影响滴定突跃范围的因素

bwin体育appе°Ҹзј–и®Өдёә,еҲҶжһҗеҢ–еӯҰзҹҘиҜҶзӮ№жҳҜйңҖиҰҒж—Ҙз§ҜжңҲзҙҜзҡ„,еҜ№зҹҘиҜҶзӮ№зҡ„жҺҢжҸЎзЁӢеәҰе’ҢеҹәзЎҖж°ҙе№і,еҜ№дәҺиҖғиҜ•дёӯзҡ„иҝҗз”ЁжҳҜеҫҲе…ій”®зҡ„гҖӮдёәдәҶеё®еҠ©еӨ§е®¶еӯҰд№,е°Ҹзј–ж•ҙзҗҶдәҶвҖңгҖҠеҲҶжһҗеҢ–еӯҰгҖӢзҹҘиҜҶзӮ№:ж»ҙ影响滴定突bwin体育app跃范围的因素(edtaжө“еәҰеҜ№зӘҒи·ғиҢғеӣҙзҡ„еҪұе“Қ)3)еҢ–еӯҰи®ЎйҮҸзӮ№еҗҺ,жӣІзәҝз”ұйҷЎзӣҙйҖҗжёҗи¶ӢдәҺе№ізј“,е…¶еҸҳеҢ–и¶ӢеҠҝеҶіе®ҡдәҺж»ҙе®ҡеүӮзҡ„жө“еәҰ4)ж»ҙе®ҡзӘҒи·ғе’Ңж»ҙе®ҡзӘҒи·ғиҢғеӣҙеңЁеҢ–еӯҰи®ЎйҮҸзӮ№йҷ„иҝ‘,йҖҡеёёи®ЎйҮҸзӮ№еүҚеҗҺ+0.1%(ж»ҙе®ҡеҲҶжһҗе…Ғи®ёиҜҜе·®)иҢғеӣҙеҶ…,жә¶ж¶Іжө“еәҰ

еҪұе“Қй…ёзўұж»ҙе®ҡзӘҒи·ғиҢғеӣҙзҡ„еӣзҙжҳҜз”өзҰ»ејәеәҰгҖҒй…ёзўұжө“еәҰгҖӮеҰӮжһңжҳҜејәй…ёж»ҙе®ҡејәзўұпјҢй…ёжө“еәҰи¶ҠеӨ§пјҢж»ҙе®ҡзӘҒи·ғиҢғеӣҙи¶ҠеӨ§пјӣзўұжө“еәҰи¶ҠеӨ§пјҢиҢғеӣҙд№ҹи¶ҠеӨ§гҖӮеҰӮжһңжҳҜејұй…ёж»ҙе®ҡејәзўұпјҢжө“еәҰи¶ҠеӨ§иҢғеӣҙи¶ҠеӨ§гҖӮй…ёзҡ„и§ЈзҰ»

еҪұе“bwin体育appҚй…ёзўұж»ҙе®ҡзӘҒи·ғиҢғеӣҙзҡ„еӣзҙжңүе“Әдәӣзӯ”жЎҲжө“еәҰејұй…ёжҲ–ејұзўұзҡ„з”өзҰ»е№іиЎЎеёёж•°з»“жһңдәҢйўҳзӣ®гҖҗйўҳзӣ®гҖ‘еҪұе“Қй…ёзўұж»ҙе®ҡзӘҒи·ғиҢғеӣҙзҡ„еӣзҙжңүе“Әдәӣзӯ”жЎҲгҖҗи§ЈжһҗгҖ‘жө“еәҰејұй…ёжҲ–ејұзўұзҡ„з”өзҰ»е№іиЎЎеёёж•°

edtaжө“еәҰеҜ№зӘҒи·ғиҢғеӣҙзҡ„еҪұе“Қ

йҖүжӢ©жҢҮзӨәеүӮзҡ„еҺҹеҲҷеӨ§жҰӮжңүиҝҷд№ҲеҮдёӘ.йҰ–е…ҲеңЁеҸҳиүІзӮ№зҡ„йўңиүІеҸҳеҢ–иҰҒжҳҺжҳҫ,иҰҒд№Ҳжңүжө…еҲ°ж·ұ,иҰҒд№Ҳд»Һж—еҲ°жңүпјӣеҸҰдёҖдёӘжҳҜеҸҳиүІзӮ№зҡ„phдёҺеҸҚеә”е®Ңе…Ёж—¶зҡ„phзӣёиҝ‘.ж»ҙе®ҡзӘҒи·ғиҢғеӣҙдёҺжҢҮзӨәеүӮжң¬иә«зҡ„

