... http://www.docs.vn Email : lienhe@docs.vn Tel (: 0918.775 . 36 8 - NaOH d ng vi n - Dung d ch H 2O2 30 % - Zn(NO3 )2 6H 2O tinh thể 20 - Ni(NO3 )2. 6H 2O tinh thể - NaNO2 tinh thể - Dung d ch Ni2+ chu n 1000ppm ... ph n lớp mạ 3.6. 1 Xử lý mẫu 3.6 .2 Xác định hàm lượng Ce3+ lớp mạ phương pháp trắc 24 25 29 31 31 32 33 34 34 34 34 39 42 42 42 quang 3.6 .3 Xác định Ni2+ lớp mạ phương pháp F-AAS 3.6 .4 Xác định ... xác cho từ từ v o dung d ch,do phức NTĐH với EDTA b nnn dung d ch xảy ph n ứng t o phức: Ln +3 + Ind3- = Hồng LnInd Xanh LnInd + H2Y2- = LnY- + Ind3- + 2H+ Xanh Hồng Ln +3 : ion NTĐH hoá trị...
... OAc ON R N OAc NN AcO N R 8d- q/ 9d- p Ac2 O CH 2Cl2 O OAc NO CH3 N R R1 N AcO 45 -48 h OO 12a-f/13a-f OAc N S H NOO 14a-f/15a-e R OAc O R H N AcO N OAc 9d- q/ 8d, q Zn(CH3COO )2 ON EtOH khan O ... R2 NN HNO2, AcOH R2 NN -N2 NO S 48 S NH S NO 50 49 b) Nhúm hidrazino 2- Hydrazino-1 ,3, 4- thiadiazin (51) phn ng vi aldehyd cho 2 -alkyl( aryl) idene hydrazino-6H-1 ,3, 4- thiadiazin ( 52) R1 R1 NN ... mt nguy n t oxy enolat ngoi vũng (Hỡnh 1.1): O - ONON - NO R OON + N O6 R N C5 O1 H C4 N3 OON R + + R N2 O R - ON + NNOON + R N - R Hỡnh 1.1 S ph n b electron ph n t sydnone S phõn...
... (GLYCOPYRANOSYL)THIOSEMICARBAZONError! Bookmark not defined 2. 7.1 Tổnghợphợp chất 2- iminothiazolidin -4- on (12a-f)Error! Bookmark not Bookmark not defined 2. 7 .2 Tổnghợphợp chất 2- iminothiazolidin -4- on (13a-f)Error! defined ... Error! Bookmark not defined 2.2TỔNGHỢPCÁCHỢP CHẤT 3- ARYL -4- FORMYLSYDNONE Error! Bookmark not defined 2. 2.1 Tổnghợp chất 3- arylsydnone (4a-t) Error! Bookmark not defined 2.2 .2 Tổnghợp chất ... THIOSEMICARBAZID .Error! Bookmark not defined 2.4. 1 Tổnghợp N- (2, 3, 4, 6- tetra- O- acetyl- ß -D- glucopyranosyl)thiosemicarbazid Error! Bookmark not defined 2.4 .2 Tổnghợp N- (2, 3, 4, 6- tetra- O- acetyl- ß -D- galactopyranosyl) thiosemicarbazid...
... Goodbye D Good night I … Andy A are B am C is D you Stand ……, please A down B up C in D on You …… Long A is B be C are D am Goodbye …… A Nice to meet you B See you later C Goodmorning D Goodevening ... third month of the year?-…… a.January b.March 28 :… noodles for dinner last night? a.Did you eat b.Were you eat c.Did you ate d. Do you ate b.learning c.writing d. evening 29 .Odd one out: a.playing ... he d you Choose the odd one out a she b my c he d you Bài 7: Choose the correct answer Good morning, teacher -……………… a Goodbye b See you later c Good morning d Fine, thanks I’m fine, thank……………...
... pl………g badminton? No, I don’t 64 / His classroom is b_g It’s not small 65 / Read… me, please a.on to c.after d. in 66 / Odd one out: a.cloudy b.rainy c.sunny d. weather 67 / don’t / I / books./ reading / ... grandpa 167 / ……, students.See you later a Good morning b Good night c Goodbye d Nice to meet you 168 / Do you clean your…………… ? (nghe) a bedroom b art room c bathroom d classroom 169 /is / brown ... Children should drink milk and fruit juices everyday Câu 62 What does Mary often in the morning? Câu 63 You shouldn’t eat too much beef Câu 64 Let’s count down from ten to one Câu 65 What you … your...