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SỞ GIÁO DỤC VÀ ĐÀO TẠO BẮC NINH ĐỀ THI CHỌN HỌC SINH GIỎI CẤP TỈNH NĂM HỌC 2009 - 2010 MÔN THI: HOÁ HỌC - LỚP 9 THCS Ngày thi: 14/4/2010 Thời gian làm bài: 150 phút (không kể thời gian giao đề)     !"#  $%&'()*+ !,' & */%!01    $)23456 ) !"#  $%745$345 !839345 !0:;< )1= =>.:4?)7%@$;'))+1  )1 =A($B$<$$C=  DE5:F2GHIJI"3,,B$ !"= *:;< ;')45$""$&)KI,,B$=L1,,B$-! ,4I,,B$3@$3&'*.C**+.*M345*N45$ "$&)O= =L+2  3P3$C,,B$ !"= =L+:9:9)#*M345$CE*36)E5:F= =L++$*+ !()*$*$&)K) !"#  $ %,4= " A3$C*36J)%J$.DQ*M345=,*+RM< $<$&AM%= :;<*M345$&))M$36= .$&)'),,B$-!3S45$,,B$TI*+ -!,'&()=$6,,B$T45$UMV=W;.1   &$($:;<3Q= =A($B$<$$CAV= =L++$$C-!*$H= " LX$1  :;<HH%Y'!!I)45Z!= :;< ($3&'E5:A$[2HHI)45=\M$('E5:A 745$]^D3+*+!*$IDD!= $_$E5:A4 )1($,`IaCIbU3,,B$-!J745$D")45I M*=%?345)45)1745$+$?c +$$C^-0$de*1  := =L+I1  &:;<HH%= =A($BLfL$C)45I=L+Q$($$&)A= U A3  5:$&Y$?=L)Ag31  *M345$C!Ib$($'1M$363 "h]=\M$('A$[45$!I?4b$Ibg31  M33h=LNM 3$($$&:;<$('g31  IbNM3$($;:i3h"= =A($B$<$:/$C5:$&Y$?A= =A($B$<$$&6$%$%<Ib$<$:/Ia745$.A ĐỀ CHÍNH THỨC ?$<$= ^" 5:$&Y$?F$%$<$:/D!U=3F($,`Ib   345,,B$-!IaC*$$645$?  )45$%%j! I]^E5:$&)2M$CY$??$<$=A($B$<$ $&6$%$%$CF*$9I.*)$<$M$,)$$$C jjjjjjjjjjjjjjjjjjjjjj.jjjjjjjjjjjjjjjjjjjjjj \e'$%) hk!k^-k"k-kk^"GHkU^Jk"F3k] k Vk^U= @I1+ h================================================================================================================================= W(Bh==========================================================W(B h=============================================================== HƯỚNG DẪN CHẤM VÀ ĐÁP ÁN THI CHỌN HSG HÓA 9 NĂM 2010 Câu Ý Nội dung Thang điểm 1 3,0 1. j\l$<$$C3GH  ! ' 3=fh GH  ! ' Z^m'  ! " →GH   ! "   Zm' !  Z^m'  !   (3 2 ) 2 x y n−  GH  ! ' Z'! o t → GHZ'!    GHZ^  ! " →GH   ! "   Z !  Z^  !  U U U U 2. jL$%h 9(3 2 ) 1,5 2 x y n xn − =  3 4 x y ⇒ =  >n'$<$3GH  ! " = U 2 3,0 j>7*M345)Oo?*M345*3691* 36$,4 ! " .=L$%$($:$%;')h JZ ! " →J ! " Z  GHZ ! " →GH ! " Z  J ! " Z-!→J!  Z-  ! "  GH ! " Z-!→GH!  Z-  ! " " J!   o t → J!Z  ! U "GH!  Z!   o t → GH  !  Z"  ! ^ j J$,4GH$4:;<7$&)O3J!I$&) K2IGH=L$% J k  k"P"k^3kp U U  O k GH Z J,4 Z  kDm^="Z^=^"kU""p""  >n'J.=W@'393453M3JGH)DFqr3M 3GHS:;<=L$%h  24 56 3,28 0, 02 56( ) 64( ) 4,24 0,05 0, 02 40 160. 2,40 2 x y x y z x z y z z x   + = =    − + + = ⇒ =     =   + =  U 1. jL+2s3P3$C,,B$ ! " h Z M3$C ! " kZrkZk"3 Z-2s$CMh J k 0, 04 0,1 0, 4 M= U 2. jf9)#*M345$($$&hQJk"^QqQGHkDU]Q U 3. j&)K2GH($,`Ib  ! " l$h GHZ^  ! "  o t → GH   ! "   Z !  Z^  !] "U Z  ! "    o t →  ! " Z !  Z  ! D "" jL+$ !  )3h>k"="UZ"k8"3+= U 3 4,0 1. j\l$<$$C3J  !  $%hQJk 2 80 32 2 16 100 M M n M n = ⇒ = + -t:d5:3kJk^"=<$3!= j($:;<h !Z   o t → Z  !  45$$&)2!$($,`Ib-!  h !Z-!  →-!    Z  ! ZD-!  →-!    Z-!Z"  ! jLH*$$645$M-!    $%M3 M3$C!91$%*M345-!    3h  188. 2,35 3, 025 80 a a a= < ⇒ JM:;n4b$=W@$<$$CM 3-!    =  !$%h (188 18 ). 3, 025 3 80 a n a n+ = ⇒ = = >n'M3-!    =  ! U  U  2. jL$%h  k (3) 2 . 16 3 16 NO a b a b n − − ⇒ = >n'h> -! k"= 2 14 . ( ) 3 16 15 a b a b − = − 3+  4 3,0 1. j($:h    ' !!Z   Z !→   ' !!   Z Z  ! E  5:  A  2h     ' !!    3     Z !  $  3    ' !!   Z   3)A=L$%h Z M)A3h ! k 12,768 8,28 13,2 12. 2. 5, 44 22,4 18 − − = kpZ  Z^$kU""u jAZ-!h    ' !!Z-!→   ' !!-Z  !    ' !!   Z Z-!→   ' !!-Z   Z ! LHh -! kZ  kU3uu LHIe$$%h $3 k  Z$k^PDk3uuu jLauuuuuu45$hkDq  k]q$k"= jv:,`B3n;*M345$%h ZU="kZ]=DZD"kpb = 14,1 j>7M39U33b?M3$39 1t&:;<HH%3hkD=Pk^^^]Q=  U 2. jJ $3 kD"Pkk"ZDkpk=LfL$33  != jJ M k"PUk8"kZ'Z^]kpk'k=LfL$C3     !!= >n'Q*M345$C$($$&)A3h Q)Ak 0, 07.72 .100% 38,18% 13,2 = QHH)Ak 0, 08.86 .100% 52,12% 13,2 = Q$3)Ak 0, 04.32 .100% 9,70% 13,2 =  U U U 5 3,0 1. jW@LfLA3   ' ! r 'r'1≥q'$w≤Z=    ' ! r Z 4 2 y z x + − !   o t → !  Z 2 y   ! LHeH$%h 2 4 4(1 ) 3.( ) 8 4 2 2 2 16 4 12 7 y x x y z y x x y z z x y  =  =     + + − = + ⇔ =     =   =  +   <$:/$&Y$?3 "  D !  U  U 2. j>7A?$<$1A3$$'3$l$HHh ZA3h  j  j  j!!    !! ZA3HHh U       !!        !!        !!         !!  = U 6 4,0 jLHeF:;$%$<$HHI$<$)45⇒<$$CF $%,h xj!!jxyy!j!!jxy xj!!jxyy!j!!jxyZ-!→x!!-Zxy!!-Zxyy!  3 kpxZ^]ZxyZ^]k]^kpxZxyk"Ixyy3   U ≡ Z x3j7xy3j   U kp<$$&6h !!j  j!j  j!!j   U q!  j!!j  j!!j    U q !!j  j!!j   U j  ! Z x3j  7xy3    jkp<$$&6h   j!!j  j!j  j!!j    q !  j!!j  j  j!!j    q   !!j  j!!j    j  ! U U    Lưu ý: @$3$($*($$*.R;c45$M= kkkkkkkkkkkkkzLkkkkkkkkkkkkkkkkkkk -'{dL.mL T 1fjL [K c Ninh . jJ $3 kD"Pkk"ZDkpk=LfL$33  != jJ M k"PUk8"kZ'Z^]kpk'k=LfL$C3     !!= >n'Q*M345$C$($$&)A3h Q)Ak 0, 07.72 .100% 3 8,1 8% 1 3,2 = QHH)Ak 0, 08.86 .100% 5 2,1 2% 1 3,2 = Q$3)Ak 0, 04.32 .100% 9,7 0% 1 3,2 =  U U U 5 3,0 1. jW@LfLA3   ' ! r 'r'1≥q'$w≤Z=    ' ! r Z 4. !0:;< )1= =>.:4?)7%@$;'))+1  )1 =A($B$<$$C=  DE5:F2GHIJI"3 , ,B$ !"= *:;< ;')45$""$&)KI , ,B$=L1 , ,B$-! ,4 I , ,B$3@$3&'*.C**+.*M345*N45$ "$&)O= =L+2  3P3$C , ,B$. J$ ,4 GH$4:;<7$&)O3J!I$&) K2IGH=L$% J k  k"P"k^3kp U U  O k GH Z J ,4 Z  kDm^="Z^=^"kU""p""  >n'J.=W@'393453M3JGH)DFqr3M 3GHS:;<=L$%h  24 56 3,2 8 0, 02 56( ) 64( ) 4,2 4 0,0 5 0, 02 40 160. 2,4 0 2 x y x y z x z y z z x   + = =    − + + = ⇒ =     =   + =  U 1. jL+2s3P3$C , ,B$ ! " h Z

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