Hướng Dẫn Chấm Chọn HSG Hóa 12 (10-11)

SỞ GIÁO DỤC VÀ ĐÀO TẠO ĐỒNG THÁP  KỲ THI CHỌN HỌC SINH GIỎI LỚP 12 THPT CẤP TỈNH NĂM HỌC 2010 - 2011  HƯỚNG DẪN CHẤM ĐỀ THI CHÍNH THỨC MÔN: HOÁ HỌC (Hướng dẫn chấm và biểu điểm gồm có 07 trang) Câu 1:(2,0 điểm) 1. !"#$%&'' ()*+ !",--. /01''()*2 a. !(32 b. 456789!'':!$" !"#$%:,--2 c. ;$"9< =>*4 & ?  2 2. ;* $@%8"!,6'#!$@''A B' 8 C  D 3 NO − D H + →  3 Fe + D 2 4 SO − D?D4 & ? Đáp án câu 1 ĐÁP ÁN ĐIỂM 1. a. AE6 & &6 & & 1 6 &  8 F.&'()* !"#$%/'01' !",--=8 G/ ⇒ HICJ 0,25 b.  0,25 x 3 (0,75) c. 4 & IC4 & 4 & CJ: K,LIMNJ; ?  IC?  JAO"!(P2 0,25 x 2 (0,5) 2. & +3 +6 x y +5 Fe S x Fe + y S + (3x + 6y)e .1 N + 3e N .(x + 2y) + → → B' 8 C  DI8D&J 3 NO − D/8 H + → 8 3 Fe + D & 4 SO − DI8D&J?D&84 & ? 0,5 Câu 2: (2,0 điểm) 1. !(3!QR;:%6A RD4 & C? / I(0J 0 t → S-QD22222222 IEJ TD4 & C? / I(0J 0 t → S-RD22222222 I&J QDR → ;I7JD2222 IJ 2. 4U VV1/,-QIEJ:<<3VV/?4(E-< <32 a.O-,""<<32  b.O-4<<32 R"9A4@6*"8" 1 -1,76 a K 10= : W&E EV 2 a K − = Đáp án câu 2 ĐÁP ÁN ĐIỂM 1. 2RD&4 & C? / I(0J 0 t → C? & ↑ DR & D & C? / D&4 & ?IEJ IQJ XTDY4 & C? / I(0J 0 t → 4 & C ↑ D/T & D/ & C? / D/4 & ?I&J IRJ 0,25 x 3 6 &  / 6 &   < E 6 E   < & < V ĐÁP ÁN ĐIỂM C? & D&4 & C → C ↓ D&4 & ?IJ I;J (0,75) 2.a. VV1/ 1/ 2 SO n 0,001mol= = Z VV/ /V NaOH n 0,001mol= = ⇒ ["4C?    C? & D?4 → 4C?   3 NaH¸SO m 0,001.104 = 0,104gam⇒ = 0,25 2. b \4C?  ]G\4C?   ]GEV  ^ 4C?  → D D 3 HSO − 4 & C?   ˆ ˆ† ‡ ˆˆ 4 D D  3 HSO −   IEJ 1 -1,76 a K 10=   3 HSO −  ˆ ˆ† ‡ ˆˆ 4 D D 2 3 SO −  I&J W&E EV 2 a K − = 4 & ? ˆ ˆ† ‡ ˆˆ 4 D D OH − IJ 14 W K 10 − = O_IEJ:IJ2  3 HSO − D4 & ? ˆ ˆ† ‡ ˆˆ 4 & C?  D OH −   E&&/ 2 b K 10 − =  2 b K `` 2 a K  ⇒ a<3-8"2 baA 2 a K cc 2 b K : W K I&J"99A  3 HSO −  ˆ ˆ† ‡ ˆˆ 4 D D 2 3 SO −  I&J R(  10 − \]  10 x − − 88 W&E  EV EV 2 2 a x K x − − ⇒ = = −  6 x = 7,82.10 − ⇒ pH 5,1⇒ ≈ b40<A W K `` 2 2 a K C [;` 1 a K A\4 D ]G E a a a 2 1 2 a a 1 1 . . . + + K C K K C K C 1 K C − = G  EV W1E EV  EV2 &EW EV2 W1E EV − + − −−− GW1/2EV 1 ⇒ 4 ≈ YE 1,0 Câu 3:(2,0 điểm) 1. ;d<e''"245*$"f!