B KIM TRA HC SINH GII HểA HC 8 S 4 Bi 1 ! " # ! !$ $ %&' ! %$ ( $ Bi 2 )*+,-*.&+/0*1/2&3*4 5 ( 5% ( 6 )*+,-4 78*9 5: ( 55 6;*+,-<=;>*,-?;@ Bi 3 A9#;*<BCCDEFG=78*HFFBCCD EIG&J&1CCDB8*K&=HL5MG6 N;?;?B=;"*/*B;>*DOOB=17P&4 CCD $ FG&1CCD:-$ K&=5QG6R&D 6 Bi 4 a) Chia một lợng oxít sắt làm hai phần bằng nhau. Để hoà tan hết phần I phải dùng 0,45 mol axít HCl. Cho một luồng khí CO d đi qua phần II nung nóng, phản ứng xong thu đợc 8,4 g Fe. Tìm công thức hoá học của sắt oxít nói trên. b) S4#L(5T1:KB ( 7? &1U5IV;"* %&/6)*+,-7?V?AAWB/0* 149;T1:6 N;?;?B=B*+>/*B;>*7?;B=1CCCD E ( HM5LMG&1/VE7?BCCDRX;&K&=AWB 4:E ( K&=AWB4E ( C6YV5*+, -:E ( :E ( E 6 Bi 5 ;H5HLMBT1*/*B;>*E5ZC[78*MU5LMB8 &1CCDR7?HF5FIV/V;%&/6YVK&=AWB 9;CCDR6 R?CCD: (5 \?CCDE6Y<BHMFBCCD\ 7?;0-HFFBCCDR5/9#&]&11/+4;0? L5IB6^>*<BHFFBCCD\7?;05/9#&]1/+4; 0?HF5UB6R&DK&=B;4R5*+,-",#;?;?6 Z?* G:E ( &_,-78*  `a*,bBBCCE ( 5BE ( cHM5LMGBX :-c"B; (: E ( →  (:E ( E   %H " "d( " "d(   0*1CC,-cBHFI"e(F"d(cBUI"c  `f;GE ( CcG:E ( ;CC,-<  HFFUI%  (  M5F% + − x x 6Q(6HFFc HFFUI% HFF6HLF +x x cg"cF5FQ%B;XcHFQ5FLQ HOÁ HỌC 8/4 Z?*H SA8?W6h]W )i./V2"*'/2/V )j;/2/V]B'*+"k49#78*2"*8*]Aj;/2/V %JV4/V2"*i*+BHdMNJV4**+BdM5;?*B=A*.D *<;C;&0/V*6 Z?*     0 t →         ↑  (  0 t → (  ↑ % (    0 t →   ↑          %,-;17?,-2"*;/b   :   ( :  %,-+7?,-2"*;/b     %,-+7?,-2"*;/b     %,-+7?,-2"*;/b Z?*( YP*J-Gc ct dd m m "HFFG a*/0*14CCDA9#?"B B  c   G IG HFF I%  HFFG HFFG dd dd C xm x gam= = →B H c H H G F F6 HFFG HFF dd dd C xm xx x= = jCCD( eB CC( cB CCH B CC c"HFF eB ( cB H B  cF6I →G CC( c ( ( HFFG ct dd m x m →HL6Mc F6 I HFF HFF x x x + + →F6HLM%"HFFcF6I→"c(IF%B Z?*   cF5MB;6 l&D*/*B;*N+576  B;%M5F B;%M5F  %Z E = = E   → E   """F5M"%B; Z   → Z%     ####%B; ("H(L#cH5HLM F5M"#cF5M %GHI U5FLM5MUHLM5H HFF6F6M5F G E = −+ =  %GLM5(I U5FLM5MUHLM5H HFF6HLH6M5F G  %Z = −+ = . B KIM TRA HC SINH GII HểA HC 8 S 4 Bi 1 ! " # ! !$ $ %&' ! %$ ( $ Bi 2 )*+,-*.&+/0*1/2&3 *4 5 ( 5% ( 6 )*+, -4 78* 9 5: ( 55 6;*+,-<=;>*,-?;@ Bi. `f;GE ( CcG:E ( ;CC,-<  HFFUI%  (  M5F% + − x x 6Q(6HFFc HFFUI% HFF6HLF +x x cg"cF5FQ%B;XcHFQ5FLQ HOÁ HỌC 8/ 4 Z?*H SA 8 ?W6h]W )i./V2"*'/2/V )j;/2/V]B'*+"k 4 9# 78* 2"* 8 *]Aj;/2/V %JV 4 /V2"*i*+BHdMNJV 4 **+BdM5;?*B=A*.D *<;C;&0/V*6 Z?* . S4#L(5T1:KB ( 7? &1U5IV;"* %&/6)*+,-7?V?AAWB/0* 149 ;T1:6 N;?;?B=B*+>/*B;>*7?;B=1CCCD E ( HM5LMG&1/VE7?BCCDRX;&K&=AWB 4: E ( K&=AWB4E ( C6YV5*+, -:E ( :E ( E 6 Bi 5 ;H5HLMBT1*/*B;>*E5ZC[ 78* MU5LMB8 &1CCDR7?HF5FIV/V;%&/6YVK&=AWB 9;CCDR6 R?CCD: (5 ?CCDE6Y<BHMFBCCD 7?;0-HFFBCCDR5/9#&]&11/ +4; 0? L5IB6^>*<BHFFBCCD7?;05/9#&]1/ +4; 0?HF5UB6R&DK&=B;4R5*+,-",#;?;?6 Z?*