配制9g／L生理盐水250毫升实验步骤 配制9g/l的生理盐水250ml,问需要nac(多少克?
\u914d\u5236\u751f\u7406\u76d0\u6c34\u7684\u6b65\u9aa4\u5404\u79cd\u52a8\u7269\u9700\u7528\u7684\u751f\u7406\u76d0\u6c34\u914d\u7f6e\uff1a
1\u3001\u54fa\u4e73\u7c7b\u9700\u7528\u751f\u7406\u76d0\u6c34\u6d53\u5ea6\u662f0.9%\u3002\u79f0\u53d60.9\u514b\u6c2f\u5316\u94a0\uff0c\u6eb6\u89e3\u5728\u5c11\u91cf\u84b8\u998f\u6c34\u4e2d\uff0c\u7a00\u91ca\u5230100\u6beb\u5347\u3002
2\u3001\u9e1f\u7c7b\u9700\u7528\u7684\u751f\u7406\u76d0\u6c34\u6d53\u5ea6\u662f0.75%\u3002\u79f0\u53d60.75\u514b\u6c2f\u5316\u94a0\uff0c\u6eb6\u89e3\u540e\u7528\u84b8\u998f\u6c34\u7a00\u91ca\u5230100\u6beb\u5347\u3002
3\u3001\u4e24\u6816\u7c7b\u9700\u7528\u7684\u751f\u7406\u76d0\u6c34\u6d53\u5ea6\u662f0.65%\u3002\u79f0\u53d60.65\u514b\u6c2f\u5316\u94a0\uff0c\u6eb6\u89e3\u540e\u7528\u84b8\u998f\u6c34\u7a00\u91ca\u5230100\u6beb\u5347\u3002
\u751f\u7406\u76d0\u6c34\u7684\u4f5c\u7528\uff1a
\u80fd\u591f\u907f\u514d\u7ec6\u80de\u7834\u88c2,\u5b83\u7684\u6e17\u900f\u538b\u548c\u7ec6\u80de\u5916\u7684\u4e00\u6837,\u6240\u4ee5\u4e0d\u4f1a\u8ba9\u7ec6\u80de\u8131\u6c34\u6216\u8005\u8fc7\u5ea6\u5438\u6c34,\u6240\u4ee5\u5404\u79cd\u533b\u7597\u64cd\u4f5c\u4e2d\u9700\u8981\u7528\u6db2\u4f53\u7684\u5730\u65b9\u5f88\u591a\u90fd\u7528\u5b83\u3002
\u6ce8\u610f\u4e8b\u9879\uff1a
1\u3001\u4f7f\u7528\u751f\u7406\u76d0\u6c34\u6e05\u521b\uff1b\u5982\u679c\u4f7f\u7528\u6d17\u5fc5\u6cf0\u6216\u7898\u5236\u5242\uff0c\u8bf7\u7528\u751f\u7406\u76d0\u6c34\u51b2\u6d17\u5e72\u51c0\u3002
2\u3001\u56e0\u4e3a\u4f18\u62d3SSD/\u4f18\u62d3\u6240\u542b\u7684\u6c34\u80f6\u4f1a\u540c\u6a61\u80f6\u7c98\u7740\uff0c\u63a8\u8350\u6362\u836f\u65f6\u5c06\u5916\u79d1\u624b\u5957\u6216\u6362\u836f\u954a\u5b50\u7528\u76d0\u6c34\u6d78\u6e7f\u4e00\u4e0b\uff0c\u53ef\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\u3002
3\u3001\u5c06\u4f18\u62d3SSD\u6216\u4f18\u62d3\u76f4\u63a5\u8986\u76d6\u5728\u4f24\u53e3\u4e0a\uff0c\u53ef\u6839\u636e\u4f24\u53e3\u60c5\u51b5\u8fdb\u884c\u88c1\u526a\uff0c\u8fb9\u7f18\u5e94\u8d85\u51fa\u4f24\u53e3\u5916\u7f183\u5398\u7c73\uff0c\u4fdd\u62a4\u5468\u56f4\u6613\u635f\u76ae\u80a4\u3002\u8bf7\u52ff\u6298\u53e0\u4f7f\u7528\u3002