<<3(g"$"f6A;4C? /  ;; & Q;  B';   & ;?  2IN"9%8%< "J 2. [)<<38"4Qh()^;@6*"8"S  :()("f" α 2ij $".-S  '&k6 α :;2IRlm6g("f"nJ Đáp án câu 3 ĐÁP ÁN ĐIỂM 1. ;''":o"p2[ph<<3 & ;?   !p+ ",q2 2 3 CO − D4 & ? ˆ ˆ† ‡ ˆˆ  3 HCO − D OH − ae & ;?  (.:!p+ "2 [p6"$>,-,q4C? / 2 3 CO − D&4 D →4 & ?D;? & r [p ,97,':6"$>,-,qQ;  &Q D D 2 3 CO − D4 & ?→&QI?4J  sD;? & r [p ,9(l*:6"$>,-,qB';  &B' D D 2 3 CO − D4 & ?→&B'I?4J  sD;? & r [p ,97;; & ; &D D 2 3 CO − →;;?  s [p,q "f;2 1,0 2. ĐÁP ÁN ĐIỂM & & I J + a HA H + A Bñ C C C [ ] C - C C C K C - C 1 - α α α α α α α − ⇒ = = ƒ 1,0 Câu 4:(2,0 điểm) 1. ;%AQDR → ;Da t"-"f:n"Mh(),!:(M,9m%6(*I"f (),q(_"JA O-"f h()I^J O()I^LJ A B E V& V& / 16,0.10 − & VE VE / 2,0.10 −  V& VE / 4,0.10 − O-@6(),%::"9$".()%2;$"9$j%u 2.;6#(h6A ++ + + + + 6 2 2 1 2 3 4 5 7 ACl H O NaOH NaOH NaOH A A A A A A A → → → → → → R"9AQ(("P9$@!om0"!:E&VV V ; +("f2 Q W ,9:2 !(3!QQ E Q & Q  Q / Q Y Q 1 Q W I,qv:"9%!>J Đáp án câu 4 ĐÁP ÁN ĐIỂM 1. R".()< A  R 8 Q ;;,N ××=  ⇒ N E G,IV&J 8 2IV&J  G / 16,0.10 −  N & G,IVEJ 8 2IVEJ  G / 2,0.10 − N  G,IV&J 8 2IVEJ  G / 4,0.10 −   & JI & & N E N = + = yx ⇒ I8DJG E && & N  N == x   ⇒ 8GEZG&  ⇒ N & G,IVEJ E 2IVEJ & G / 2,0.10 −  ⇒ ,GV& NGV&2 E Q ; 2 & R ; I%$jG8DGED&GJ 0,5 0,25 0,25 2. A: w A 1 : w; Y A 2 : 4  w? / A 3 : 4 & w? / A 4 :  & 4w? / A 5 :   w? / A 6 : Q?  A 7 : Q  w? / 0,125 x 8 (1,0) Câu 5A(2,0 điểm) 1. a<" x y z  z "A 2 Ca +  Na +   4;? − : {  ; − ( z 6q z  | " ; − (q" 6" Na + 2;)<<" x y |  z :# z "<<" x ?4I<J(# x / , z  | 2;)<<" x y {  x " |  z :# z "<<" x ;I?4J & I<J(# x Y, z   | 2[ x , z  z (6q"( z  x <<" x y} { (# x * z  z ,2!(3"!3 2 2. ;~EXoh;:B'  ? / !<U:n"<<34?  