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. Uglerodning kimyoviy xossalarini namoyon qiluvchi reaksiya tenglamalarini yozing.
3. 44,8 litr karbonat angidrid hosil qilish uchun (n.sh.) necha g kalsiykarbonatni parchalash lozim?
4. Massasi 39,6 g bo‘lgan magniy va 37,8 g bo‘lgan SiO2 orasidagi reaksiya natijasida hosil bo‘lgan kremniyni eritish uchun massa ulushi 34% bo‘lgan KOH eritmasidan ( ) qanday miqdori talab qilinadi?
II variant
1. Quyidagi qaysi moddalar bilan uglerod (IV)-oksidi reaksiyaga kirishadi, reaksiya tenglamalarini yozing. HNO3NaOH, 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 holida eritish uchun qancha hajm uglerod (IV)-oksidi kerak bo‘ladi?
4. Tarkibi 20 % li bekorchi jinslar bo‘lgan 4,5 gramm toshko‘mir yondirilganda (n.sh.da) necha litr CO2 gazi ajraladi?
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