitsi-
   yentlar tanlang va oksidiovchi hamda qaytaruvchini aniqlang.
   

A) C + HNO₃ = C0₂ + NO₂ + H₂O; B) SiCI₄ + NaOH = Na₄SiO₄ + NaCI + H₂O.
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