O’zbekiston Respublikasi Oliy va o’rta maxsusta

C(kons-ya)	M	Ro‘rt.	Rx	Χ	λv	α
Kd
1.	0,002nKCl		1000
2.	1nCH3COOH
3.	0,5n
4.	0,25n
5.	0,125n
6.	0,0625n

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Nazorat Savollari

1. Elektrolitik dissotsiatsiyalanishning asosiy sabablari nimada?
2. Dissotsiatsiyalanishning qanday mexanizmlarini bilasiz?
3. Arrenius va Debay-Hyukkel nazariyalarini tushuntiring.
4. Elektrolit eritmalarning termodinamik xossalari qanday ifodalanadi?
5. Elektrolitning o’rtacha aktivlik koeffitsiyenti nima?
6. Dissotsiatsiyalanish darajasi qanday usullarda aniqlanadi?
7. Kislota-asos nazariyalari haqida nimalarni bilasiz?
8. Solishtirma va ekvivalent elektr o’tkazuvchanliklar eritmaning konsentratsiyasiga qanday bog„langan?
9. Birinchi va ikkinchi tur o’tkazgichlar qanday o’tkazgichlar?
8-LABORATORIYA ISHI: GALVANIK ELEMENTLARNING EYUKNI VIRTUAL LABORATORIYA STENDLARIDA ANIQLASH


Ishning maqsadi: Kimyo sanoatida eritmalarning pH qiymatini aniqlash, ulardagi ionlar faolligini o‘lchash, potensiometrik titrlash muhim ahamiyat kasb etadi. Bu usullarning asosida esa elektr yurituvchi kuchni (EYuK) hamda elektrod potеnsiallarini(φ) o‘lchash yotadi.
Kimyoviy reaksiya natijasida elektr energiyasi hosil qiladigan qurilma galvanik element deb ataladi. Bunday asbobda kimyoviy energiya elektr energiyasiga aylanadi. Galvanik elementda o‘ziga xos EYuK paydo bo‘ladi. EYuK elektrolitga tushirilgan metallar tabiatiga, elektrolit konsеntratsiyasiga va haroratga bog‘liq. EYuK metall bilan elektrolit chegarasida hosil bo‘ladigan potеnsiallar farqiga tengdir: E = φ₁ - φ₂.
Laboratoriya ishini bajarish tartibi: elementlarning EyuKni kompen-sasion moslama yordamida o‘lchash mumkin. Moslama, o‘zgarmas elektr toki manbai bo‘lishi uchun 1,8-2,0V kuchlanishli akkumulyatordan va normal Veston elementidan tashkil topgan. Veston elementi doimiy EYuK ga ega (25°C da E=1,0183V), faqat tashqi harorat o‘zgarganda bir muncha o‘zgarishi mumkin.