2+<\/sup>.<\/strong><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Cho t\u1eeb t\u1eeb dung d\u1ecbch NH3<\/sub>\u00a0\u0111\u1ebfn d\u01b0 v\u00e0o 3 m\u1eabu th\u1eed, m\u1eabu th\u1eed n\u00e0o c\u00f3 k\u1ebft t\u1ee7a m\u00e0u n\u00e2u \u0111\u1ecf th\u00ec m\u1eabu th\u1eed \u0111\u00f3 ch\u1ee9a ion Fe3+<\/sup><\/p>\nFe3+<\/sup>\u00a0+ 3NH3<\/sub>\u00a0+ 3H2<\/sub>O \u2192 Fe(OH)3<\/sub>\u00a0\u2193 + 3NH4<\/sub>+<\/sup><\/p>\nM\u1eabu th\u1eed n\u00e0o l\u00fac \u0111\u1ea7u xu\u1ea5t hi\u1ec7n k\u1ebft t\u1ee7a m\u00e0u xanh l\u1ee5c, sau \u0111\u00f3 k\u1ebft t\u1ee7a tan ra cho dung d\u1ecbch m\u00e0u xanh th\u1eabm th\u00ec m\u1eabu th\u1eed \u0111\u00f3 ch\u1ee9a ion Cu2+<\/sup><\/p>\nCu2+<\/sup>\u00a0+ 2 NH3<\/sub>\u00a0+ 2H2<\/sub>O \u2192 Cu(OH)2<\/sub>\u00a0\u2193 + 2NH4<\/sub>+<\/sup><\/p>\nCu(OH)2<\/sub>\u00a0\u2193 + 4NH3<\/sub>\u2192 [Cu(NH3<\/sub>)4](OH)2<\/sub><\/p>\nCho dung d\u1ecbch H2<\/sub>SO4<\/sub>\u00a0v\u00e0o m\u1eabu th\u1eed c\u00f2n l\u1ea1i n\u1ebfu c\u00f3 k\u1ebft t\u1ee7a tr\u1eafng, kh\u00f4ng tan trong axit d\u01b0, m\u1eabu th\u1eed \u0111\u00f3 ch\u1ee9a ion Ba2+<\/sup><\/p>\nBa2+<\/sup>\u00a0+ H2<\/sub>SO4<\/sub>\u00a0\u2192 BaSO4<\/sub>\u00a0\u2193 + 2H+<\/sup><\/p>\nB\u00e0i 2 (trang 180 SGK H\u00f3a 12):\u00a0C\u00f3 5 l\u1ecd h\u00f3a ch\u1ea5t kh\u00f4ng nh\u00e3n m\u1ed7i l\u1ecd \u0111\u1ef1ng m\u1ed9t trong c\u00e1c dung d\u1ecbch sau \u0111\u00e2y (n\u1ed3ng \u0111\u1ed9 kho\u1ea3ng 0,1M): NH4<\/sub>Cl, FeCl2<\/sub>, AlCl3<\/sub>, MgCl2<\/sub>, CuCl2<\/sub>. Ch\u1ec9 d\u00f9ng dung d\u1ecbch NaOH th\u00eam v\u00e0o t\u1eebng dung d\u1ecbch c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft d\u00e3y dung d\u1ecbch n\u00e0o sau \u0111\u00e2y?<\/strong><\/p>\nA. 2 dung d\u1ecbch : NH4<\/sub>Cl, CuCl2<\/sub><\/strong><\/p>\nB. 3 dung d\u1ecbch : NH4<\/sub>Cl, MgCl2<\/sub>, CuCl2<\/sub><\/strong><\/p>\nC. 4 dung d\u1ecbch: NH4<\/sub>Cl, AlCl3<\/sub>, MgCl2<\/sub>, CuCl2<\/sub><\/strong><\/p>\nD. c\u1ea3 5 dung d\u1ecbch.<\/strong><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
