Mavzu: modda va uning xossalari

9-Laboratoriya ishi: KISLOTA ERITMALARINING INDIKATORLARGA TA'SIRI.
Maqsad: kislota eritmalari muhitining indikatorlarga ta'siri vositasida aniqlash va sababini o'rganish.
Jihozlar: shisha stakan (1), plastik taglik (2), probirka (3), plastmassa shpatel (4), shisha tayoqcha (5), pipetka (6), polipropilen stakan 150 ml li (7), polipropilen stakan 50 ml li (8), universal indikator qog'ozi.
Reaktivlar: xlorid kislota va sulfat kislota suyultirilgan eritmasi metil zarg'aldog'i, fenoftalein eritmalari.
O'quv-ko'rgazmali qo'llanmalar: «Kimyo fanidan proyeksion ko'rgazmali-metodik qo'llanmalar», 32-bet.

Jihozlar to'plami universal indikator qog'ozi
Ishni bajarish tartibi:

1. 
   U chta probirkaga xlorid kislota eritmasidan pipetka yordamida 2-3 tomchi solinadi.
   
2. 
   1- probirkaga metil zarg'aldogi, 2- probirkaga fenolftalein eritmasidan 1 tomchi tomiz-iladi, 3-probirkaga universal indikator qo'g'ozi botiriladi.
   

3. 
   Indikatorlar rangining o'zgarishiga e'tibor beriladi.
   
4. 
   Yuqoridagi tajribani sulfat kislota eritmasi bilan ham takrorlanadi va izohlanadi.
   

Nazorat uchun savollar:

1. 
   Kislotalar qanday moddalar hisoblanadi?
   
2. 
   Eng muhim kislotalarga misollar keltiring.
   
3. 
   lndikatorlarning necha xilini bilasiz? Universal indikator nimaligini tushuntiri bering.
   

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________