当用基准物氧化锌标定EDTA溶液时欲使滴定时用去0.1mol／LEDTA25---35ml，问
0.1mol/lEDTA\u7684\u914d\u7f6e\u4e0e\u6807\u5b9a5.\u6807\u51c6\u6eb6\u6db2\u7684\u914d\u7f6e\u548c\u6807\u5b9a
0010g/ml\u9499\u6807\u51c6\u6eb6\u6db2\u7684\u914d\u7f6e\uff1a\u51c6\u786e\u79f0\u53d62.497g\u4e8e105-110\u2103\u5e72\u71e5\u81f3\u6052\u91cd\u7684\u57fa\u51c6\u78b3\u9178\u9499\uff0c\u6eb6\u4e8e40ml\u76d0\u9178\u4e2d\uff0c\u52a0\u70ed\u8d76\u9664\u4e8c\u6c27\u5316\u78b3\uff0c\u51b7\u5374\uff0c\u7528\u6c34\u8f6c\u79fb\u81f31000ml\u5bb9\u91cf\u74f6\u4e2d\uff0c\u7a00\u91ca\u81f3\u523b\u5ea6\u3002
T=0.0004g/mlEDTA\u6807\u51c6\u6ef4\u5b9a\u6eb6\u6db2\u7684\u914d\u7f6e\uff1a\u79f0\u53d63.8EDTA\u4e8c\u94a0\u653e\u5165200ml\u70e7\u676f\u4e2d\u52a0200ml\u6c34\uff0c\u52a0\u70ed\u6eb6\u89e3\u51b7\u5374\u540e\u7528\u6c34\u8f6c\u79fb\u52301000ml\u5bb9\u91cf\u74f6\u4e2d\uff0c\u7a00\u91ca\u81f3\u523b\u5ea6\u3002
EDTA\u6807\u51c6\u6ef4\u5b9a\u6eb6\u6db2\u7684\u6807\u5b9a\uff1a\u51c6\u786e\u5438\u53d6\u9499\u6807\u51c6\u6eb6\u6db210ml\uff0c\u540c\u8bd5\u6837\u6d4b\u5b9a
\u8fdb\u884c\u6ef4\u5b9a\u3002 EDTA\u6ef4\u5b9a\u6eb6\u6db2\u5bf9\u9499\u7684\u6ef4\u5b9a\u5ea6\u4e3a
\u9499\u6807\u51c6\u6eb6\u6db2\u7684\u6d53\u5ea6\u00d7 \u9499\u6807\u51c6\u6eb6\u6db2\u4f53\u79ef/EDTA\u6807\u51c6\u6eb6\u6db2\u7684\u7528\u91cf
EDTA\u6807\u51c6\u6eb6\u6db2\u7684\u6ef4\u5b9a\u82e5\u7528\u6c27\u5316\u950c\u505a\u57fa\u51c6\u7269\u539f\u7406\u4e0e\u8fc7\u7a0b
1\u3001\u539f\u7406\uff1a\u75286mol/LHCl\u6eb6\u89e3\u6c27\u5316\u950c\u57fa\u51c6\u7269\u6210Zn2+\uff0c\u4e0eEDTA\u4ea7\u751f\u914d\u4f4d\u5b9a\u91cf\u53cd\u5e94\u751f\u62101:1\u7684\u87af\u5408\u7269 ZnY2-\uff0c\u4ee5\u6b64\u8fdb\u884c\u7ed3\u679c\u8ba1\u7b97\uff08EDTA\u7684\u51c6\u786e\u6d53\u5ea6\uff09\u3002
2\u3001\u8fc7\u7a0b\uff1a
