q o g ‘oz va h .k .) a ra la s h g a n b o ‘lsa , is h q a la n is h yoki
q izd irish v aq tid a k u ch li p o rtla sh g a olib kelishi m um kin .
B a’zi h o lla rd a m arg a n es (IV ) oksidi b a ’zi b ir organik
m o d d a la r b ila n iflo sla n g a n b o ‘lishi m u m k in , sh u n in g
u c h u n ish b o s h la s h d a n o ld in m arg a n es (IV )
o k sid in i
yaxshilab q izd irish kerak.
T o za q u ru q p ro b irk ag a 0,3 g b erto le tu zi so linadi va
sh ta tiv q isq ich iga o ‘rn atila d i. P ro b irk a tu b i dastlab sekin
va
e h tiy o tk o rlik b ilan , so ‘ngra q a ttiq ro q q izd iriladi. Tuz
su y u q la n ib gaz ajralib c h iq a b o s h la g a c h , g azn i sinab
k o ‘rish u c h u n p ro b irk a o g ‘ziga u c h i y allig ‘lan ib
tu rgan
c h o ‘p n i e h tiy o tlik b ila n tu sh irin g . B oshqa b ir to z a q u ru q
p ro b irk a g a 0,3 g ch am asi B ertole tu zi so lin ad i. P ro b irka
s h ta tiv g a o ‘r n a tila d i va tu z m u m k in q a d a r p a s tr o q
te m p e ra tu ra d a su y u q lan tirilad i.
K eyin gaz gorelka chetga
olinib, o ‘sha zahoti probirkaga yaxshi qizdirilgan m arganes
(IV ) o k s id i k u k u n id a n s o lin a d i va p ro b irk a g a u chi
y a llig ia n g a n c h o ‘p tu sh irilad i. (K o ‘zingizga e h tiy o t b o ‘-
ling!). Ik k ala tajrib a d a k islo ro d n in g
ajralib ch iq ish tezligi
ikki xil ekanlig ig a e ’tib o r bering. R eaksiya ten g lam asini
yozing.
9-rasm.
Kislorod olish
42