化学中关于氧气的知识点 初中化学制取氧气的重点内容
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\u2460\u8272,\u5473,\u6001:\u65e0\u8272\u65e0\u5473\u6c14\u4f53(\u6807\u51c6\u72b6\u51b5)
\u2461\u7194\u70b9:-218.4\u2103
\u6cb8\u70b9:-182.9\u2103
\u2462\u5bc6\u5ea6:1.429\u514b/\u5347\uff08\u6c14\uff09\uff0c1.419\u514b/\u5398\u7c733\uff08\u6db2\uff09\uff0c1.426\u514b/\u5398\u7c733\uff08\u56fa\uff09
\u2463\u6c34\u6eb6\u6027:\u4e0d\u6613\u6eb6\u4e8e\u6c34
\u2464\u8d2e\u5b58:\u5929\u84dd\u8272\u94a2\u74f6
2.\u5316\u5b66\u6027\u8d28:
\uff081\uff09\u3001\u6c27\u6c14\u8ddf\u91d1\u5c5e\u53cd\u5e94\uff1a
2Mg\uff0bO2\u21922MgO\uff0c\u5267\u70c8\u71c3\u70e7\u53d1\u51fa\u8000\u773c\u7684\u5f3a\u5149\uff0c\u653e\u51fa\u5927\u91cf\u70ed\uff0c\u751f\u6210\u767d\u8272\u56fa\u4f53\u3002
3Fe\uff0b2O2\u2192Fe3O4\uff0c\u7ea2\u70ed\u7684\u94c1\u4e1d\u5267\u70c8\u71c3\u70e7\uff0c\u706b\u661f\u56db\u5c04\uff0c\u653e\u51fa\u5927\u91cf\u70ed\uff0c\u751f\u6210\u9ed1\u8272\u56fa\u4f53\u3002
2Cu\uff0bO2\u21922CuO\uff0c\u52a0\u70ed\u540e\u4eae\u7ea2\u8272\u7684\u94dc\u4e1d\u8868\u9762\u751f\u6210\u4e00\u5c42\u9ed1\u8272\u7269\u8d28\u3002
\uff082\uff09\u3001\u6c27\u6c14\u8ddf\u975e\u91d1\u5c5e\u53cd\u5e94\uff1a
(\u70ad+\u6c27\u6c14\u2192\u4e8c\u6c27\u5316\u78b3)C\uff0bO2\u2192CO2\uff0c\u5267\u70c8\u71c3\u70e7\uff0c\u53d1\u51fa\u767d\u5149\uff0c\u653e\u51fa\u70ed\u91cf\uff0c\u751f\u6210\u4f7f\u77f3\u7070\u6c34\u53d8\u6d51\u6d4a\u7684\u6c14\u4f53\u3002
S\uff0bO2\u2192SO2\uff0c\u53d1\u751f\u660e\u4eae\u7684\u84dd\u7d2b\u8272\u706b\u7130\uff0c\u653e\u51fa\u70ed\u91cf\uff0c\u751f\u6210\u6709\u523a\u6fc0\u6027\u6c14\u5473\u7684\u6c14\u4f53\u3002
4P\uff0b5O2\u21922P2O5\uff0c\u5267\u70c8\u71c3\u70e7\uff0c\u53d1\u51fa\u660e\u4eae\u5149\u8f89\uff0c\u653e\u51fa\u70ed\u91cf\uff0c\u751f\u6210\u767d\u70df\u3002
\uff083\uff09\u3001\u6c27\u6c14\u8ddf\u4e00\u4e9b\u6709\u673a\u7269\u53cd\u5e94\uff0c\u5982\u7532\u70f7\u3001\u4e59\u7094\u3001\u9152\u7cbe\u3001\u77f3\u8721\u7b49\u80fd\u5728\u6c27\u6c14\u4e2d\u71c3\u70e7\u751f\u6210\u6c34\u548c\u4e8c\u6c27\u5316\u78b3\u3002
CH4\uff0b2O2\u21922CO2\uff0b2H2O
