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   Trang 27: ! "#$"%& Trang 49  ! """'()"(*"%"# $ I- Mét sè ph¬ng ph¸p gi¶i nhanh tr¾c nghiÖm ho¸ h÷u c¬    !"  hh hh m M n =  +",-./01./2  3  4./+3     !"#"$"%&'()     *  +  ,    -  .    /0    1 22222222222222222222222222222222223 4567 2 X Y co C H n n n = Yahoo: tat_trung151    4567 2 CO hh n n n = 8 1 2 n a n b n a b + = + ') 9 : ; + 567!9:!; :+ !9:!;  567<*;  567;!) <= V d 1 >;+?@5A)+ ;B:C='1D&+99:;/3=7% &E6+ F=7> B :7 ; > G H=7 ; > G :7 I > C  H=7 I > C :7 B > 9J K=7 B > 9J : 7 L > 9; Suy lun  24,8 49,6 0,5 hh M = = 8 14 2 49,6 3,4.n n+ = → = ;"+7 I > C +7 B > 9J= VÝ dô 2 79B;M+?@5AN ""OPH ; !+!+(""&GBH ; = 9= 7%&E6$M+ Yahoo: tat_trung151    F=7 ; > B :7 I > G H=7 I > C : 7 B > 9J 7=7 B > 9J :7 L > 9; K=7 L > 9J : 7 G > 9; Suy lun  2 64 0,4 160 anken Br n n mol= = =  14 35 0,4 anken M = = 8 14 35 2,5.n n= → = Q)+7 ; > B +7 I > G V d 3 79J:;F?7> B +M?@ 5AN""P":!RS: ?T1U*6= 9= 7%&E6$M+ F=7 ; > B :7 I > G H=7 I > G : 7 B > 9J 7=7 B > C :7 L > 9J K=7 L > 9J : 7 G > 9; ;=VWR1$M+ F=9LX:ILXH=;JX: IJX Yahoo: tat_trung151     7=;LX:;LXK=BJX= 9JX Suy lun: 9= 4 4 2 2CH anken CH anken V V n n = → =        2 7 anken m g = 8  4 10,2 7 0,2 16 CH n − = = 8  7 14 2,5 0,2 n n= → = =  > M+7 ; > B +7 I > G = ;=Y  2 3 2,5 2 n + = = = *5 ;M< =YZ[,\X]XY= ^XY];LX= V d 4:Q$;"1AA"_ ?@BC:B7` ; +;C:C> ; `=VWR1 "+ F=aJX:9JXH=CLX= 9LX  7=CJX:;JXK=SLX= ;LX #$%&'b\ >7>`  F ]9B Yahoo: tat_trung151     cd7>`  F ]9;= V d 1 7>7>`+> ; 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> L d k M M ] 5,475 146 0,0375 = ^k c /BB;a3;]9BG^k c ]J Y%&-M M+/7``7 ; > L 3 ; B= +, /.+, 0,  d'$U&)w:m$! U&<m$ Upf+= FH^7K ' F  H ] 7  K - vw ' +m$!PU& k 4 +m$! U& Yahoo: tat_trung151 [...]... là C x H y , C x H y Ta có: a1+a2+… =nhh 1 x= x1a1 + x 2a 2 + a1 + a 2 + Yahoo: tat_trung1 51 1 2 2  y= Nguyễn Tất Trung—vocalcords ĐT:050024 618 03 y1a1 + y 2a 2 + a1 + a 2 + Nhớ ghi điều kiện của x1,y1… + x1 ≥ 1 nếu là ankan; x1 ≥ 2 nếu là anken, ankin; x1 ≥ 3 nếu là ankadien… Chú ý: + Chỉ có 1 hydrocacbon duy nhất có số ngun tử C =1 nó là CH 4 (x1 =1; y1=4) + Chỉ có 1 hydrocacbon duy nhất có số... n1< n = 16 % Yahoo: tat_trung1 51  Nguyễn Tất Trung—vocalcords ĐT:050024 618 03 B HIDROCACBON: Yahoo: tat_trung1 51  Nguyễn Tất Trung—vocalcords ĐT:050024 618 03 CT chung: CxHy (x ≥ 1, y ≤ 2x+2) Nếu là chất khí ở đk thường hoặc đk chuẩn: x ≤ 4 Hoặc: CnH2n+2-2k,... Trung—vocalcords ĐT:050024 618 03 Thí dụ 1: Đớt cháy hồn tồn hỡn hợp 2 hidrocacbon liên tiếp trong dãy đờng đẳng thu được 22,4 lít CO2 (đktc) và 25,2g H2O Hai hidrocacbon đó là: A C2H6 và C3H8 B C 3H8 và C4H10 C C4H10 và C5H12 D C 5H12 và C6H14 Suy luận: nH2O = nH2O > nCO2 ⇒ 25, 2 = 1, 4 mol ; nCO2 = 1mol 18 2 chất thuộc dãy ankan Gọi n là sớ ngun tử C trung bình: Cn H 2 n + 2 + Ta có: 3n + 1 O2... thì thể tích CO2 (đktc) thu được là: A 1, 434 lít B 1, 443 lít C 1, 344 lít D 1, 444 lít Suy ḷn: Vì anđehit no đơn chức nên sớ mol CO 2 = sơ mol H2O = 0,06 mol → nCO2 ( P 2) = nC ( P 2) = 0,06mol Theo BTNT và BTKL ta có: nC ( P 2) = nC ( A ) = 0,06mol → nCO2 ( A ) = 0,06mol → VCO2 = 22,4.0,06 = 1, 344 lít 5 Đớt cháy ankin: nCO2 > nH2O và nankin (cháy) = nCO2 – nH2O Yahoo: tat_trung1 51  Nguyễn... 2 Ta có: x1< x . B. 0 ,1 mol C. 0,3 mol D. 0,25 mol Gii Theo LBT khi lng: m ancol = m (ete) + mH 2 O > mH 2 O = m(ru) - m(ete) = 13 2,5 - 11 1,2 = 21, 6 g trong PU ete húa thỡ: nete = nH 2 O = 21, 6 /18 = 1, 2 mol . m+ 3U&+99:C= >7>`;F ; ` 3 NH → 7` ; > ; `BF ↓ 1 1 21, 6 0,05 4 4 10 8 HCHO Ag n n mol= = × = = k >7>` ]J:JL=IJ]9:L8 3 11 ,8 1, 5 10 ,3 CH OH m g= − = V d 27?J:9>7``>+J:;>7>`$ "gAP""F` I j> I F+ F=9JC. lut bo ton in tớch: 0 ,1. 2 + 0,2.3 = x + 2y Gii h phng trỡnh > x = 0,2 y = 0,3 Vậy đáp án đúng là đáp án A Vớ d 3: un 13 2,8 gam hn hp 3 ancol no, n chc vi H2SO4 c thu dc 11 1,2 g. Hn hp 6 ete

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