D\u00f9ng dung d\u1ecbch NaOH cho l\u1ea7n l\u01b0\u1ee3t v\u00e0o t\u1eebng dung d\u1ecbch, c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c t\u1ed1i \u0111a n\u0103m dung d\u1ecbch ch\u1ee9a ion: NH4<\/sub>Cl, FeCl2<\/sub>, AlCl3<\/sub>, MgCl2<\/sub>, CuCl2<\/sub>:<\/p>\n\u2022 NH4<\/sub>Cl cho v\u00e0o dung d\u1ecbch NaOH c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng tho\u00e1t kh\u00ed m\u00f9i khai.<\/p>\n\u2022 MgCl2<\/sub>\u00a0cho v\u00e0o dung d\u1ecbch NaOH c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng xu\u1ea5t hi\u1ec7n k\u1ebft t\u1ee7a tr\u1eafng Mg(OH)2<\/sub><\/p>\n\u2022 FeCl2<\/sub>\u00a0cho v\u00e0o dung d\u1ecbch NaOH c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng xu\u1ea5t hi\u1ec7n k\u1ebft t\u1ee7a tr\u1eafng xanh Fe(OH)2<\/sub><\/p>\n\u2022 AlCl3<\/sub>\u00a0cho v\u00e0o dung d\u1ecbch NaOH c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng xu\u1ea5t hi\u1ec7n k\u1ebft t\u1ee7a tr\u1eafng Al(OH)3<\/sub>\u00a0r\u1ed3i tan trong ki\u1ec1m d\u01b0.<\/p>\n\u2022 CuCl2<\/sub>\u00a0cho v\u00e0o dung d\u1ecbch NaOH c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng xu\u1ea5t hi\u1ec7n k\u1ebft t\u1ee7a xanh l\u01a1 Cu(OH)2<\/sub><\/p>\nCh\u1ecdn: D.<\/p>\n
PTHH:<\/p>\n
NH4<\/sub>Cl + NaOH \u2192 NaCl + NH3<\/sub>\u00a0+ H2<\/sub>O<\/p>\nMgCl2<\/sub>\u00a0+ NaOH \u2192 NaCl + Mg(OH)2<\/sub><\/p>\nCuCl2<\/sub>\u00a0+ NaOH \u2192 NaCl + Cu(OH)2<\/sub><\/p>\nFeCl2<\/sub>\u00a0+ NaOH \u2192 NaCl + Fe(OH)2<\/sub><\/p>\nAlCl3<\/sub>\u00a0+ NaOH \u2192 NaCl + Al(OH)3<\/sub><\/p>\nB\u00e0i 3 (trang 180 SGK H\u00f3a 12):\u00a0C\u00f3 4 \u1ed1ng nghi\u1ec7m kh\u00f4ng nh\u00e3n m\u1ed7i \u1ed1ng \u0111\u1ef1ng m\u1ed9t trong c\u00e1c dung d\u1ecbch sau (n\u1ed3ng \u0111\u1ed9 kho\u1ea3ng 0,1 M) : NaCl, Na2<\/sub>CO3<\/sub>, KHSO4<\/sub>, CH3<\/sub>NH2<\/sub>. Ch\u1ec9 d\u00f9ng gi\u1ea5y qu\u1ef3 t\u00edm cho v\u00e0o t\u1eebng dung d\u1ecbch, quan s\u00e1t s\u1ef1 thay \u0111\u1ed5i m\u00e0u c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft d\u00e3y dung d\u1ecbch n\u00e0o ?<\/strong><\/p>\nA. 1 dung d\u1ecbch NaCl<\/p>\n
B. 2 dung d\u1ecbch NaCl v\u00e0 KHSO4<\/sub><\/p>\nC. 2 dung d\u1ecbch KHSO4<\/sub>\u00a0v\u00e0 CH3<\/sub>NH2<\/sub>.<\/p>\nD. 3 dung d\u1ecbch NaCl, KHSO4<\/sub>\u00a0v\u00e0 Na2<\/sub>CO3<\/sub><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u0110\u00e1p \u00e1n B, C v\u00e0 D.<\/p>\n
B\u00e0i 4 (trang 180 SGK H\u00f3a 12):\u00a0H\u00e3y ph\u00e2n bi\u1ec7t hai dung d\u1ecbch ri\u00eang r\u1ebd sau : (NH4<\/sub>)2<\/sub>S v\u00e0 (NH4<\/sub>)2<\/sub>SO4<\/sub>\u00a0b\u1eb1ng m\u1ed9t thu\u1ed1c th\u1eed .