2C2H2\uff0b5O2\u21924CO2\uff0b2H2O
\u8003\u70b93\uff0e\u6c27\u6c14\u7684\u5236\u6cd5(\u91cd\u96be\u70b9)
(1)\u5b9e\u9a8c\u5ba4\u5236\u6cd5
\u2460\u539f\u7406\uff1a2KMn04=\u52a0\u70ed= 2K2MnO4+MnO2+O2 \u2191 \uff08a\uff09
2KClO3 =\u52a0\u70ed/MnO2=2KCl+3 O2 \u2191 \uff08b\uff09
2H202 =MnO2=2H20+2O2 \u2191 \uff08c\uff09
\u2461\u53d1\u751f\u88c5\u7f6e\u7684\u9009\u62e9
\u9009\u62e9\u53d1\u751f\u88c5\u7f6e\u7684\u4f9d\u636e\u662f\uff1a\u53cd\u5e94\u7269\u7684\u72b6\u6001\u548c\u53cd\u5e94\u6761\u4ef6\u7b49\u3002\u82e5\u9009\u7528\u539f\u7406(a)\u6216(b)\u7684\u53cd\u5e94\uff0c\u5219\u9009\u7528\u5178\u578b\u7684\u56fa\u4f53\u4e0e\u56fa\u4f53\u53cd\u5e94\u4e14\u9700\u8981\u52a0\u70ed\u578b\u7684\u88c5\u7f6e\u3002
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\u2462\u6536\u96c6\u65b9\u6cd5\u53ca\u68c0\u9a8c\u3001\u9a8c\u6ee1\u3001\u5b58\u653e
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\u6392\u6c34\u6cd5\uff1a\u9002\u7528\u4e8e\u96be\u6eb6\u4e8e\u6c34\u3001\u6216\u4e0d\u6613\u6eb6\u4e8e\u6c34\u3001\u4e14\u4e0d\u4e0e\u6c34\u53d1\u751f\u5316\u5b66\u53cd\u5e94\u7684\u6c14\u4f53\u3002\u6b64\u6cd5\u6536\u96c6\u7684\u6c14\u4f53\u8f83\u4e3a\u7eaf\u51c0\uff0c\u4f46\u542b\u6709\u6c34\u84b8\u6c14\u3002
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\u5411\u4e0b\u6392\u7a7a\u6c14\u6cd5\uff1a\u9002\u7528\u4e8e\u76f8\u540c\u72b6\u51b5\u4e0b\uff0c\u5bc6\u5ea6\u6bd4\u7a7a\u6c14\u5c0f\u4e14\u4e0d\u4e0e\u7a7a\u6c14\u4e2d\u4efb\u4f55\u6210\u5206\u53d1\u751f\u53cd\u5e94\u7684\u6c14\u4f53\u3002\u64cd\u4f5c\u65f6\u5e94\u6ce8\u610f\u5c06\u5bfc\u7ba1\u53e3\u4f38\u5230\u63a5\u8fd1\u96c6\u6c14\u74f6\u5e95\u5904\uff0c\u4fbf\u4e8e\u5c06\u96c6\u6c14\u74f6\u5185\u7684\u7a7a\u6c14\u6392\u5c3d\u3002\u6b64\u6cd5\u6536\u96c6\u7684\u6c14\u4f53\u8f83\u4e3a\u5e72\u71e5\uff0c\u4f46\u7eaf\u5ea6\u8f83\u4f4e\u3002
