2018年高中五星級題庫化學(xué)第6版參考答案,小編已經(jīng)在答案圈整理好,感興趣的同學(xué)來了解一下dp1答案圈
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2018年高中五星級題庫化學(xué)第6版參考答案
ISBN編號:9787542864222高中五星級題庫由上??萍冀逃霭嫔绯霭?,本書被譽(yù)為輔教中的常春藤,在注重基礎(chǔ)的同時還有更多的創(chuàng)新,考點(diǎn)全面,題型多樣,同時小編收集的答案也是非常詳細(xì),大家在練習(xí)完按題號核對dp1答案圈
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蒸餾水是不是純凈物?
化學(xué)老師說蒸餾水是純凈物是因?yàn)槔蠋熥鰧?shí)驗(yàn)要拋開除了水以外其它因素的影響,可是老師又不可能真的給你找來不含任何其它物質(zhì)的水,那做化學(xué)實(shí)驗(yàn)的時候,老師就會告訴你把蒸餾水等同于純凈物看,注意是等同于純凈物看,因?yàn)檎麴s水中的其它物質(zhì)含量很少,對做化學(xué)實(shí)驗(yàn)來說基本沒有影響,就忽略不計(jì)了。如果不等同純凈物來看,可以說,化學(xué)實(shí)驗(yàn)是基本上都是沒辦法做的,因?yàn)楝F(xiàn)實(shí)生活中很難能找到完全的純凈物。dp1答案圈
而物理老師告訴你蒸餾水不是純凈物,是因?yàn)檎麴s水中確實(shí)含有其它物質(zhì),即便是它很少,但是只要存在,蒸餾水就不是純凈物。而物理上來說的純凈物只是讓你去理解,并不需要你理解為等同純凈物,或者做實(shí)驗(yàn)探究除了水以外的其它物質(zhì),物理只是讓你了解這么個情況,只需要你判斷一下是不是純凈物,所以從嚴(yán)格意義上來說它就是混合物。dp1答案圈