\u6309\u7167\u300a\u533b\u7597\u62a4\u7406\u6280\u672f\u64cd\u4f5c\u5e38\u89c4\u300b\u7b2c4\u7248\u7b2c259\u9875\u548c\u300a\u57fa\u7840\u62a4\u7406\u5b66\u300b\u7b2c3\u7248\u7b2c174\u9875\u9752\u9709\u7d20\u76ae\u8bd5\u6db2\u914d\u5236\u65b9\u6cd5\uff0c\u6ce8\u5165\u76ae\u5185\u7684\u9752\u9709\u7d20\u76ae\u8bd5\u6db2(0.1ml)\u6d53\u5ea6\u5206\u522b\u4e3a20\u5355\u4f4d\u548c50\u5355\u4f4d\uff0c\u4ee5\u4e0a\u4e24\u79cd\u60c5\u51b5\u5206\u522b\u4ee5\u6bcf\u652f80\u4e07\u5355\u4f4d\u548c40\u4e07\u5355\u4f4d\u7684\u9752\u9709\u7d20\u914d\u5236\u800c\u6210\uff0c\u4f46\u73b0\u5728\u7528\u4e8e\u4e34\u5e8a\u7684\u9752\u9709\u7d20\u591a\u4e3a\u6bcf\u652f160\u4e07\u5355\u4f4d\u3002\u7b14\u8005\u8ba4\u4e3a\uff0c\u7528\u6bcf\u652f160\u4e07\u5355\u4f4d\u7684\u9752\u9709\u7d20\u914d\u5236\u9752\u9709\u7d20\u76ae\u8bd5\u6db2\uff0c\u53ef\u6309\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u7a00\u91ca\uff1a\u53d6\u9752\u9709\u7d20G160\u4e07\u5355\u4f4d\uff0c\u52a0\u751f\u7406\u76d0\u6c344ml\u6eb6\u89e3\uff0c\u6d53\u5ea6\u4e3a\u6bcf\u6beb\u534740\u4e07\u5355\u4f4d\uff0c\u62bd\u51fa0.1ml\uff0c\u52a0\u751f\u7406\u76d0\u6c340.9ml\uff0c\u6d53\u5ea6\u4e3a\u6bcf\u6beb\u53474\u4e07\u5355\u4f4d\uff0c\u62bd\u51fa0.1ml\uff0c\u52a0\u751f\u7406\u76d0\u6c340.9ml\uff0c\u6d53\u5ea6\u4e3a\u6bcf\u6beb\u53474\u5343\u5355\u4f4d\uff0c\u62bd\u51fa0.1ml\uff0c\u52a0\u751f\u7406\u76d0\u6c340.9ml\uff0c\u6d53\u5ea6\u4e3a\u6bcf\u6beb\u5347400\u5355\u4f4d(\u6bcf\u6b21\u7a00\u91ca\u65f6\u5747\u9700\u5c06\u6eb6\u6db2\u6df7\u5408\u5747\u5300)\uff0c\u6ce8\u5165\u76ae\u51850.1ml\u5373\u4e3a40\u5355\u4f4d\uff0c\u6b64\u6d53\u5ea6\u4ecb\u4e8e20\u5355\u4f4d\u548c50\u5355\u4f4d\u4e4b\u95f4\uff0c\u4e14\u65b9\u6cd5\u7b80\u4fbf\u6613\u884c\uff0c\u9002\u5408\u4e8e\u4e34\u5e8a\u3002
计算250mL的水需要多少克盐。计算结果是2.25g盐；
称取2.25g盐在烧杯中溶解；
转移到250mL容量瓶中定容；
摇匀即为9g/L的生理盐水溶液
绛旓細9g/l鐨勭敓鐞嗙洂姘鐨勬笚閫忔祿搴=1000*9*2/58.5=308mmol/L 9g/l鐨勭敓鐞嗙洂姘寸殑娓楅忓帇蟺=cRT=0.308*8.31*298.15=763KPa 娓楅忔祿搴︽槸鐢ㄦ潵姣旇緝婧舵恫娓楅忓帇鍔涚殑,瀹氫箟涓烘笚閫忔椿鎬х墿璐(婧舵恫涓骇鐢熸笚閫忔晥搴旂殑婧惰川绮掑瓙)鐨勭墿璐ㄧ殑閲忛櫎浠ユ憾娑茬殑浣撶Н銆 娓楅忔祿搴 osmotic concentration 娓楅忓帇鐨勫ぇ灏忓喅瀹氫簬鍏ㄦ憾璐ㄧ矑瀛(鍒嗗瓙鍙婄瀛)鐨勬祿搴...
绛旓細瑕閰嶅埗100姣崌璐ㄩ噺娴撳害涓9g/L鐨勭敓鐞嗙洂姘锛岄渶瑕佷娇鐢50g璐ㄩ噺鍒嗘暟涓10%鐨勬隘鍖栭挔婧舵恫锛屽叿浣撴楠ゅ涓嬶細1. 灏50鍏嬫隘鍖栭挔婧惰В鍦100姣崌姘翠腑锛屼娇鍏惰川閲忓垎鏁颁负10锛呫2. 璁＄畻鍑烘憾娑蹭腑鐨勬隘鍖栭挔閲忥細50鍏媥 10锛=5鍏嬫隘鍖栭挔 3. 璁＄畻鍑烘憾娑蹭腑鐨勬按閲忥細100姣崌-5鍏嬫隘鍖栭挔=95姣崌姘 4. 灏95姣崌姘村姞鍏5鍏嬫隘鍖...
