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โค1
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๐ง miyani charxlaymizโ๏ธ
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๐ง miyani charxlaymizโ๏ธ
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โค2๐ฅ1
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๐11โค3
1 M li eritmada (standart sharoit) ionlar soni eng ko'p bo'lgan kislotalarni ajratingโ
Anonymous Quiz
37%
H4P2O7, H3PO4
25%
H2MnO4, H2SO4
15%
HMnO4, HNO3
23%
HI, HBr
๐yuqoridagi test mantiqan chalg'itishga asoslanib, kislota negizi va kislota kuchini solishtirish va anglashni taqozo etadi. Kislota kuchi o'zi nima โ eritmada proton yoki H+ ionlarining erkin mavjud bo'la olish darajasidir. Kislota kuchi faqat o'zidan H+ ni ajratish (dissotsilanish) darajasi bilan o'lchanmaydi, balki qayta anion bilan birikish (assotsilanish) darajasiga ham bog'liq bo'ladi. Assotsilanish darajasi qancha kichik bo'lsa kislotalik kuchi shuncha yuqori bo'ladi. Deylik, solishtirilayotgan kislotalar uchun dissotsilanish darajasi const bo'lsin, demak, kislota kuchi assotsilanishga bog'liq bo'lib qoladi. Assotsilanish o'z navbatida kislota qoldig'ining H atomidan olib qolgan elektronni barqaror holatda o'zida mustaqil saqlay olishiga bog'liq (orbital sig'imi). HI va HBr lar nega eng kuchli kislotalar hisoblanadi, chunki ularda assotsilanish darajasi juda kam va shu tufayli eritmada erkin ionlar salmog'i nisbatan ko'p bo'ladi.
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โค2๐2๐ฅ2
ะะตะฝะธะผัะฐ, ัะบะพัะธะดะฐ ัะฐัะฐะปะณะฐะฝ ะบะธัะปะพัะฐะปะฐั ะบััะธ ะบะฐัะพัะธะดะฐ ั ะฐัะพะปะฐั ะฑะพั. ะกัะปััะฐั ะบะธัะปะพัะฐ ั ะปะพัะธะด ะบะธัะปะพัะฐะดะฐะฝ ะบัััะธะท ะฑัะปะธัะธ ะผัะผะบะธะฝ ัะผะฐั. ัะะฝะธ ัะพะปะธััะธัะธะฝะณ, ััะปััะฐั ะบะธัะปะพัะฐ ะบััะปะธัะพะบ.
(ัะตะฟะตัะธัะพั: ะฅะฅ-ั ััะผะฐั ัะทะฐัะธะดะฐะฝ)
ัะ ะบะธะนะผะฐัะธ ะบะฐะฝัะฐ ะบะธัะธะบ ะฑัะปัะฐ, ะบะธัะปะพัะฐะปะธะบ ะบััะธ ัั ะดะฐัะฐะถะฐะดะฐ ัะบะพัะธ ะฑัะปะฐะดะธ. ะะฐะดะฒะฐะปะดะฐะฝ ะบััะธะฝัะฑะดะธะบะธ, ะะกl H2SO4 ะดะฐะฝ ะฐะฝัะฐ ะบััะปะธ ะบะธัะปะพัะฐ.
pK(H2SO4)=-lgKd=-lg10ยฒ=-2
pK(HCl)=-lgKd=-lg10โท=-7
ะะฐัะปะฐั ะฐัะธะผ, ะพะปะดะธะฝ pKa ะฝะธะผะฐ ัะบะฐะฝะปะธะณะธะฝะธ ััะณะฐะฝะธะฝะณ!
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๐2๐1๐ฅ1
Sizzi javobizzi oladigan bo'lsak C ni nimasi xato?
(repetitor: XX-hurmat yuzasidan)
Tushunaman, รฒzbek tilida berilgan adabiyotlarda aniqlik sayoz, umumlashtirib ketilgan, kuchli kislotalar deyilsa, demak hammasi birday kuchliday tuyuladi. Ammo, asl ilm fanda aniqlik muhim, xatto kuchli kislotalarning รฒz ichida ham รฒta kuchli, รฒrta kuchli, quyi kuchli darajalari bรฒladi. pKa qiymati esa ularni aniq ajratib beradi. Demak, pKa qiymati qancha kichik bรฒlsa, ionlar shu darajada kรฒp degani.
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๐3๐ฅ2๐2โค1
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Maqsad sari kurash yรฒlida avvalo รฒzinga ishon, yiqildingmi qayta oyoqqa tur, kรฒksingdan itarishdimi yana oldinga qadam bos, yรฒlingni tรฒsishdimi tirmashib oshib รฒt va eng asosiysi aslo tรฒxtab qolma!... Shundagina xayot senga istaganingdan ortiฤini beradi!
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๐3๐ฅ1
โMILLIY SERTIFIKATโ
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