Mavzu: modda va uning xossalari

MAVZU: OKSIDLAR, ASOSLAR, KISLOTALAR VA TLZLARNING O'ZARO GENETIK BOG'LANISHI
18-Laboratoriya ishi: SO'NDIRILMAGAN OHAKNING SO'NISHI VA SUV BILAN O'ZARO TA'SIRL
Maqsad: ohakni so'ndirish (suvda eritish) usullarini o'rgatish.
Jihozlar: polipropilen stakan 50 ml (1), pipetka (2), plastik taglik (3), probirkalar uchun shtativ (4), probirka (5), plastmassa shpatel (6), shisha tayoqcha (7), raqamli termometr, avtomatik mikropipetka.
Reaktivlar: so'ndirilmagan ohak (CaO). suv, fenolftaleinning spirtdagi eritmasi.

O'quv-ko'rgazmali qurollar: «Kimyo fanidan proyeksion ko'rgazmali-metodik qoilanma-lar», 55-bet.
Jihozlarto`plami Avtomatik mikropipetka

Ishni bajarish tartibi:
1.50 ml li propilen stakanga teng yarim qilib (25 ml) suv quyiladi va shpatel yordamida unga bir necha dona (5-10 g) so'ndirilmagan ohak - CaO bo'laklari olinadi. 2.Shisha tayoqcha yordamida ehtiyotkorlik bilan aralashtiriladi.
3.So'ndirilmagan ohak suv bilan reaksiyaga kirishib, eritma temperaturasi keskin ko'tarila boshlaydi va «sutli ohak» hosil bo'ladi.

4. 
   «Sutli ohak» tindiriladi.
   
5. 
   «Sutli ohak» eritmasining tiniq qismidan 10ml li probirkaning 1/3 qismiga quyiladi.
   
6. 
   Probirkadagi tiniq suyuqlikka avtomatik mikropipetka yordamida fenolftaleining spirtli eritmasidan 1-2 tomchi tomiziladi.
   
7. 
   Bunda probirkadagi tiniq eritma pushti rangga kirgani kuzatiladi.
   
8. 
   Reaksiya natijasi izohlanib tenglamasi yoziladi.
   

Nazorat uchun savollar:

1. 
   Metall va metallmas oksidlariga ta'rif bering.
   
2. 
   Metall va metallmas oksidlarini suvning ta'siriga qarab qanday nomlash mumkin?
   
3. 
   Hosil bo'lgan moddalarni indikator bilan sinash qanday natija beradi?
   

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