5(: ,(P2C,"!%8%(YV/-,-?I6%k,< (,J<<3•:+ "1," "2;q <<3•(",2! (3"!32 Đáp án câu 5 ĐÁP ÁN ĐIỂM 1. a,9vI&Jn#vIEJ26 3 HCO − G 2 3 CO − n# 2 Ca + wvIEJA 3 HCO − D OH − € 2 3 CO − D4 & ? 2 Ca +  D 2 3 CO −  €;;?  ↓ ⇔ IEJ / VV/ EVV 2+ 3 CaCO Ca n n mol= = = wvI&JA 3 HCO − D OH − € 2 3 CO − D4 & ? 2 Ca +  D 2 3 CO −  €;;?  ↓ ⇔ I&J Y VVY EVV 3 3 CaCO HCO n n mol − = = = OAC!"<<3yA A A A A 2 3 Ca 0,04. 2 = 0,08 mol HCO 0,05. 2 = 0,1 mol Cl 0,12 mol Na 0,06 mol + − − +        F'<<3y(6q"(9 A I 3 2HCO dd) − 0 t →  2 3 CO − D;? & ↑ D4 & ? ↑  + 2+ 2 2 3 CO H O Na Ca HCO Cl m = m m m m m m − − + + + − − VE & m = 0,06(23)+ 0,08(40)+ 0,1(61) + 0,12(35,5) (44 + 18) = 11,84g− 1,0 2. S" "+<;:"67(6•"67ITTJI;,B' D J B'  ? / D&X4?  €~B'I?  J  D?DE/4 & ? 8 8  x  ;DX4?  €;I?  J & D&?D/4 & ?   &  y  ;D&B'I?  J  €;I?  J & D&B'I?  J &  & x 8  & x 8 S"%A~EX‚1GXX& &&8D1/ID  & x JGXX&IEJ NO n G &&YV /&& V/Y =  ⇒  x D &  y GV&&YI&J OƒIEJ:I&J ⇒ 8GV&&YGV&&Y ["(h;I?  J & :B'I?  J & ,"A  0,225.3 m = (0,225 + )188 + 3.0,225.180 = 227,25g 2 1,0 Câu 6A(2,0 điểm) 1. N"9q :>"!(h* ; / 4 ~ ;2  2. K"%"-$@#9% "6,"*E$&&<"'q" t$„#I?4J &'$&"P#&&<"'E2 Đáp án câu 6 ĐÁP ÁN ĐIỂM 1. 0,25 x 4 ĐÁP ÁN ĐIỂM ;4  ;4 ; ;4 & ;4  ; ;4 & ;4 & ;4 & ;4  ; ;4 & ;4 ;4  ;4  ;4  ; ; ;4  ;4  &$E$E&'&&' (1,0) 2. ; ;4 & ; ;4  ;4  ;4  ;4 & ; ;4  ;4  ;4  D 4? ;4 & ; ;4  ;4  ;4  ;4  ; ;4  ;4 & ;4  D ;4  ; ;4  ?4 ;4 & ;4  ;   I J ITJ ITTJ ?4 ?4  ?4  IQJ IRJ aAITJ.:3'6ITTJ$P#IRJ"P#IQJ (1,0) Câu 7A(2,0 điểm) 1. 4IQJ;4  ;4I?4J;4G;4;4  /(h*j.2N•L/(h* j.(2 2. 458!(3q •…†6#(h6AI,qv:"9% !>J  &J 0 + + 1) + 2 5 2 2 + 10 12 2 2 4 2 C H OH Cl (1:1) CO Mg aùnh saùng ete H O/ H H SO ñaëc, t Toluen X Y Z R(C H O )→ → → → Đáp án câu 7 ĐÁP ÁN ĐIỂM 1. ; ; 4 ;4 ?4 ;4  4 ;4  ; ; 4 ;4  4 ;4 ?4 ; ; 4 ;4 ?4 ;4  ;4  4 ;4  ; ; ;4  4 4 ;4 ?4 ;4  ITJ ITTJ ITTTJ ITNJ 0,25 x 4 (1,0) 2. ;4 & ; ;4 & [; ;4 & ;??4 ;4 & ;??; & 4 Y IJ I•J I…J I†J (1,0) Câu 8A(2,0 điểm) 1. Oƒ$'„':!:q#8L!v"9,!