Mavzu: modda va uning xossalari

20-Laboratoriya ishi: NATRIY GIDROKARBONATNI QIZDIRISH YO'LI BILAN PARCHALASH.
Maqsad: murakkab moddalarning harorat (qizdirish) yordamida parchalanishini o'rganish.
Jihozlar: polipropilen stakan 50 ml (1), plastmassa shpatel (2), shisha tayoqcha (3), plastik taglik (4), pipetka (5), polipropilen stakan 150 ml (6), shisha stakan (7), probirka (8), elektron tarozi (10), probirka qizdirgich, laboratoriya shtativi, rezina nay, rezina tiqinli gaz o'tkazish nayi.
Reaktivlar: natriy gidrokarbonat NaHC0₃, kalsiy gidroksid Ca(OH)₂ eritmasi.
O'quv-ko'rgazmali qurollar: «Kimyo fanidan proyektsion ко'rgazmali-metodik qo'llanmalar»
Ishni bajarish tartibi:

1. 
   Probirkaga natriy gidrokarbonat NaHCO_: (oq kukumdan elekrron tarozida 2-3g tor-tib olinadi.
   

1. 
   Probirka og'zi nayli tiqin bilan berkitiladi va probirka qizdirgichga o'rnatilib qizdiriladi.
   
2. 
   Ikkinchi probirkaga kalsiy gidroksid Ca(OH), eritmasidan quyiladi.
   
3. 
   Naychaning uchi kalsiy gidroksid Ca(OH), eritmasi solingan probirkaga solinadi.
   
4. 
   Qizdirilayotgan probirka devorlarida suv tomchilari hosil boiganligi kuzatiladi.
   
5. 
   Bu hodisa reaksiya natijasida karbonat angidrid gazi hosil bolishi kuzatiladi.
   
6. 
   Tajriba natijasi izohlanib, reaksiya tenglamasi yoziladi.
   

Nazorat uchun savollar:

1. 
   Murakkab modda-natriy gidrokarbonat parchalanishida gaz modda CO, karbonat angidrid hosil bo'ladi. Buni qanday sinash mumkin?
   

1. 
   Probirka devorlarida suv tomchilarining hosil bo'lishi nimani anglatadi?
   
2. 
   Teskari reaksiyani amalga oshirish mumkinmi?
   

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