高三第一輪復習物質的分離與提純

1、石門中學我們畢業(yè)啦其實是答辯的標題地方物質的分離提純班級授課老師201609秦澤鑫考試要求含義與原則常見物理方法常見化學方法問題討論CONTANTS總結考試要求含義原則物理方法化學方法問題討論1、了解過濾、結晶、萃取、蒸餾等物質分離、提純的常用方法，能對常見物質進行分離和提純；“”2、能綜合運用化學實驗原理和方法，設計實驗方案解決分離提純問題?？偨Y考試要求含義原則物理方法化學結果問題討論分離提純區(qū)別利用物質的性質差異將其組分彼此分開，得到純凈物組分的過程。將混合物中雜質除去，以提高目標物質純度。分離出來的物質都是目標物質。提純得到的物質是目標物質?？偨Y考試要求含義原則物理方法化學結果問題討論原

2、則不增易復原易分離不減不引入新的雜質不減少目標物質目標物質與雜質易分離目標物質容易復原總結含義原則物理方法化學方法問題討論考試要求例題1用物理方法將下列混合物進行分離。用物理方法將下列混合物進行分離。（1）固體混合物：）固體混合物：氯化銀中的氯化鈉氯化銀中的氯化鈉 硝酸硝酸鉀中的氯化鈉鉀中的氯化鈉 氯化鈉中的碘。氯化鈉中的碘。（2）液體混合物：）液體混合物：石油中的汽油、柴油石油中的汽油、柴油 溴溴水中溴和水水中溴和水 氫氧化鐵膠體中的氯化鐵氫氧化鐵膠體中的氯化鐵 蛋蛋白質和水白質和水 氯化鈉溶液中的水。氯化鈉溶液中的水。（3）氣體：）氣體：空氣中提取氮氣空氣中提取氮氣 氯氣中除去氯氯氣中除去

3、氯化氫化氫（1）溶解、過濾溶解、過濾 溶解、結晶、過濾溶解、結晶、過濾 升華升華（2）分餾分餾 萃取、蒸餾萃取、蒸餾 滲析滲析 鹽析、鹽析、過濾過濾 蒸發(fā)、冷卻蒸發(fā)、冷卻（3）液化、蒸發(fā)液化、蒸發(fā) 飽和食鹽水洗氣飽和食鹽水洗氣 答案總結含義原則物理方法化學方法問題討論考試要求過濾NaCl(CaCO3)注意點KNO3(NaCl)結晶適用范圍溶 解 度 差 別大 的 溶 質 分離滲析淀粉與NaCl適用范圍分 離 膠 體 與混 在 其 中 的分子、離子CO2(HCl)洗氣注意點長進短出一貼、二低、三靠；沉淀要洗滌；定量 實 驗 要“無損”總結含義原則物理方法化學方法問題討論考試要求例題2判斷下列說法

4、是否正確。判斷下列說法是否正確。（1）蒸發(fā)操作時，待蒸發(fā)皿中的水分完全蒸干）蒸發(fā)操作時，待蒸發(fā)皿中的水分完全蒸干后再停止加熱。后再停止加熱。（2）分液操作時，分液漏斗中下層液體從下口）分液操作時，分液漏斗中下層液體從下口放出，上層液體從上口倒出。放出，上層液體從上口倒出。（3）選用水將溴從苯中萃取。）選用水將溴從苯中萃取。（4）為加快過濾，可用玻璃棒在漏斗適當攪拌。）為加快過濾，可用玻璃棒在漏斗適當攪拌。（5）蒸餾操作中，溫度計的水銀球應置于液面）蒸餾操作中，溫度計的水銀球應置于液面以下。以下?？偨Y含義原則物理方法化學方法問題討論考試要求例題3為提純下列物質（括號內(nèi)的物質是雜質），所為提純下列

5、物質（括號內(nèi)的物質是雜質），所選用的除雜試劑和分離方法都正確的是（選用的除雜試劑和分離方法都正確的是（ ）。）。C總結含義原則物理方法化學方法問題討論考試要求分離提純CO2(O2)MgCl2(FeCl3)NaHCO3(Na2CO3)CuS(FeS)氧化還原法轉化法水解法酸堿溶解法總結含義原則物理方法化學方法問題討論考試要求例題4制備下列有機化合物時制備下列有機化合物時,常會混有括號內(nèi)的雜質常會混有括號內(nèi)的雜質,以下除雜方法正確的是以下除雜方法正確的是A苯（苯酚）苯（苯酚）,加入濃溴水加入濃溴水,分液分液B乙烷（乙烯）乙烷（乙烯）,催化條件下通入催化條件下通入H2C乙酸（乙醛）乙酸（乙醛）,加入