\u7531\u4e8e\u6c27\u6c14\u4e0d\u6613\u6eb6\u4e8e\u6c34\uff0c\u4e14\u4e0d\u4e0e\u6c34\u53cd\u5e94\uff0c\u6240\u4ee5\u53ef\u4ee5\u7528\u6392\u6c34\u6cd5\u6536\u96c6\uff1b\u53c8\u7531\u4e8e\u6c27\u6c14\u7684\u5bc6\u5ea6\u6bd4\u7a7a\u6c14\u7565\u5927\uff0c\u4e14\u4e0d\u4e0e\u7a7a\u6c14\u4e2d\u4efb\u4f55\u6210\u5206\u53d1\u751f\u53cd\u5e94\uff0c\u56e0\u800c\u8fd8\u53ef\u4ee5\u7528\u5411\u4e0a\u6392\u7a7a\u6c14\u6cd5\u6536\u96c6\u3002\u7528\u6392\u6c34\u6cd5\u6536\u96c6\u7684\u6c27\u6c14\u6bd4\u8f83\u7eaf\u51c0\uff0c\u800c\u7528\u5411\u4e0a\u6392\u7a7a\u6c14\u6cd5\u6536\u96c6\u7684\u6c27\u6c14\u6bd4\u8f83\u5e72\u71e5\u3002
b.\u68c0\u9a8c\uff1a\u5c06\u5e26\u706b\u661f\u7684\u6728\u6761\u4f38\u4eba\u96c6\u6c14\u74f6\u4e2d\uff0c\u82e5\u6728\u6761\u590d\u71c3\uff0c\u8bc1\u660e\u8be5\u6c14\u4f53\u662f\u6c27\u6c14\u3002
c.\u9a8c\u6ee1\u548c\u5b58\u653e\uff1a\u7528\u6392\u6c34\u6cd5\u6536\u96c6\u6c14\u4f53\u65f6\uff0c\u5f53\u6709\u6c14\u6ce1\u4ece\u96c6\u6c14\u74f6\u53e3\u8fb9\u7f18\u5192\u51fa\u65f6\uff0c\u8868\u660e\u6c14\u4f53\u5df2\u6536\u96c6\u6ee1\u3002\u7528\u5411\u4e0a\u6392\u7a7a\u6c14\u6cd5\u6536\u96c6\u6c27\u6c14\u65f6\uff0c\u5c06\u5e26\u706b\u661f\u7684\u6728\u6761\u653e\u5728\u96c6\u6c14\u74f6\u74f6\u53e3\uff0c\u82e5\u6728\u6761\u590d\u71c3\uff0c\u8868\u660e\u6c14\u4f53\u5df2\u6536\u96c6\u6ee1\u3002\u6536\u96c6\u6ee1\u6c27\u6c14\u7684\u96c6\u6c14\u74f6\u8981\u7528\u73bb\u7483\u7247\u76d6\u4f4f\u5e76\u6b63\u653e\u5728\u684c\u9762\u4e0a\u3002
\u2463\u5b9e\u9a8c\u6b65\u9aa4
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\u201c\u606f\u201d\u3002
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绛旓細姘ф皵鐨勬ц川姘ф皵鐨勭墿鐞嗘ц川鍦ㄩ氬父鐘跺喌涓嬶紝姘ф皵鏄棤鑹层佹棤鍛崇殑姘斾綋锛屼笉鏄撴憾浜庢按銆傚湪鏍囧噯鐘跺喌涓嬶紝姘ф皵鐨瀵嗗害鏄1.429g/L锛屾瘮绌烘皵鐨勭暐澶э紝鍦ㄥ帇寮轰负101kpa鏃讹紝姘ф皵鍦-183鈩冩椂鍙樹负娣¤摑鑹叉恫浣擄紝鍦-218鈩冩椂鍙樻垚娣¤摑鑹查洩鑺辩姸...鈥滃厜鈥濄佲滅劙鈥濄佲滈浘鈥濆拰鈥滅儫鈥濈殑鐢ㄦ硶鍏夛細鍥轰綋鐗╄川鐕冪儳鏃跺彂鍏夛紝濡傞搧鏉″湪...
绛旓細涓姘у寲纰冲湪姘ф皵涓噧鐑т骇鐢熻摑鑹茬伀鐒帮紝浜х敓浣挎緞娓呯煶鐏版按鍙樻祽娴婄殑姘斾綋銆鐗╃悊鎬ц川 姘ф皵锛屽寲瀛﹀紡O₂锛岀浉瀵瑰垎瀛愯川閲32锛屾棤鑹叉棤鍛虫皵浣擄紝鏄哀鍏冪礌鏈甯歌鐨勫崟璐ㄥ舰鎬併傜啍鐐-218.4鈩冿紝娌哥偣-183鈩冦備笉鏄撴憾浜庢按锛1L姘翠腑婧惰В绾30mL姘ф皵銆傚湪绌烘皵涓哀姘旂害鍗21%銆備互涓婃槸鎴戞暣鐞嗙殑鍏充簬姘ф皵鎬ц川鐨勭煡璇嗙偣锛屽笇鏈涜兘...
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绛旓細姘ф皵鐨勬ц川鍜岀敤閫斿垵涓寲瀛︾煡璇嗙偣鎬荤粨 1 1銆佹哀姘旂殑鐗╃悊鎬ц川锛氫笉鏄撴憾浜庢按锛屽瘑搴︽瘮绌烘皵鐨勭暐澶с傛恫姘с佸浐鎬佹哀娣¤摑鑹銆2銆佹哀姘旂殑鐢ㄩ旓細姘旂剨銆佽埅澶┿佹綔姘淬佺櫥灞便佸尰鐤椼佹恫姘х偢鑽佺偧閾併佺偧閽 3銆佹哀姘旂殑鍖栧鎬ц川锛氭敮鎸佺噧鐑э紝鏈夊姪鐕冩с傚彲渚涘懠鍚哥敤锛屾槸甯哥敤鐨.姘у寲鍓傘傗懘鏈ㄧ偔鍦ㄦ哀姘斾腑鐕冪儳锛圤2鍙娇甯︾伀鏄熺殑鏈...
