Mavzu: modda va uning xossalari

II. Parchalanish reaksiyasi (malaxitning parchalanishi).

1. 
   Probirkaga malaxit deb ataluvchi yashil rangli moddadan solib, probirka og'zi nayli tiqin bilan berkitiladi.
   

2. 
   Probirka probirka qizdirgichga o'rnatiladi va qizdiriladi.
   
3. 
   Nay uchi birinchi tajribadan hosil bo'lgan tiniq eritmaga tushiriladi.
   
4. 
   Probirka tubida vashil rangli modda o'rnida qora rangli (mis (Il)-oksidi) kukuni hosi bo'ladi va probirka ichki devorlarida suv tomchilari hosil bo'lganligi hamda 2- prd birkada tiniq eritma loyqalanganligi kuzatiladi.
   
5. 
   Qizdirilayotgan probirka og'ziga yonib turgan ingichka cho'p kiritilsa, cho'p alangas o'chib qoladi va bu reaksiya natijasida karbonat angidrid C0₂ gazi hosil bo'lganligin bilish mumkin.
   
6. 
   Tajriba izohlanadi va daftarga yozib olinadi.
   

III. O'rin olish reaksiyasi:

1. 
   Planshetga mis (II )-xlorid eritmasidan pipetka yordamida 2 tomchi quyiladi.
   
2. 
   Tozalangan yaltiroq temir granulasi bu eritmaga tushiriladi.
   
3. 
   2-3 minut o'tgach, temir sirti qizg'ish, mis qoplami bilan qoplanganligi kuzatiladi.
   

1. 
   Planshetdagi eritma rangining o'zgarishiga e'tibor beriladi, reaksiya tenglamasi daftarg* yoziladi.
   

Nazorat uchun savollar:

1. 
   Kimyoviy reaksiya turlarini sanab bering. 2. Birikish va ajralish reaksiyalariga ta'rif bering.
   

3. O'rin olish va almashinish reaksiyalariga ta'rif bering.
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________