Mavzu: modda va uning xossalari

14-Laboratoriya ishi: NATRIY, KALSIY GIDROKSIDLARINING XOSSALARI BILAN TANISHISH.
Maqsad: suvda eruvchan gidroksidlarni suvda eritish, ularning indikatorlarga ta'siri va issiq­lik hodisalarini kuzatish.
Jihozlar: probirkalar (1), plastmassa shpatel (2), shishaga yozish uchun qalam (3), shisha tayoqcha (4), plastik taglik (5), pipetka (6), raqamli termometr.
Reaktivlar: natriy, kalsiy gidroksidlarining kristallari, temir (Ill)-xlorid, distillangan suv, fenolftalein eritmasi, natriy ishqori eritmasi.
O 'quv-ko'rgazmali qurollar: «Kimyo fanidan proyeksion ko'rgazmali-metodik qo'llanmalar», 66-bet.

Jihozlar to'plami
Raqamli termometr

Ishni bajarish tartibi:

1. 
   Probirkaga pipetka yordamida 3 ml distillangan suv solinadi.
   
2. 
   Termometr bilan probirkadagi suv harorati o'lchanadi.
   
3. 
   Probirkadagi suv ustiga 1-2 dona natriy ishqori kristallari shpatel yordamida solinadi.
   

4. 
   Shisha tayoqcha yordamida aralashtiriladi.
   
5. 
   Eritma harorati raqamli termometr yordamida oichanadi.
   
6. 
   Ustiga 1 tomchi fenolftalein eritmasidan tomiziladi.
   
7. 
   Ishqorning suvda erishi, haroratining o'zgarishi, eritma muhiti haqida xulosa chiqarila
   
8. 
   Laboratoriya tajribalari kalsiy gidroksid Ca(OH)₂ kristallari bilan ham takrorlanadi.
   

Nazorat uchun savollar:

1. 
   Asoslar deb nimalarga aytiladi?
   
2. 
   Asoslarning tasniflanishini tushuntiring.
   
3. 
   Nima uchun suvda eriydigan asoslar ishqorlar deyiladi?
   

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