绛旓細1銆佹哀姘旀槸涓绉嶅寲瀛︽ц川姣旇緝娲绘臣鐨勬皵浣擄紝鍦ㄤ竴瀹氱殑鏉′欢涓嬶紝鑳戒笌璁稿鐗╄川鍙戠敓鍙嶅簲骞舵斁鍑哄ぇ閲忕殑鐑銆傚湪杩欎簺鍙嶅簲涓紝姘ф皵鎻愪緵姘э紝绉颁负姘у寲鍙嶅簲銆傛哀姘斾究鏄父瑙佺殑姘у寲鍓傦紱鍏锋湁姘у寲鎬с2銆佺墿璐ㄥ湪绾哀姘斾腑鐕冪儳绋嬪害姣旂┖姘斾腑鐕冪儳瑕佸墽鐑堚啋璇存槑鐗╄川鐕冪儳鍓х儓绋嬪害锛屼笌姘ф皵鐨勬祿搴﹀ぇ灏忔垚姝f瘮銆3銆佺墿璐ㄧ噧鐑ф椂鏈夌殑鏈夌伀鐒帮紝鏈...
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绛旓細锛1锛夊崟璐ㄤ笌姘ф皵鐨勫弽搴旓細锛堝寲鍚堝弽搴旓級1锛庨晛鍦ㄦ哀姘斾腑鐕冪儳锛2Mg + O2 鐐圭噧 2MgO 2锛庨搧鍦ㄦ哀姘斾腑鐕冪儳锛3Fe + 2O2 鐐圭噧 Fe3O4 3锛庨摐鍦ㄦ哀姘斾腑鍙楃儹锛2Cu + O2 鍔犵儹 2CuO 4锛庨摑鍦ㄦ哀姘斾腑鐕冪儳锛4Al + 3O2 鐐圭噧 2Al2O3 5锛庢阿姘斿湪姘ф皵涓噧鐑э細2H2 + O2 鐐圭噧 2H2O 6锛庣孩纾峰湪姘ф皵涓噧鐑э紙...
绛旓細2. 鍖栧涓叧浜庢哀姘旂殑鐭ヨ瘑鐐 姘ф皵鏄┖姘旂殑缁勫垎涔嬩竴,鏃犺壊銆佹棤鑷佹棤鍛炽 姘ф皵姣旂┖姘旈噸,鍦ㄦ爣鍑嗙姸鍐(0鈩冨拰澶ф皵鍘嬪己101325甯)涓瀵嗗害涓1.429鍏/鍗,鑳芥憾浜庢按,浣嗘憾瑙e害寰堝皬銆傚湪鍘嬪己涓101kPa鏃,姘ф皵鍦ㄧ害-180鎽勬皬搴︽椂鍙樹负娣¤摑鑹叉恫浣,鍦ㄧ害-218鎽勬皬搴︽椂鍙樻垚闆姳鐘剁殑娣¤摑鑹插浐浣撱 姘ф皵璺熼噾灞炲弽搴 涓庨捑鐨勫弽搴: 4K+...
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绛旓細閫氳繃鍒嗗瓙绛 娴嬪畾绌烘皵涓哀姘斾綋绉垎鏁扮孩纾风噧鐑у疄楠屽師鐞 绾㈢7鍦ㄥ瘑闂鍣ㄤ腑鐕冪儳娴嬪畾绌烘皵涓哀姘旂殑浣撶Н鍒嗘暟 鏂圭▼寮:4P+5O2=鐐圭噧=2P2O5 鐜拌薄:榛勮壊鐏劙 鐧界儫 鏀惧嚭鐑噺 姘存部瀵肩杩涘叆闆嗘皵鐡朵腑鑷崇害浜斿垎涔嬩竴澶勫仠姝 缁撹 姘ф皵绾﹀崰绌烘皵浣撶Н鐨勪簲鍒嗕箣涓(鍘熺悊)(1.姘皵闅炬憾浜庢按 2.姘皵涓嶅彲鐕冧笉鍔╃噧) 鑽搧鐨勯夋嫨:閫夋嫨鑳戒笌绌烘皵涓...