绛旓細鍚勭鍔ㄧ墿闇鐢ㄧ殑鐢熺悊鐩愭按閰嶇疆锛1銆佸摵涔崇被闇鐢ㄧ敓鐞嗙洂姘存祿搴︽槸0.9%銆傜О鍙0.9鍏嬫隘鍖栭挔锛屾憾瑙ｅ湪灏戦噺钂搁姘翠腑锛岀█閲婂埌100姣崌銆2銆侀笩绫婚渶鐢ㄧ殑鐢熺悊鐩愭按娴撳害鏄0.75%銆傜О鍙0.75鍏嬫隘鍖栭挔锛屾憾瑙ｅ悗鐢ㄨ捀棣忔按绋閲婂埌100姣崌銆3銆佷袱鏍栫被闇鐢ㄧ殑鐢熺悊鐩愭按娴撳害鏄0.65%銆傜О鍙0.65鍏嬫隘鍖栭挔锛屾憾瑙ｅ悗鐢ㄨ捀棣忔按绋閲婂埌100...
绛旓細鐩存帴璁＄畻灏卞彲浠ヤ簡锛9*0.1=0.9g锛屽嵆绉板彇0.9鍏嬪垎鏋愮函浠ヤ笂鐨勬隘鍖栭挔锛屽姞鍏ヨ捀棣忔按100mL锛屾悈鎷屾憾瑙ｏ紝鍧囧寑鍗冲彲
绛旓細(1)璁＄畻:9*0.5=4.5鍏 (2)绉伴噺:4.5鍏嬫隘鍖栭挔銆(3)婧惰В:鍦ㄧ儳鏉腑婧惰В (4)杞Щ:杞叆500ml瀹归噺鐡朵腑銆(5)娲楁钉:(6)瀹氬:(7)鎽囧寑:
绛旓細0.9g銆備竴鍗囩瓑浜1000姣崌銆傞厤缃1000姣崌婧舵恫闇瑕佷節鍏嬫隘鍖栭挔锛屾墍浠ラ厤缃100姣崌婧舵恫闇瑕0.9鍏嬫隘鍖栭挔銆
绛旓細閰嶆柟涓锛氫换姘鐢熺悊鐩愭按 姘寲閽 6.5鍏 纰抽吀姘㈤挔 0.2鍏 姘寲閽 0.14鍏 纾烽吀浜屾阿閽0.01鍏 姘寲閽 0.12鍏 閰嶆柟浜岋細涔愭皬鐢熺悊鐩愭按 姘寲閽 9.0鍏 纰抽吀姘㈤挔 0.1锝0.3鍏 姘寲閽 0.42鍏 姘寲閽 0.24鍏
绛旓細瑙:姣忔湀鐢熶骇8鎵9g/L鐢熺悊鐩愭按姣忔壒300鐡讹紝姣忕摱500ml銆9g/L锛0.009kg/L锛500ml锛0.5L銆傗憼姣忔湀娑堣桸aCl:8脳300脳0.5脳0.009锛10.8kg鈶¤鐢熺悊鐩愭按娴撳害涓9g/L锛孨aCl婧惰川鐨勭墿璐ㄧ殑閲弉=NaCl婧惰川鐨勮川閲(g)/NaCl婧惰川鐨勬懇灏旇川閲(g/mol)锛9/58.5锛0.15mol锛岃NaCl婧舵恫鐨勭墿璐ㄧ殑閲忔祿搴︼細C锛漬/v锛0...
绛旓細9g鐩愶紝991鍏嬭捀棣忔按锛屼緷娆″姞鍊嶃
绛旓細1銆侀噺娴撳害锛鐢熺悊鐩愭按娴撳害xx%,鎸100姣崌閲岄潰鍚厤鏂圭墿xx鍏嬨2銆佽川閲9g/l?鐪嬩笉鎳傦紝9鍏嬫瘡鍗囷紵锛燂紵鎬庝箞鍙兘锛3銆佷竴鍗囨按鏄1000鍏嬶紝1鍗囩敓鐞嗙洂姘村鏋滄槸xx鍏嬶紝閭ｄ箞鍏舵祿搴﹀氨鏄(xx-1000)/1000x100%銆
