将500毫升95%的酒精加水后，使它成为75%的酒精溶液，大约加水？毫升
\u5c06600\u6beb\u5347\u6d53\u5ea6\u4e3a95\uff05\u7684\u9152\u7cbe\uff0c\u7a00\u91ca\u6210\u6d53\u5ea6\u4e3a75%\u7684\u6d88\u6bd2\u9152\u7cbe\uff0c\u9700\u8981\u52a0\u6c34\u591a\u5c11\u6beb\u5347\uff1f\u4f1a\u4e0d\u4f1a\u5341\u5b57\u4ea4\u53c9\u6cd5\uff1f
\u6211\u793a\u8303\u4e00\u4e0b\u2026\u2026
\u6c34\u7684\u9152\u7cbe\u6d53\u5ea6\u662f0%\u54c8
\u8fd9\u6837\u505a
\u6c34 0%\u25a1\u25a1\u25a1\u25a120
\u76ee\u6807\u6d53\u5ea6\u25a175%
\u9152\u7cbe 95%\u25a1\u25a1\u25a1\u25a175
\uff08\u8bf7\u628a\u65b9\u5757\u770b\u6210\u7a7a\u683c\u2026\u2026\u592a\u9ebb\u70e6\u4e86- -\uff09
\u4e0a\u9762\u662f\u4ea4\u53c9\u76f8\u51cf\u54e6\u3002\u5c31\u662f\u591a\u5f97\u51cf\u5c11\u7684 \u53d6\u7edd\u5bf9\u503c \u5f97\u5230\u768420:75\u5c31\u662f\u4f53\u79ef\u6bd4\u4e86
\u6c34\uff1a\u9152\u7cbe=20/75\uff1d4/15
\u6c34\u7684\u4f53\u79ef\u5c31\u7b49\u4e8e600*4/15=160ML\u4e86~
\u5176\u4ed6\u529e\u6cd5\u5c31\u8981\u5217\u65b9\u7a0b~
\u8bbe\u6c34\u4f53\u79ef\u4e3aX~
(95\uff05\u00d7600\uff0bX)\(600+X\uff09\uff1d75\uff05
\u89e3\u51fa\u6765\u8fd8\u662f160ml
\u63a8\u8350\u638c\u63e1\u5341\u5b57\u4ea4\u53c9\u6cd5~\u4e0d\u5149\u662f\u7b97\u6d53\u5ea6\uff0c\u7b97\u6709\u673a\u7269\u7ec4\u6210\uff0c\u6df7\u5408\u6c14\u4f53\u90fd\u5f88\u65b9\u4fbf
\u5177\u4f53\u63a8\u7b97\u8fc7\u7a0b\u4ec0\u4e48\u7684\u53ef\u4ee5\u95ee\u95ee\u8001\u5e08\uff0c\u8001\u5e08\u4eec\u5e94\u8be5\u90fd\u4f1a\u8fd9\u529e\u6cd5~
266.67ml
1000*95%\u662f\u7eaf\u9152\u7cbe\u7684\u542b\u91cf
\u9152\u7cbe\u542b\u91cf\u9664\u4ee575%\u662f\u914d\u7f6e\u540e\u7684\u603b\u91cf
\u603b\u91cf\u51cf\u53bb1000\u6beb\u5347\u5c31\u662f\u8981\u52a0\u7684\u6c34\u7684\u91cf\u4e86
需加水为，=633.33*0.25-500*0.05=133.33(ml)
25
绛旓細95%鐨勯厭绮瀵嗗害绾︿负0.8g/ml 鎵浠ラ渶瑕鍔犳按=0.8*500*95%/60%-0.8*500=233.3g
绛旓細鍏堢湅鍓嶆彁锛500ml鐨95%鐨勯厭绮锛屾墍浠ヨ绠楀嚭鍏朵腑閰掔簿鐨勫惈閲忥細閰掔簿鍚噺=500ml脳95锛=475ml 鍔犱笂150ml姘村悗锛屾暣浣撲綋绉负锛500+150=650ml 鍏朵腑閰掔簿鏈475ml 鎵浠ラ厭绮惧惈閲=475梅650脳100锛呯害绛変簬73锛
绛旓細鍒╃敤鍏紡璁＄畻姣旇緝澶嶆潅锛屽閰嶆瘮瑕佹眰绮惧害涓嶉珮鐨勫彲浠ヨ繖鏍峰厬銆95%鍜75%鐩稿樊20%锛95%閰掔簿100ml鍔犲叆20ml姘村氨鍕惧厬鎴120ml鐨75%鐨勯厭绮浜嗐傚彲鏍规嵁闇瑕佷互姝ょ被鎺ㄣ
绛旓細鍔犲叆133姣崌姘 璁＄畻鏂规硶濡備笅锛500姣崌鐨勯厭绮句腑锛岀函閰掔簿閲忎负 500*95%=475姣崌 閭ｄ箞杩475姣崌閰掔簿濡傛灉琚█閲婃垚75%鐨勯厭绮鐨勮瘽锛屾婚噺搴旇鏄475/75%=633姣崌銆傚啀鐢633-500=133姣崌锛岃繖灏辨槸澶氬姞鐨勬按閲忋
绛旓細500*95%=(500+x)*75%锛寈=133.3姣崌銆75%鐨勯厭绮锛堜綋绉垎鏁帮級鍙敤浜庣毊鑲ゆ秷姣掞紝浣嗕笉鍙敤浜庨粡鑶滃拰澶у垱闈㈢殑娑堟瘨銆傚湪鐢熺墿璇曢獙涓婏紝寰敓鐗╃伃鑿屽彲浠ラ噰鍙栧共鐑伃鑿岋紝婀跨儹鐏弻锛屾煇浜涘鏂欏埗鍝佽瘯楠屽悗锛屼负浜嗛槻姝㈡墿澶ф薄鏌擄紝鍙互鍏堝湪75%閰掔簿鍐呮蹈娉24灏忔椂锛岀粏鑿岀湡鑿岀瓑閫氬父灏卞彲浠ヨ鏉姝汇傛棩甯哥敓娲讳腑锛屽父瑙佷竴浜涗汉鐢ㄥ尰鐢...