\uff081\uff09\u6c27\u5316\u950c\u57fa\u51c6\u7269\u8d28\u7684\u5904\u7406\uff1a800\u6444\u6c0f\u5ea6\uff0c\u707c\u70e7\u81f3\u6052\u91cd\uff1b
\uff082\uff09\u51c6\u786e\u79f0\u91cf0.4g\uff0c\u5148\u7528\u6c34\u6da6\u6e7f\uff0c\u518d\u75286mol/LHCl\uff0c10\u6beb\u5347\u6eb6\u89e3\u6c27\u5316\u950c\u57fa\u51c6\u7269\u6210Zn2+\uff0c
\uff083\uff09\u51c6\u786e\u79fb\u5165250ml \u5bb9\u91cf\u74f6\uff0c\u5b9a\u5bb9\u3002
\uff084\uff09\u79fb\u53d625.00ml \u4e8e\u9525\u5f62\u74f6\u91cc\uff0c\u52a0\u7532\u57fa\u7ea21D\uff0c\u6ef4\u52a0\u6c28\u6c34\u81f3\u9ec4\u8272\uff0c\u518d\u52a0\u84b8\u998f\u6c34\u3001\u6c28\u7f13\u51b2\u6eb6\u6db2\u6447\u5300\u540e\uff0c\u52a0\u94ec\u9ed1T \u6307\u793a\u5242 5\u6ef4\uff0c\u7528EDTA\u51c6\u786e\u6eb6\u6db2\u6ef4\u5b9a\uff0c\u6709\u7d2b\u7ea2\u8272\u53d8\u4e3a\u7eaf\u84dd\u8272\uff0c\u5373\u4e3a\u7ec8\u70b9\u3002
绛旓細涓轰簡浣块摤榛慣鎸囩ず鍓傚湪缁堢偣鍙樺寲鏁忛攼锛屾渶濂芥帶鍒禤H鍊煎湪9-10涔嬮棿锛岄渶鍔犳皑姘村拰姘寲閾电紦鍐叉憾娑层
绛旓細涓嶄竴瀹氶潪瑕佺敤浜岀敳閰氭 鍦ㄧ⒈鎬ф潯浠朵笅鐢ㄩ摤榛慣涔熷彲浠ャ傜敤杩欎簺鍋氭寚绀哄墏婊¤冻鍑犱釜鏉′欢 1銆佸畠浠笌閲戝睘绂诲瓙鑳藉舰鎴愮粶鍚堢墿锛屼絾鏄疜绋虫瘮EDTA-R鐨勫皬锛屽洜姝DTA鑳戒粠鎸囩ず鍓備笂澶哄彇閲戝睘绂诲瓙 2銆佹寚绀哄墏鏈韩棰滆壊鍜屽叾閲戝睘缁滃悎鐗╃殑棰滆壊鏈夎叮鏄庢樉鍖哄埆锛岃繖鏍疯兘澶熺湅鍒版槑鏄剧殑婊村畾缁堢偣鍙樺寲锛堝浜岀敳閰氭鏈韩閰告ф潯浠跺憟榛勮壊锛岄噾灞...
绛旓細1. EDTA鏍囧噯婧舵恫锛0.05mol/L锛夌殑閰嶅埗鏂规硶濡備笅锛氬彇19g鐨凟DTA浜岄挔鐩愶紝婧惰В浜庣害300ml鐨勬俯钂搁姘翠腑锛屽緟婧舵恫鍐峰嵈鍚庯紝鍐嶅皢鍏剁█閲婅嚦1L锛屾悈鎷屽潎鍖鍗冲彲寰楀埌鎵闇婧舵恫銆2. 鍦ㄩ厤鍒跺ソ鐨凟DTA鏍囧噯婧舵恫涓紝甯哥敤鐨鍩哄噯鐗鍖呮嫭姘у寲閿锛ZnO锛夈侀攲绮掞紙Zn锛変互鍙婄⒊閰搁挋锛圕aCO3锛夌瓑锛岃繖浜涚墿璐ㄧ敤浜庢爣瀹EDTA婧舵恫銆傚湪姝よ繃绋嬩腑...
绛旓細姘у寲閿鏄浐浣擄紝涓嶈兘涓EDTA閰嶅悎锛屽彧鑳戒互绂诲瓙鎬侀厤鍚堬紝鎵浠ラ渶瑕婧惰ВZnO ZnO+2HCl=ZnCl2+H2O
绛旓細浠ユ哀鍖栭攲涓鍩哄噯鐗╂爣瀹銆傚師鐞嗭細鐢6mol/LHCl婧惰В姘у寲閿屽熀鍑嗙墿鎴怹n2+锛屼笌EDTA浜х敓閰嶄綅瀹氶噺鍙嶅簲鐢熸垚1锛1鐨勮灟鍚堢墿ZnY2-锛屼互姝よ繘琛岀粨鏋滆绠椼涔欎簩鑳哄洓涔欓吀浜岄挔鍙堝彨鍋欵DTA锛屾槸鍖栧涓竴绉嶈壇濂界殑閰嶅悎鍓傦紝瀹冩湁鍏釜閰嶄綅鍘熷瓙锛屽舰鎴愮殑閰嶅悎鐗╁彨鍋氳灟鍚堢墿銆
绛旓細鍥犱负EDTA瀹為檯涓婃槸浣跨敤鍏朵簩閽犵洂褰㈠紡锛屽湪閰嶄綅杩囩▼涓細鏀惧嚭姘㈢瀛愶紝瀵规憾娑茬殑閰稿害鏈夊奖鍝嶏紝鎵浠ヨ浣跨敤缂撳啿鏉ョǔ瀹歱H锛屾槸浣滀负缂撳啿瀛樺湪鐨勩傛憾娑叉槸鐢辫嚦灏戜袱绉嶇墿璐ㄧ粍鎴愮殑鍧囦竴銆佺ǔ瀹氱殑娣峰悎鐗╋紝琚垎鏁ｇ殑鐗╄川锛堟憾璐級浠ュ垎瀛愭垨鏇村皬鐨勮川鐐瑰垎鏁ｄ簬鍙︿竴鐗╄川锛堟憾鍓傦級涓傜墿璐ㄥ湪甯告俯鏃舵湁鍥轰綋銆佹恫浣撳拰姘斾綋涓夌鐘舵併傚洜姝ゆ憾娑蹭篃鏈...