6、新制氫氧化銅加入新制氫氧化銅,蒸餾蒸餾 D甲酸乙酯（甲酸）甲酸乙酯（甲酸）,用飽和碳酸鈉溶液洗滌、用飽和碳酸鈉溶液洗滌、分液分液答案D總結含義原則物理方法化學方法問題討論考試要求例題5為了除去粗鹽中的為了除去粗鹽中的Ca2+， Mg2+，SO42-及泥沙，及泥沙，得到純凈的得到純凈的NaCl，可將粗鹽溶于水，然后在下，可將粗鹽溶于水，然后在下列操作中選取必要的步驟和正確的操作順序列操作中選取必要的步驟和正確的操作順序過濾；加過量過濾；加過量NaOH溶液；加適量鹽酸；溶液；加適量鹽酸；加過量加過量Na2CO3溶液；加過量溶液；加過量BaCl2溶液溶液A B C D答案B總結含義原則物理方法化學方

7、法問題討論考試要求HCl在過濾之后為了除去Ca2+過量的Ba2+Na2CO3在BaCl2之后粗鹽粗鹽提純提純?yōu)榱顺ミ^量的NaOH，Na2CO3，可選用pH試紙控制加入量，或直接蒸發(fā)總結問題討論化學結果含義原則物理方法考試要求例題6具有揮發(fā)性（或易升具有揮發(fā)性（或易升華）華）具有較好的熱穩(wěn)定性具有較好的熱穩(wěn)定性HNO33Cu+8HNO3(稀稀)=3Cu(NO3)2+2NO+4H2O3Ag+4HNO3(稀稀)=3AgNO3+NO+2H2O總結問題討論化學方法含義原則物理方法總結考試要求123方法總結善于利用物質的物理性質差異，如熔沸點、溶解度等善于利用物質的化學性質，如氧化還原性、水解條件與范圍

8、、酸堿性等善于利用題目中已知信息THANKSFromJackhim論文緒論研究背景研究方法研究結果問題討論論文總結例題3增大固體接觸面積，加快反應速率BSiO22Fe2+2H+H2O=2Fe3+2H2ODFe(OH)33Cu2(OH)2CO3+4NH3=6Cu+3CO2+9H2+2N22研究結果It was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. 研究背景研究方法研究結果問題討論It was the best of times,

9、it was the worst of times; it was the age of wisdom, it was the age of foolishness. It was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. 論文緒論論文總結研究背景研究方法研究結果問題討論TEXTTEXTTEXTIt was the best of times, it was the worst of times; it was the age of

10、 wisdom, it was the age of foolishness. It was the epoch of belief, and it was the epoch of incredulity. It was the season of light, and it was the season of darkness. It was the spring of hope, and it was the winter of despair. 論文緒論論文總結畢業(yè)論文題目研究背景研究方法研究結果問題討論It was the best of times, it was the wors

11、t of times; it was the age of wisdom, it was the age of foolishness. 論文緒論論文總結問題討論It was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. 問題討論研究結果研究背景研究方法TEXTswoTIt was the best of times, it was the worst of times; it was the age of wisdom, it was

12、 the age of foolishness. ADD TITLEIt was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. ADD TITLEIt was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. ADD TITLEIt was the best of times, it

13、 was the worst of times; it was the age of wisdom, it was the age of foolishness. ADD TITLE論文緒論論文總結問題討論研究結果研究背景研究方法123TEXTIt was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. It was the epoch of belief, and it was the epoch of incredulity. It

14、was the season of light, and it was the season of darkness. It was the spring of hope, and it was the winter of despair. ADD YOUR TITLEIt was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. It was the epoch of belief, and it was the epoch of inc

15、redulity. It was the season of light, and it was the season of darkness. It was the spring of hope, and it was the winter of despair. ADD YOUR TITLEIt was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. It was the epoch of belief, and it was the

16、 epoch of incredulity. It was the season of light, and it was the season of darkness. It was the spring of hope, and it was the winter of despair. ADD YOUR TITLE論文緒論論文總結論文總結It was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. 問題討論研究結果研究背景研究方法論

17、文總結ABCIt was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. It was the epoch of belief, and it was the epoch of incredulity. It was the season of light, and it was the season of darkness. It was the spring of hope, and it was the winter of desp

18、air. ADD YOUR TITLEIt was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. It was the epoch of belief, and it was the epoch of incredulity. It was the season of light, and it was the season of darkness. It was the spring of hope, and it was the winter of despair. ADD YOUR TITLEIt was the best of times, it was the worst o