Mavzu: modda va uning xossalari

MAVZU: KISLOTALAR VA TUZLARNING O'ZARO GENETIK
BOG'LANISHI
21- Laboratoriya ishi: O'YUVCHI NATRIY ERITMASINI XLORID KISLOTA BILAN NEYTRALLASH.
Maqsad: kislotalar asoslar bilan o'zaro ta'sirga kirishib, tuz va suv hosil qilishi natijasida eritma muhitining o'zgarishini o'rganish.
Jihozlar: polipropilen stakan (1), tomchi analizi uchun to'plam (2). probirka (3), pro-birkalar uchun shtativ (4), plastik taglik (5), polipropilen menzurka (6). shisha tavoqcha (7).
R eaktivlar: xlorid kislotaning suyultirilgan eritmasi, natriy ishqori, fenolftalein eritmasi
O'quv-ko'rgazmali qurollar: «Kimyo fanidan proyeksion ko'rgazmali-metodik qollanma-lar»
Jihozlar to'plami
Ishni bajarish tartibi:

1. 
   Probirkaga 2-3 tomchi natriy ishqori eritmasidan tomiziladi, ustiga 1 tomchi fenolftalein eritmasidan tomiziladi.
   
2. 
   O'zgarishi kuzatiladi va izohlanadi.
   
3. 
   Probirkani chayqatib turgan holda, hosil boMgan rang yo'qolgunga qadar xlorid kislota eritmasidan tomchilatib qo'shib boriladi.
   
4. 
   Hodisa izohlanadi va reaksiya tenglamasi yoziladi.
   

Nazorat uchun savollar:

1. 
   Neytrallanish reaksiyalari deb nimaga aytiladi?
   
2. 
   «Kislotali muhit», «ishqoriy muhit» degan iboralarni izohlab bering.
   
3. 
   Teskari reaksiyani amalga oshirish mumkinmi?
   

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