欲配制0.5mol/L的硫酸溶液1000mL,需量取浓硫酸多少毫升?(已知浓硫酸的密度为1.84g/ml,质量分数为96% 如何用密度为1.84g/cm398%的浓硫酸配制0.5mol...
\u5b9e\u9a8c\u5ba4\u91cc\u7528\u6eb6\u8d28\u8d28\u91cf\u5206\u6570\u4e3a98%\u7684\u6d53\u786b\u9178\uff08\u5bc6\u5ea6\u662f1.84g/cm3\uff09\u914d\u52360.5mol/L\u7684\u7a00\u786b\u9178500mL\uff0c\u5b9e\u9a8c\u65f6\u91cf\u53d6\u6d53\u786b\u9178\u5bc6\u5ea6\u662f1.84g/cm3\u3001\u8d28\u91cf\u5206\u6570\u4e3a98%\u7684\u6d53\u786b\u9178\uff0c\u5176\u7269\u8d28\u7684\u91cf\u6d53\u5ea6=1000\u00d71.84\u00d798%98mol/L=18.4mol/L\uff0c\u4ee4\u9700\u8981\u6d53\u786b\u9178\u7684\u4f53\u79ef\u4e3aVmL\uff0c\u6839\u636e\u7a00\u91ca\u5b9a\u5f8b\uff0c\u7a00\u91ca\u524d\u540e\u6eb6\u8d28\u786b\u9178\u7684\u7269\u8d28\u7684\u91cf\u4e0d\u53d8\uff0c\u5219\uff1a18.4mol/L\u00d7V mL=0.5mol/L\u00d7500mL\uff0c\u89e3\u5f97\uff1aV=13.6\uff0c\u7b54\uff1a\u9700\u8981\u8be5\u6d53\u786b\u9178\u7684\u4f53\u79ef\u4e3a13.6mL\uff0e
\uff081\uff09\u8ba1\u7b97\uff1a\u8ba1\u7b97\u914d\u5236\u6240\u9700\u6d53\u786b\u9178\u7684\u4f53\u79ef\u3002
C\uff08H2SO4\uff09=1000*1.84g/cm3*98%/98g/mol=18.4mol/L
\u9700\u8981\u6d53\u786b\u9178\u7684\u4f53\u79ef\uff1d0.5mol/L*0.5L/18.4mol/L=0.0136L=13.6ml
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\u3000\u3000\u6700\u540e\u5c06\u914d\u5236\u597d\u7684\u6eb6\u6db2\u5012\u5165\u8bd5\u5242\u74f6\u4e2d\uff0c\u8d34\u597d\u6807\u7b7e\u3002
可以设未知数列方程计算,利用溶质质量确定等式,见图片吧。
欲配制0.5mol/L的硫酸溶液1
绛旓細姝ラ 1銆 鍑嗗鎵闇璇曞墏锛氭祿鐩愰吀锛37%锛夛紝鍘荤瀛愭按銆2銆 璁$畻鎵闇璇曞墏鐨勯噺銆0銆5mol/L鐨勭洂閰告憾娑诧紝闇瑕佺殑鐩愰吀鐨勬懇灏旀祿搴︿负0銆 5mol/L銆傛牴鎹寲瀛﹁绠楀叕寮忥細C1V1 = C2V2锛屽彲浠ヨ绠楀嚭鎵闇鐨勭洂閰镐綋绉侰1锛氬凡鐭ユ憾娑茬殑娴撳害锛屽崟浣嶄负mol/L V1锛氬凡鐭ユ憾娑茬殑浣撶Н锛屽崟浣嶄负L C2锛氭墍闇婧舵恫...
绛旓細1銆佽绠楁墍闇姘㈡哀鍖栭挔鐨勮川閲忥細姘㈡哀鍖栭挔鐨勫垎瀛愰噺绾︿负40.00g/mol銆傚亣璁鹃渶瑕閰嶅埗1000姣崌鐨勬憾娑诧紝鏍规嵁鎽╁皵娴撳害鍏紡锛屾墍闇姘㈡哀鍖栭挔鐨勬懇灏旀暟=婧舵恫浣撶Н锛圠锛壝楁懇灏旀祿搴︺傚洜姝わ紝鎵闇姘㈡哀鍖栭挔鐨勬懇灏旀暟涓1L脳0.5mol/L=0.5mol銆傛墍闇姘㈡哀鍖栭挔鐨勮川閲=鎵闇姘㈡哀鍖栭挔鐨勬懇灏旀暟脳姘㈡哀鍖栭挔鐨勫垎瀛愰噺=0.5mol脳40...