еңЁEDTAй…ҚдҪҚж»ҙе®ҡдёӯ,дёӢеҲ—жңүе…ій…ёж•Ҳеә”зҡ„еҸҷиҝ°жӯЈзЎ®зҡ„жҳҜAгҖҒй…ёж•Ҳеә”зі»ж•°и¶ҠеӨ§,й…ҚеҗҲзү©зҡ„зЁіе®ҡжҖ§и¶Ҡй«ҳ;BгҖҒеҸҚеә”зҡ„pHеҖји¶ҠеӨ§,EDTAзҡ„й…ёж•Ҳеә”зі»ж•°и¶ҠеӨ§;CгҖҒй…ёж•Ҳеә”зі»ж•°и¶Ҡе°Ҹ,й…ҚеҗҲзү©зҡ„зЁіе®ҡжҖ§и¶Ҡй«ҳ;D

EDTAй…ҚдҪҚж»ҙе®ҡM+Y=MYдёӯ,еңЁжҢҮе®ҡзҡ„з»ҲзӮ№иҜҜе·®иҢғеӣҙеҶ…,дё»еҸҚеә”зҡ„е®ҢжҲҗзЁӢеәҰи¶Ҡй«ҳ,pMвҖҷзҡ„зӘҒи·ғи¶ҠеӨ§гҖӮеҪұе“ҚеҸҚеә”е®ҢжҲҗзЁӢеәҰзҡ„еӣзҙжңү1)жө“еәҰ:иў«жөӢзҰ»еӯҗMд»ҘеҸҠж»ҙе®ҡеүӮEDTAжө“еәҰи¶ҠеӨ§,дё»еҸҚеә”е®ҢжҲҗзЁӢеәҰи¶Ҡй«ҳ,зӘҒи·ғиҢғеӣҙи¶ҠеӨ§2

жө“еәҰе’Ңжё©еәҰеҪұе“Қејәй…ёејәзўұзӣёдә’ж»ҙе®ҡзҡ„pHзӘҒи·ғиҢғеӣҙпјӣжө“еәҰгҖҒжё©еәҰе’Ңй…ёзўұзҡ„ејәеәҰпјҲеҚіKaгҖҒKbзҡ„еӨ§е°ҸпјүеҪұе“Қејұй…ёгҖҒејұзўұж»ҙе®ҡзҡ„pHзӘҒи·ғиҢғеӣҙгҖӮдҫӢеӯҗпјҡеҒҮи®ҫжҳҜй…ёж»ҙе®ҡзўұгҖӮеҰӮжһңжҳҜејәй…ёж»ҙе®ҡ

(1)еҢ–еӯҰи®ЎйҮҸзӮ№еүҚеҗҺВұ0.1%иҢғеӣҙеҶ…pHеҖјзҡ„жҖҘеү§еҸҳеҢ–е°ұз§°дёәй…ёзўұж»ҙе®ҡзӘҒи·ғ,зӘҒи·ғиҝҮзЁӢжүҖеҜ№еә”зҡ„pHиҢғеӣҙз§°дёәзӘҒи·ғиҢғеӣҙгҖӮзӘҒи·ғиҢғеӣҙзҡ„еӨ§е°Ҹе…·жңүйҮҚиҰҒзҡ„е®һйҷ…ж„Ҹд№ү,е®ғжҳҜеҲӨж–ӯй…ёзўұиғҪеҗҰеҮҶ影响滴定突bwin体育app跃范围的因素(edtaжө“еәҰеҜ№зӘҒи·ғиҢғеӣҙзҡ„еҪұе“Қ)еҪұе“bwin体育appҚжҢҮзӨәеүӮеҸҳиүІиҢғеӣҙзҡ„еӣзҙ:жҢҮзӨәеүӮз”ЁйҮҸ:е®ңе°‘дёҚе®ңеӨҡ,еҜ№еҚ•иүІжҢҮзӨәеүӮеҪұе“ҚиҫғеӨ§зҰ»еӯҗејәеәҰ:еҪұе“ҚpKHIn;жё©еәҰ;е…¶д»–17.еҪұе“Қж»ҙе®ҡзӘҒи·ғзҡ„еӣзҙж»ҙе®ҡзӘҒи·ғ:pKa+3пҪһ-lg[Kw/cNaOH