绛旓細500姣崌闇瑕佸姞鍏133.33ml鐨勮捀棣忔按灏卞彲浠ラ厤鎴75%鐨勯厭绮浜嗐備互500姣崌95%閰掔簿閰嶆垚75%閰掔簿涓轰緥锛500ml鐨95锛呴厭绮句腑鍚厭绮撅細500脳95锛咃紳475锛75%閰掔簿涓嫢鏈475鍏嬮厭绮撅紝鍏舵婚噸閲忎负475梅75锛咃紳633.33ml锛屾墍浠ラ渶瑕佸鍔犳按鐨勬婚噺涓猴細633.33锛500锛133.33ml銆傦紙钂搁姘达級...
绛旓細鍙互鍔犺捀棣忔按178.57姣崌銆傝绠楁柟娉曞涓嬶細500姣崌鐨勯厭绮句腑锛岀函閰掔簿閲忎负 500*95%=475姣崌锛涢偅涔堣繖475姣崌閰掔簿濡傛灉琚█閲婃垚70%鐨勯厭绮鐨勮瘽锛屾婚噺搴旇鏄475/70%=678.57姣崌锛涘啀鐢678.57-500=178.57姣崌锛岃繖灏辨槸澶氬姞鐨勬按閲忋
绛旓細500姣崌闇瑕佸姞鍏133.33ml鐨勮捀棣忔按灏卞彲浠ラ厤鎴75%鐨勯厭绮浜嗐備互500姣崌95%閰掔簿閰嶆垚75%閰掔簿涓轰緥锛500ml鐨95锛呴厭绮句腑鍚厭绮撅細500脳95锛咃紳475锛75%閰掔簿涓嫢鏈475鍏嬮厭绮撅紝鍏舵婚噸閲忎负475梅75锛咃紳633.33ml锛屾墍浠ラ渶瑕佸鍔犳按鐨勬婚噺涓猴細633.33锛500锛133.33ml銆傦紙钂搁姘达級...
绛旓細閰掔簿绋閲婏細鎶婇珮娴撳害鐨勶紙95%锛夐厭绮撅紙鏈500姣崌鍖呰鐨勩95%閰掔簿锛夛紝鍔犱竴瀹氫綋绉按鍚庯紝閰嶅埗鎴愪綆娴撳害鐨勶紙75%锛夐厭绮剧殑杩囩▼銆傞厤鍒100姣崌75%閰掔簿璁＄畻寮忥細姹傚彇95%閰掔簿鐨勪綋绉疺=锛75%涔樹互100姣崌锛夐櫎浠95%=78.9姣崌銆傜█閲婃搷浣滐細鍦100姣崌鐨勫共鐕ュ共鍑鐨勯噺绛掍腑鍔犲叆78.9姣崌95%閰掔簿锛岀敤钂搁姘寸█閲婅嚦100姣崌鐨...
绛旓細绋閲婂嵆鍙備緥濡傚彇100mL95閰掔簿锛95/0.75=126.67锛岄渶瑕佸姞26.67mL鐨勬按锛屽氨閰嶆垚浜75搴﹂厭绮俱傞厭绮剧█閲婏紝灏辨槸鎶婇珮娴撳害鐨勶紙95%锛夐厭绮撅紙鏈500姣崌鍖呰鐨勩95%閰掔簿锛夛紝鍔犱竴瀹氫綋绉按鍚庯紝閰嶅埗鎴愪綆娴撳害鐨勶紙渚嬪75%锛夐厭绮剧殑杩囩▼銆備緥濡傞厤鍒100姣崌 75%閰掔簿 锛氳绠楀紡姹傚彇95%閰掔簿鐨勪綋绉 V =( 75%x100ml)/...