(:"96#(h%>("P 9A a. meta-"$'„' b. 8"meta-$$'„" 2. 4""e*,"I;4  J  :;4  ;4 & ;4 & 4 & 2[)6q"/~  ;+  "6q"  ;2;$"9"f() 6q"uK"%"-2 Đáp án câu 8 ĐÁP ÁN ĐIỂM 1. ĐÁP ÁN ĐIỂM ? & D4?? & 4 & C? / D; & B' ? & ; IJ ;4  D;4  ; Q;  DR & B' ;??4 IJ DS[? / ;??4 R 0,5 0,75 2. ;4  ;4 & ;4 & 4 & IQJ6q"/~ V ;+I;4  J  IRJ6q" V ; K"%"-A IQJ",9"("*+IRJ=,q()6q"IRJ#IQJ 40IRJLh,P()6q"#2 0,25 0,5 Câu 9A(2,0 điểm) 1. S"*//V)'"I J(Y1V": EYVV"8"2N"9q .'"2 2. N"9q"9B"6#!6A a. ICJ‚$&ICJ‚$2 b. &I†J"ICJ‚'2 Đáp án câu 9 ĐÁP ÁN ĐIỂM 1. EYVV V& WY glixin n mol= = ; V/ alanin 35,6 n 89 mol= = w'"DI8DEJ4 & ? → 84 & ;4 & ;??4D4 & ;4I;4  J;??4 ROSiA 2 H O m = EYDY1‚//GW& V/ 2 H O n mol⇒ = OdfA V/ x + y - 1 x y x = 1; y = 2 0,2 0,4 = = ⇒ X ⇒ "'"h&QDEK ⇒ ;O;O.AKQQZQKQZQQK 4 & ;4 & ;?4;4I;4  J;?4;4I;4  J;??4 4 & ;4I;4  J;?4;4 & ;?4;4I;4  J;??4 4 & ;4I;4  J;?4;4I;4  J;?4;4 & ;??4 0,25 0,25 x 3 (0,75) 2. ;4  4R ?44 ;4  ;4 & 44? 44 &  ;4  ;4  E &  / E &  / Y  2S, 3S 2R, 3S 0,5 x 2 (1,0) Câu 10A(2,0 điểm) 1. !(3!Q E Q & Q  Q / I,qv:"9%J2 Q E Q & Q  Q / ;4  ?4^4; I;4  ;?J & ? I; & 4 Y J & C? / ?4 4 & ?^4; Q  V Nn"QA D α − K"„# 2. O<<3naB„#h "Y< L,!)f* $@245<eq=$".<"‡f*$@2  ;G? ;4 & ?4 4 ?4 ?44 44? ;4 & ?4 aB„#2 Đáp án câu 10 ĐÁP ÁN ĐIỂM 1. ? ?;?;4  ?;?;4  ?;4  ;4 & ?;?;4  ;4  ;?? ? ?; & 4 Y ?;4  ;4 & ?; & 4 Y ; & 4 Y ? ? ?4 ?;4  ?4 ?4 ;4 & ?4 ? ?; & 4 Y ?4 ;4 & ?; & 4 Y ; & 4 Y ? ?; & 4 Y Q E Q & Q  Q / ?; & 4 Y 0,25 x 4 (1,0) 2. ;G? ;4 & ?4 4 ?4 ?44 44? ;4 & ?4 ? ? ?4 4? ?4 ;4 & ?4 4?;4 & ? ?4 4? ;4 & ?4 ?4 4?;4 & ?4 ;4 & ?4 ?4 4? 4? ? ;4 & ?4 ?4 ?4 4? 4? 0,25 x 4 (1,0) .  HƯỚNG DẪN CHẤM ĐỀ THI CHÍNH THỨC MÔN: HOÁ HỌC (Hướng dẫn chấm và biểu điểm gồm có 07 trang) Câu 1:(2,0.  KỲ THI CHỌN HỌC SINH GIỎI LỚP 12 THPT CẤP TỈNH NĂM HỌC 2010 - 2011 