gan b o ‘lad i, ish n i b o sh lash m u m k in .
T a ro z id a ta x m in a n 0,03 g ga yaqin
m ag n iy b o ‘la g id a n y o k i k u k u n id a n
t o r t i b o lin g . P r o b ir k a d a g i t iq i n n i
c h iq arib oling, voro nk ali sh ish a nay ni
y u q o rig a yoki p astg a su rib , b y u re t-
kadagi suv s a th in i n o ld a yoki u n d a n
p a s tr o q d a t o ‘x ta tin g . S u y u ltir ilg a n
sulfat k islotad an 5—6 m l o ‘lchab oling
va u n i k ic h k in a v o ro n k a o rq ali kol-
b a c h a g a q u y in g ( n im a u c h u n ? ) .
K o lb a c h a n in g d ev o rig a k islo ta teg -
m a y d ig a n q ilib m a g n iy l e n t a s i n i
y o p ish tirin g . K o lb a c h an i tiq in bilan
m a h k a m b e r k itin g , b u n d a m a g n iy
le n ta s i k islo ta g a te g m a sin . S o 'n g ra
v o ro n k a n i yu q o rig a va p astg a surib
b y u r e t k a d a g i va v o r o n k a d a g i suv
sathlarini tenglashtiring (nim a uchun?).
Byuretkadagi suv sathini pastki m enisk
b o ‘yicha 0,1 m l aniqlik bilan hisoblang
va yozib q o ‘ying. K o lb a c h an i silkitib m eta lln i kislotaga
tush iring. N im a sodir b o ‘ladi? M etall to 'liq erib b o ‘lgach,
k o lb ach an i uy tem p eratu rasig ach a sovitib, byuretkalardagi
suv s a th in i yozib q o ‘ying. T ajrib a vaqtidagi x o n a te m -
p ^ ra tu ra s i (t)n i va b a ro m e trd a g i b o sim (R ) ni yozib
q o ‘ymg.
Dostları ilə paylaş: