B\u00e0i 1 (trang 145 SGK H\u00f3a 12):<\/b>\u00a0Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c ph\u1ea3n \u1ee9ng trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i sau :<\/p>\n
<\/p>\n
L\u1eddi gi\u1ea3i<\/strong><\/p>\n (1) 4FeS2 + 11O2<\/sub>\u00a0\u2192 2Fe2<\/sub>O3<\/sub>\u00a0+ 8SO2<\/sub><\/p>\n (2) Fe2<\/sub>O3<\/sub>\u00a0+ 6HCl \u2192 2FeCl3<\/sub>\u00a0+ 3H2<\/sub>O<\/p>\n (3) FeCl3<\/sub>\u00a0+ 3NaOH \u2192 Fe(OH)3<\/sub>\u00a0+ 3NaCl<\/p>\n (4) 2Fe(OH)3<\/sub>\u00a0\u2192 Fe2<\/sub>O3<\/sub>\u00a0+ 3H2<\/sub>O.<\/p>\n (5) Fe2<\/sub>O3<\/sub>\u00a0+ 3CO \u2192 2Fe + 3CO2<\/sub>.<\/p>\n (6) FeO + H2<\/sub>SO4<\/sub>\u00a0\u2192 FeSO4<\/sub>\u00a0+ H2<\/sub>O.<\/p>\n (7) FeSO4<\/sub>\u00a0+ Mg \u2192 MgSO4<\/sub>\u00a0+ Fe.<\/p>\n B\u00e0i 2 (trang 145 SGK H\u00f3a 12):\u00a0Cho s\u1eaft t\u00e1c d\u1ee5ng v\u1edbi dung d\u1ecbch H2<\/sub>SO4<\/sub>\u00a0lo\u00e3ng thu \u0111\u01b0\u1ee3c V l\u00edt kh\u00ed H2<\/sub>\u00a0(\u0111ktc), dung d\u1ecbch thu \u0111\u01b0\u1ee3c cho bay h\u01a1i thu \u0111\u01b0\u1ee3c tinh th\u1ec3 FeSO4<\/sub>.7H2<\/sub>O c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 55,6 gam. Th\u1ec3 t\u00edch kh\u00ed H2<\/sub>(\u0111ktc) \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng l\u00e0 :<\/strong><\/p>\n A. 8,19 l\u00edt.<\/p>\n B. 7,33 l\u00edt.<\/p>\n C. 4,48 l\u00edt.<\/p>\n D. 6,23 l\u00edt.<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n \u0110\u00e1p \u00e1n C.<\/p>\n <\/p>\n B\u00e0i 3 (trang 145 SGK H\u00f3a 12):\u00a0Ng\u00e2m m\u1ed9t \u0111inh s\u1eaft n\u1eb7ng 4 gam trong dung d\u1ecbch CuSO4<\/sub>, sau m\u1ed9t th\u1eddi gian l\u1ea5y \u0111inh s\u1eaft ra, s\u1ea5y kh\u00f4, c\u00e2n n\u1eb7ng 4,2857 gam. Kh\u1ed1i l\u01b0\u1ee3ng s\u1eaft tham gia ph\u1ea3n \u1ee9ng l\u00e0 :<\/strong><\/p>\n A. 1,9990 gam.<\/p>\n B. 1,9999 gam.<\/p>\n C. 0,3999 gam.<\/p>\n D. 2,1000 gam.<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n Ch\u1ecdn \u0111\u00e1p \u00e1n B.<\/p>\n Fe + CuSO4<\/sub>\u00a0–> FeSO4<\/sub>\u00a0+ Cu<\/p>\n 56 gam Fe ph\u1ea3n \u1ee9ng t\u1ea1o 64 gam Cu => kh\u1ed1i l\u01b0\u1ee3ng t\u0103ng : 64 \u2013 56 = 8 (gam).<\/p>\n x gam Fe kh\u1ed1i l\u01b0\u1ee3ng t\u0103ng : 4,2857 \u2013 4 = 0,2857(gam).<\/p>\n =>8x = 56 . 0,2857<\/p>\n =>x = 1,9999.<\/p>\n B\u00e0i 4 (trang 145 SGK H\u00f3a 12):\u00a0H\u1ed7n h\u1ee3p A g\u1ed3m FeO, Fe3<\/sub>O4<\/sub>, Fe2<\/sub>O3<\/sub>. Trong h\u1ed7n h\u1ee3p A, m\u1ed7i oxit \u0111\u1ec1u c\u00f3 0,5 mol. Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a h\u1ed7n h\u1ee3p A l\u00e0:<\/strong><\/p>\n A. 231 gam.<\/p>\n B. 232 gam.<\/p>\n C. 233 gam.<\/p>\n D. 234 gam.<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n Ch\u1ecdn \u0111\u00e1p \u00e1n B.<\/p>\n C\u00f3 th\u1ec3 coi 0,5 mol FeO v\u00e0 0,5 mol Fe2<\/sub>O3<\/sub>\u00a0l\u00e0 0,5 mol Fe3<\/sub>O4<\/sub>. V\u1eady c\u1ea3 h\u1ed7n h\u1ee3p c\u00f3 1 mol Fe3<\/sub>O4<\/sub>\u00a0n\u00ean c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng l\u00e0 232g.<\/p>\n B\u00e0i 5 (trang 145 SGK H\u00f3a 12):\u00a0Kh\u1eed ho\u00e0n to\u00e0n 16 gam Fe2<\/sub>O3<\/sub>\u00a0b\u1eb1ng kh\u00ed CO \u1edf nhi\u1ec7t \u0111\u1ed9 cao. Kh\u00ed \u0111i ra sau ph\u1ea3n \u1ee9ng \u0111\u01b0\u1ee3c d\u1eabn v\u00e0o dung d\u1ecbch Ca(OH)2<\/sub>\u00a0d\u01b0. Kh\u1ed1i l\u01b0\u1ee3ng k\u1ebft t\u1ee7a thu \u0111\u01b0\u1ee3c l\u00e0 :<\/strong><\/p>\n A. 15 gam.<\/p>\n B. 20 gam.<\/p>\n C. 25 gam.<\/p>\n D. 30 gam.<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n \u0110\u00e1p \u00e1n D.<\/p>\n <\/p>\n \n Kh\u1ed1i l\u01b0\u1ee3ng k\u1ebft t\u1ee7a l\u00e0 m = 0,3. 100 = 30(g)<\/p>\n B\u00e0i 1 (trang 145 SGK H\u00f3a 12):\u00a0Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c ph\u1ea3n \u1ee9ng trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i sau : L\u1eddi gi\u1ea3i (1) 4FeS2 + 11O2\u00a0\u2192 2Fe2O3\u00a0+ 8SO2 (2) Fe2O3\u00a0+ 6HCl \u2192 2FeCl3\u00a0+ 3H2O (3) FeCl3\u00a0+ 3NaOH \u2192 Fe(OH)3\u00a0+ 3NaCl (4) 2Fe(OH)3\u00a0\u2192 Fe2O3\u00a0+ 3H2O. (5) Fe2O3\u00a0+ 3CO \u2192 2Fe + 3CO2. (6) FeO […]<\/p>\n","protected":false},"author":3,"featured_media":24314,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1305],"tags":[1419,1420],"yoast_head":"\n