<\/strong><\/p>\nL\u1eddi gi\u1ea3i:<\/strong><\/p>\nCho dung d\u1ecbch Ba(OH)2<\/sub>\u00a0v\u00e0o hai m\u1eabu th\u1eed, m\u1eabu th\u1eed n\u00e0o c\u00f3 kh\u00ed v\u00e0 k\u1ebft t\u1ee7a tr\u1eafng l\u00e0 (NH4<\/sub>)2<\/sub>SO4<\/sub>, ch\u1ec9 c\u00f3 kh\u00ed l\u00e0 (NH4<\/sub>)2<\/sub>S<\/p>\n(NH4<\/sub>)2<\/sub>S + Ba(OH)2<\/sub>\u00a0\u2192 BaS + 2NH3<\/sub>\u00a0\u2191 + 2H2<\/sub>O<\/p>\n(NH4<\/sub>)2<\/sub>SO4<\/sub>\u00a0+ Ba(OH)2<\/sub>\u00a0\u2192 BaSO4<\/sub>\u00a0\u2193 + 2NH3<\/sub>\u00a0\u2191 + 2H2<\/sub>O<\/p>\nB\u00e0i 5 (trang 180 SGK H\u00f3a 12):\u00a0C\u00f3 h\u1ed7n h\u1ee3p kh\u00ed g\u1ed3m SO2<\/sub>, CO2<\/sub>, H2<\/sub>. H\u00e3y ch\u1ee9ng minh s\u1ef1 c\u00f3 m\u1eb7t c\u1ee7a t\u1eebng kh\u00ed trong h\u1ed7n h\u1ee3p \u0111\u00f3. Vi\u1ebft c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c ph\u1ea3n \u1ee9ng .<\/strong><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Cho dung d\u1ecbch brom v\u00e0o h\u1ed7n h\u1ee3p kh\u00ed , th\u1ea5y dung d\u1ecbch brom m\u1ea5t m\u00e0u ch\u1ee9ng t\u1ecf trong h\u1ed7n h\u1ee3p c\u00f3 SO2<\/sub><\/p>\nSO2<\/sub>\u00a0+ Br2<\/sub>\u00a0+ 2H2<\/sub>O \u2192 2HBr + H2<\/sub>SO4<\/sub>.<\/p>\nTh\u00eam ti\u1ebfp dung d\u1ecbch brom v\u00e0o h\u1ed7n h\u1ee3p cho \u0111\u1ebfn khi dung d\u1ecbch Br2<\/sub>\u00a0h\u1ebft b\u1ecb m\u1ea5t m\u00e0u nh\u01b0 v\u1eady h\u1ebft SO2<\/sub>. D\u1eabn h\u1ed7n h\u1ee3p kh\u00ed c\u00f2n l\u1ea1i qua dung d\u1ecbch n\u01b0\u1edbc v\u00f4i trong c\u00f3 d\u01b0 th\u1ea5y c\u00f3 k\u1ebft t\u1ee7a tr\u1eafng ch\u1ee9ng t\u1ecf c\u00f3 CO2<\/sub>.<\/p>\nCO2<\/sub>\u00a0+ Ca(OH)2<\/sub>\u00a0\u2192 CaCO3<\/sub>\u00a0\u2193 + H2<\/sub>O<\/p>\nD\u1eabn kh\u00ed c\u00f2n l\u1ea1i qua b\u00ecnh \u0111\u1ef1ng CuO (m\u00e0u \u0111en) \u0111un n\u00f3ng th\u1ea5y c\u00f3 xu\u1ea5t hi\u1ec7n Cu m\u00e0u \u0111\u1ecf th\u00ec kh\u00ed \u0111\u00f3 l\u00e0 H2<\/sub><\/p>\n\n
<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 180 SGK H\u00f3a 12):\u00a0Tr\u00ecnh b\u00e0y c\u00e1ch nh\u1eadn bi\u1ebft c\u00e1c ion trong c\u00e1c dung d\u1ecbch ri\u00eang r\u1ebd sau: Ba2+, Fe3+, Cu2+. L\u1eddi gi\u1ea3i: Cho t\u1eeb t\u1eeb dung d\u1ecbch NH3\u00a0\u0111\u1ebfn d\u01b0 v\u00e0o 3 m\u1eabu th\u1eed, m\u1eabu th\u1eed n\u00e0o c\u00f3 k\u1ebft t\u1ee7a m\u00e0u n\u00e2u \u0111\u1ecf th\u00ec m\u1eabu th\u1eed \u0111\u00f3 ch\u1ee9a ion Fe3+ Fe3+\u00a0+ 3NH3\u00a0+ 3H2O […]<\/p>\n","protected":false},"author":3,"featured_media":0,"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
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