绛旓細14.6g
绛旓細0.5mol路L^-1脳500ml=0.5mol路L^-1脳0.5L=0.25mol锛0.25mol脳56g路mol^-1=14g锛屽嵆闇瑕佹阿姘у寲閽14鍏
绛旓細锛1锛夐渶姘㈡哀鍖栭挔鐨勮川閲忎负锛0.5L脳0.5mol?L -1 脳40g/mol=10.0g锛涙晠绛旀涓猴細10.0锛涳紙2锛夊ぉ骞崇О閲忛伒寰乏鐗╁彸鐮侊紝鐢卞浘鍙鐑ф澂涓庣牆鐮佺殑浣嶇疆鏀惧弽浜嗭紱鐢卞浘鍙煡锛屾父鐮佺殑璇绘暟涓2.6g锛岀牆鐮佺殑璐ㄩ噺涓10g锛屾牴鎹乏鐩樺唴璐ㄩ噺=鍙崇洏鍐呰川閲+娓哥爜璇绘暟锛岀儳鏉殑瀹為檯璐ㄩ噺涓30g-2.6g=27.4g锛涙晠绛旀涓猴細鐑ф澂...
绛旓細瀵逛簬0.5mol/L鐨勬憾娑诧紝1鍗囦腑闇瑕佺閰哥殑璐ㄩ噺涓0.5脳1脳纭濋吀鐨勬懇灏旇川閲/0.7锛堣川閲忓垎鏁帮級銆備緥濡傦紝濡傛灉纭濋吀鐨勬懇灏旇川閲忎负63鍏/鎽╁皵锛岄偅涔堟墍闇纭濋吀鐨勮川閲忓ぇ绾︽槸45鍏嬶紙63脳0.5/0.7锛夈傚湪閰嶅埗杩囩▼涓紝婧跺墏閫氬父鏄按锛屽嵆浣挎湁鍏朵粬娑蹭綋锛屾按鐨勯噺浼氬喅瀹氬叾浣滀负婧跺墏銆傝嫢娌℃湁姘达紝閲忓鐨勬恫浣撲綔涓烘憾鍓傦紝閲忓皯鐨勪负...
绛旓細瑕閰嶅埗0.5mol/L鐩愰吀婧舵恫1000mL锛岄渶瑕佺煡閬撶洂閰哥殑鎽╁皵璐ㄩ噺鍜屾墍闇鐨勬懇灏旀暟锛岀劧鍚庡啀鏍规嵁鎽╁皵鏁板拰娴撶洂閰告憾娑茬殑鎽╁皵娴撳害璁$畻鎵闇鐨勪綋绉備互涓嬫槸鍏蜂綋姝ラ锛氳绠楃洂閰哥殑鎽╁皵璐ㄩ噺銆傜洂閰革紙HCl锛夌殑鎽╁皵璐ㄩ噺涓36.46 g/mol銆傝绠楁墍闇鐨勬懇灏旀暟銆0.5 mol/L琛ㄧず姣忓崌婧舵恫涓惈鏈0.5鎽╁皵鐨勭洂閰革紝鍥犳1000 mL鐨勬憾娑蹭腑鎵...
绛旓細閰嶅埗100mL0.5mol路L鐨勬隘鍖栭挔婧舵恫鐨勫疄楠屾楠わ細1. 璁$畻锛氶渶瑕佹隘鍖栭挔鐨勮川閲忥紳0.1脳0.5脳58.5锛2.925g 2. 绉伴噺锛氱敤鍒嗘瀽澶╁钩绉伴噺2.925鍏嬫隘鍖栭挔鏀惧叆鐑ф澂涓3. 婧惰В锛氬湪鐑ф澂涓敤100ml钂搁姘翠娇涔嬪畬鍏ㄦ憾瑙o紝骞剁敤鐜荤拑妫掓悈鎷屻4. 杞Щ锛屾礂娑わ細鎶婃憾瑙eソ鐨勬憾娑茬Щ鍏500ml瀹归噺鐡讹紝骞剁敤钂搁姘存礂娑ょ儳鏉拰...
绛旓細瑕閰嶅埗0.5 mol/L鐨勭~閰告憾娑诧紝鍙互鎸変互涓嬫楠よ繘琛岋細1. 灏嗕竴瀹氳川閲忕殑纭吀鍥轰綋绉扮О绉帮紝鍋囪涓簒鍏嬨2. 灏嗙О寰楃殑纭吀鍥轰綋鍔犲叆涓瀹归噺涓1鍗囷紙1000姣崌锛夌殑瀹瑰櫒涓3. 鍔犲叆閫傞噺鐨勫幓绂诲瓙姘达紝鎱㈡參鎼呮媽婧惰В纭吀鍥轰綋锛岀洿鍒版憾娑插潎鍖閫忔槑銆4. 鏈鍚庡姞鍏ヨ冻澶熺殑鍘荤瀛愭按锛屽皢婧舵恫浣撶Н琛ヨ冻鑷1鍗囷紝鍏呭垎娣峰悎銆傞渶瑕佹敞鎰...
绛旓細鐢变簬鏄埗鍙250ml锛屾墍浠ラ渶瑕佺О鍙0.5/4=0.125mol鐨凬aCl NaCl鐨勬懇灏旇川閲忎负58.5g/mol锛圢a23锛孋l35.5锛夛紝鎵浠0.125molNaCl鐨勮川閲忎负58.5*0.125=7.3125g