现有95%乙醇250ml，要配制70%乙醇需加入蒸馏水多少ml 现有95%乙醇500ml要配制70%乙醇需要加入灭菌蒸馏水约...
\u73b0\u670995%\u4e59\u9187500ml\uff0c\u8981\u914d\u7f6e70%\u4e59\u9187\uff0c\u9700\u8981\u52a0\u5165\uff0c\u706d\u83cc\u84b8\u998f\u6c34\u7ea6\uff1f A132ml B179ml\u9700\u8981\u52a0\u5165\u706d\u83cc\u998f\u6c34\uff1a178.6ml\u3002
\u89e3\uff1a\u8bbe\u9700\u52a0\u5165\u6c34\u7684\u8d28\u91cf\u4e3ax
95%\u00d7500g\uff1d\ufe59500g\uff0bx\ufe5a\u00d770\uff05
475g\uff1d350g\uff0b0.7x
0.7x\uff1d125g
x\u2248178.6g
\u5408178,6ml
\u6216:
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\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u4e59\u9187
绛旓細95%涔欓唶250ml,鍚湁涔欓唶鐨勪綋绉负250*95 鎶婅繖浜涗箼閱囬厤鎴70%涔欓唶鍚庣殑浣撶Н涓250*95%/70 闇瑕佸姞鍏ヨ捀棣忔按灏变负 250*95%/70%-250=89.26ml
绛旓細250*锛95/70-1锛=89.3ml 閫夋嫨C,
绛旓細95%*250ml=70%*锛250+X锛夛紝X=66.67ml銆
绛旓細95%涔250ml鏄憾娑蹭腑涔欓唶鐨勫惈閲237.5ml,鐒跺悗闄や互70%鏄70%涔欓唶鐨勬讳綋绉负339.29,鍦ㄥ噺鍘250褰撶劧灏卞緱鍒扮殑鏄渶瑕佸姞鍏ユ按鐨勪綋绉89.29ml
绛旓細绛旓細銆1銆鐜版湁95%涔欓唶250ml,閰嶅埗70%鐨勪箼閱囷細銆2銆戦渶瑕佸姞鍏ョ伃鑿岃捀棣忔按鐨勪綋绉=250x锛95%-70%锛/70% = 89.3 锛坢l锛
绛旓細閰嶅埗sds-page 鑴辫壊娑:250ml 95锛呬箼閱锛80ml鍐伴唻閰革紝瀹氬鍒1000ml锛鍗冲彲锛庢垨鑰 100ml 95锛呬箼閱囷紜50ml鍐伴唻閰革紝瀹氬鍒1000ml锛屽嵆鍙紟
绛旓細01N鐨勬阿姘у寲閽句箼閱囨憾娑叉槸杩欐牱閰嶅埗鐨勶細绉板彇1.8g鐨勬阿姘у寲閽炬憾瑙ｄ簬2.5ml鐨勬按锛岀敤95%鐨勪箼閱囧畾瀹逛簬250ml瀹归噺鐡躲傜櫨閲岄閰氳摑鎸囩ず鍓傜殑閰嶅埗锛氬彉鑹茶寖鍥村湪PH=1.2-2.8鐨勮瘽锛屽氨鏄0.1%锛20%涔欓唶婧舵恫锛夊彉鑹茶寖鍥村湪PH=8.0-9.6鐨勮瘽锛屽氨鏄0.1%锛20%涔欓唶婧舵恫锛
绛旓細鍔犳按绋閲婂晩~闇瑕佽绠椾笌婊村畾瀹氬鐨剘楂樹笁璇炬湰涓婇潰鏈夌殑~
绛旓細娑蹭綋鐨勬祿搴︽槸浣撶Н鐧惧垎娴撳害,鎵浠500ml75%鐨閰掔簿鏄375mL鏃犳按涔欓唶鍔犳按鑷500mL500*75%=375
绛旓細鎮ㄥソ锛屾偍鎸囩殑搴旇鏄75%鐨勬秷姣掔敤閰掔簿锛屼竴鑸敤95%鐨勯厭绮鹃厤姣斻95%*250=75%*X 涓句釜渚嬪瓙 ~渚嬪锛95%鐨勯厭绮500ml锛屾妸瀹冮厤鎴70%鐨閰掔簿锛岄渶瑕鍔犲灏戞按?95%鐨勯厭绮炬憾娑500ml鍚厭绮鹃噺=95%脳500ml=475ml娣绘按鍓嶅悗婧舵恫鍐呴厭绮句笉鍙橈紝鎵浠70%鐨勯厭绮炬憾娑插惈475ml閰掔簿锛岄偅涔70%鐨勯厭绮句腑锛屾讳綋绉负475梅70%鈮678...