绛旓細edta鐨勯厤鍒朵笌鏍囧畾濡備笅锛欵DTA鏍囧噯婧舵恫锛0.05mol/L锛夌殑閰嶅埗锛氬彇EDTA浜岄挔鐩19g锛屾憾浜庣害300ml娓╄捀棣忔按涓紝鍐峰嵈鍚庣█閲婅嚦1L锛屾憞鍖鍗冲緱銆傚父鐢鍩哄噯鐗㈱nO銆乑n绮掋丆aCO3绛鏍囧畾EDTA鍖粅瀛︽暀|鑲茬綉鎼滈泦鏁寸悊锛岀敤EBT鎴朮O浣滄寚绀哄墏銆傛楠わ細鍙栦簬绾800鈩冪伡鐑ц嚦鎭掗噸鐨勫熀鍑嗘哀鍖栭攲0.12g锛岀簿瀵嗙О瀹氾紝鍔犵█鐩愰吀3ml浣婧惰В...
绛旓細鏍囧畾EDTA鏍囧噯婧舵恫鐨鍩哄噯鐗╄川涓昏鏈夛細绾噾灞為攲銆侀摐銆侀搮锛岀函姘у寲閿銆佹哀鍖栭挋锛屼互鍙婄⒊閰搁挋绛夊寲鍚堢墿銆傚熀鍑嗙墿璐 鍩哄噯鐗╄川(primary standard)鏄垎鏋愬寲瀛︿腑鐢ㄤ簬鐩存帴閰嶅埗鏍囧噯婧舵恫鎴鏍囧畾婊村畾鍒嗘瀽涓搷浣滄憾娑叉祿搴︾殑鐗╄川銆傚熀鍑嗙墿璐ㄧ殑瀹氫箟瓒婃潵瓒婂噯纭紝鍒嗙被鏄庣‘锛屽湪璁稿棰嗗煙鏈夌潃閲嶈鐨勪綔鐢ㄣ傝嚜1906骞寸編鍥芥爣鍑嗗眬(NBS)姝ｅ紡鍒跺...
绛旓細浜岀敳閰氭鏄传鑹茬粨鏅讹紝鏄撴憾浜庢按.瀹冨湪pH>6.3鏃舵樉绾㈣壊,pH锛6.3鏃跺憟榛勮壊銆傝屼簩鐢查厷姗欎笌閲戝睘绂诲瓙鐨勭粶鍚堢墿鍒欐槸绾㈢传鑹茬殑銆傚畠鍙兘鍦╬H锛6.3鏃朵娇鐢ㄣ傝EDTA婊村畾閿岀瀛愮殑鏈浣虫祴璇曟潯浠.PH=5~6锛屾墍浠ヤ互zno涓鍩哄噯鐗鏍囧畾edta婧舵恫锛岃浠ヤ簩鐢查厷姗欎负鎸囩ず鍓 ...
绛旓細鍦ㄩ厤浣嶆淮瀹氫腑锛婊村畾婧娑茬殑PH鍊煎緢閲嶈锛屽惁鍒欓噾灞炵瀛愪笌EDTA褰㈡垚閰嶅悎鐗╃殑绋冲畾鎬т細闄嶄綆锛屽叾浠栭噾灞炵瀛愮殑骞叉壈鎯呭喌涔熶細鍔犲ぇ锛屽洜姝ょ紦鍐叉憾娑蹭竴瀹氳鎸夎姹傚姞鍏ワ紝鐢ㄩ噺涓嶈兘鍑忓皯锛岀◢寰涓浜涙病鍏崇郴銆
