Home / Ilm / KISLOTAI BORAT

KISLOTAI BORAT

kislotai-boratKISLOTAI BORAT, kislotai ortoborat, H5BO3, kislotai susti seasosai noorganiki, kristallhoyash berangi pulakchashakl, zichiash 1480 kg/m3, t gud. 169°S (bo tajziya). Dar ob, spirt va dig. halkunandahoi organiki hal meshavad. Hangomi garm kardan obi tarkibashro khorij karda, avval ba kislotai metaborat HBO2, bad ba angidridi borat B2O3 tabdil meyobad. Namakhoi K. b. – boratho asosan hosilai kislotahoi poliborat (formulai umumiashon nB2O3 • mH2)) meboshand. Hangomi tasiri tarafayni K. b. bo spirt, dar ishtiroki kislotai konsentronidani H2SO4 (hamchun payvastkunandai ob), efir hosil meshavad:
3CH3OH + H3BO3 = B(OCH3)3 + 3H2O.
K. b.-ro asosan az borathoi tabii hosil mekunand. K. b. dar sanoat (baroi istehsoli shishahoi makhsus va minoho), tib (vositai ziddi mikrobho), amaliyai laboratori (baroi tayyor namudani mahlulhoi buferi) va g. istifoda meshavad. Mahluli obii 2 – 4%-ai onro baroi obgardon kardani dahon, gulu, shustani chashm kor mefarmoyand. Bo marhami 5 – 10% va zarurai on bemorihoi pustro tabobat menamoyand.

Загрузка...

Dar boramon

Инчунин кобед

hilol

Liseyi “Hilol” dar sh. Dushanbe

Liseyi HILOL yo khud onro niz gimnaziya ham menomand, az solhoi 2000-um faoliyat namuda talabagonro …