б
rV
"5-
о
-с
4,0
4,0
3,0
3,0
2,0
2,0
1,0
о
О 20 40 60 80 100
20
40
60
80
100
H N O
3
konsentratsiyasi, m ass.%
H N O j
konsentratsiyasi,
m ass. %
9. 7-rasm .
A zot k is lo tasin ing suvli e r it m a
larining har xil tem pcratu rala rdagi
qovushqoqligi:
/ - 2 7 3 К da; 2 - 298 К da;
3 —
3 2 3 К da;
4 —
348 К da.
9 .8 -r a sm .
A zot k is lo tasin ing
suvli erit m alarin in g issiqlik
s i g ‘imi.
m a k o ns e n t ra t s i ya s i n i ort ishi b i lan k o ‘p a y i s h i , t e m p e r a t u r a ortishi
b i l an esa k a m a y i s h i k o ‘rsatilgan.
T e m p e r a t u r a n i 348 К d a n 273 К g a c h a k a m a y i s h i va ki sl ot an in g
k o n se n t r a t s i y a s i 6 8 , 4 % H N 0 3 g a c h a ort ishi n at i j a s i da
az ot kislotasi
e r i t m a l a r i n i q o vu s hq o ql i g i o rt is hi , u n d a n keyingi k o n s e n t r a t s i y a l a r
d a esa q o v u s h q o q l i k n i k a ma y i s h i 9 . 7 - r a s m d a k o ‘rsatilgan.
A z o t kislotasi e r i t m a l a r i n i ng issiqlik sigMmlari kislota k o n s e n t r a t
siyasini ort ishi b il an k ama y is hi 9 . 8 - r a s m d a , issiqlik o ‘t k a zuvc ha nl igi
esa t e m p e r a t u r a
ortishi va a k si ncha , azot kislotasining konsent ratsi ya-
si ni ng k a m a y i s h i b i lan o r t a y o t g a n i 9 . 9 - r a s m d a k o ‘rsatilgan. 9. 10-
r a s m da az ot kislotasi e r it ma l ar ini elekt r o ‘tkazuvc hanl igi t e m p e r a t u r a
273 К d a n 303 К g a c h a o r t t i r i l g a n d a a z o t kislotasi
k ons ent ra ts iya si
esa
30% g a c h a o r t g a n d a k o ‘payib, keyingi k o n s e n t r a t s i y a l a r d a esa
k a m a y i b ketishi k o ‘r s a ti lga ndi r. T o z a a z o t kislotasi k a m t u r g ‘un
b o ‘lib, q uy ida gi t e n g l a m a b o ‘y i c h a p a r c h a l a n a d i :
2 H N 0 3 = 2 N 0 2 + 0 , 5 0 , + H 20
(9.1)
Az ot kislotasi qi zd i ri l ga n d a p a r c h a l a n i s h q u yi da gi t e n g l a m a b o ‘-
y i c h a keti shi m u m k i n :
2 H N O j = N 20 3 + 0 2 + H 20
(9.2.)
va 533 К g a yaqin t e m p e r a t u r a d a p a r c h a l a n i s h reaksiyasi t o ‘liq ketib,
t ugal l an ad i.
248