B\u00e0i 1 (trang 236 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0C\u00f3 5 dung d\u1ecbch h\u00f3a ch\u1ea5t kh\u00f4ng nh\u00e3n, m\u1ed7i dung d\u1ecbch n\u1ed3ng \u0111\u1ed9 kho\u1ea3ng 0.1M c\u1ee7a m\u1ed9t trong c\u00e1c mu\u1ed1i sau: KCl , Ba(HCO_{3<\/sub>)2<\/sub>, K2<\/sub>CO3<\/sub>, K2<\/sub>S, K2<\/sub>SO4<\/sub>. Ch\u1ec9 d\u00f9ng m\u1ed9t dung d\u1ecbch thu\u1ed1c th\u1eed H2<\/sub>SO4<\/sub>\u00a0lo\u00e3ng nh\u1ecf tr\u1ef1c ti\u1ebfp v\u00e0o m\u1ed7i dung d\u1ecbch, th\u00ec c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t t\u1ed1i \u0111a m\u1ea5y dung d\u1ecbch?<\/strong><\/p>\n}

A. 2 dung d\u1ecbch.<\/p>\n

B. 3 dung d\u1ecbch.<\/p>\n

C. 4 dung d\u1ecbch.<\/p>\n

D. C\u1ea3 5 dung d\u1ecbch.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

\u0110\u00e1p \u00e1n\u00a0D<\/b>.<\/p>\n

H_{2<\/sub>SO4<\/sub>\u00a0kh\u00f4ng ph\u1ea3n \u1ee9ng v\u1edbi KCl v\u00e0 K2<\/sub>SO4<\/sub><\/p>\n}

H_{2<\/sub>SO4<\/sub>\u00a0ph\u1ea3n \u1ee9ng v\u1edbi Ba(HCO3<\/sub>)2<\/sub>\u00a0t\u1ea1o k\u1ebft t\u1ee7a v\u00e0 c\u00f3 kh\u00ed bay ra<\/p>\n}

Ba(HCO_{3<\/sub>)2<\/sub>\u00a0+ H2<\/sub>SO4<\/sub>\u00a0\u2192 BaSO4<\/sub>\u00a0\u2193 + 2CO2<\/sub>\u00a0\u2191 + 2H2<\/sub>O<\/p>\n}

H_{2<\/sub>SO4<\/sub>\u00a0t\u1ea1o kh\u00ed kh\u00f4ng m\u00e0u, m\u00f9i th\u1ed1i v\u1edbi K2<\/sub>S<\/p>\n}

H_{2<\/sub>SO4<\/sub>\u00a0+ K2<\/sub>S \u2192 K2<\/sub>SO4<\/sub>\u00a0+ H2<\/sub>S \u2191 m\u00f9i tr\u1ee9ng th\u1ed1i<\/p>\n}

H_{2<\/sub>SO4<\/sub>\u00a0t\u1ea1o kh\u00ed kh\u00f4ng m\u00e0u, kh\u00f4ng m\u00f9i v\u1edbi K2<\/sub>CO3<\/sub><\/p>\n}

H_{2<\/sub>SO4<\/sub>\u00a0+ K2<\/sub>CO3<\/sub>\u00a0\u2192 K2<\/sub>SO4<\/sub>\u00a0+ H2<\/sub>O + CO2<\/sub>\u00a0\u2191<\/p>\n}

D\u00f9ng dung d\u1ecbch Ba(HCO_{3<\/sub>)2<\/sub>\u00a0\u0111\u00e3 nh\u1eadn \u0111\u01b0\u1ee3c cho v\u00e0o 2 dung d\u1ecbch c\u00f2n l\u1ea1i nh\u1eadn ra K2<\/sub>SO4<\/sub>v\u00ec c\u00f3 k\u1ebft t\u1ee7a, c\u00f2n KCl th\u00ec kh\u00f4ng<\/p>\n}

Ba(HCO_{3<\/sub>)2<\/sub>\u00a0+ K2<\/sub>SO4<\/sub>\u00a0\u2192 BaSO4<\/sub>\u00a0\u2193 + 2KHCO3<\/sub><\/p>\n}

B\u00e0i 2 (trang 236 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0H\u00e3y tr\u00ecnh b\u00e0y ph\u01b0\u01a1ng ph\u00e1p h\u00f3a h\u1ecdc \u0111\u1ec3 ph\u00e2n bi\u1ec7t 2 anion CO_{3<\/sub>^{2+<\/sup>\u00a0v\u00e0 SO3<\/sub>2-<\/sup>.<\/strong><\/p>\n}}

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Anion SO_{3<\/sub>^{2-<\/sup>\u00a0l\u00e0m m\u1ea5t m\u00e0u dung d\u1ecbch brom c\u00f2n CO3<\/sub>2-<\/sup>\u00a0th\u00ec kh\u00f4ng.<\/p>\n}}

SO_{3<\/sub>^{2-<\/sup>\u00a0+ Br2<\/sub>\u00a0+ H2<\/sub>O \u2192 SO4<\/sub>2-<\/sup>\u00a0+ 2H+<\/sup>\u00a0+ 2Br–<\/sup><\/p>\n}}

B\u00e0i 3 (trang 236 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0C\u00f3 dung d\u1ecbch ch\u1ee9a c\u00e1c anion NO_{3<\/sub>^{–<\/sup>\u00a0CO3<\/sub>2-<\/sup>\u00a0H\u00e3y n\u00eau c\u00e1ch nh\u1eadn bi\u1ebft t\u1eebng ion trong dung d\u1ecbch \u0111\u00f3. Vi\u1ebft c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc<\/strong><\/p>\n}}

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

L\u1ea5y m\u1ed9t ph\u1ea7n dung d\u1ecbch, nh\u1ecf t\u1eeb t\u1eeb HCl v\u00e0o, d\u1eabn kh\u00ed tho\u00e1t ra v\u00e0o n\u01b0\u1edbc v\u00f4i trong v\u00e0 qua dung d\u1ecbch brom th\u1ea5y n\u01b0\u1edbc v\u00f4i v\u1ea9n \u0111\u1ee5c c\u00f2n dung d\u1ecbch brom kh\u00f4ng \u0111\u1ed5i m\u00e0u<\/p>\n

=> kh\u00ed tho\u00e1t ra l\u00e0 CO_{2<\/sub>\u00a0c\u00f2n trong dung d\u1ecbch ban \u0111\u1ea7u c\u00f3 CO3<\/sub>^{2-<\/sup>.<\/p>\n}}

L\u1ea5y m\u1ed9t ph\u1ea7n dung d\u1ecbch kh\u00e1c th\u00eam v\u00e0 \u0111\u1ecf m\u1ed9t l\u00e1 \u0111\u1ed3ng m\u1ecfng kh\u00f4ng th\u1ea5y x\u1ea3y ra ph\u00e1n \u1ee9ng. Th\u00eam r\u1ea5t t\u1eeb t\u1eeb dung d\u1ecbch H_{2<\/sub>SO4<\/sub>\u00a0v\u00e0o m\u1ed9t ph\u1ea7n kh\u00e1c cho t\u1edbi khi tho\u00e1t h\u1ebft kh\u00ed CO2<\/sub>axit h\u00f3a dung d\u1ecbch b\u00e0ng H2<\/sub>SO4<\/sub>\u00a0r\u1ed3i cho m\u1ed9t l\u00e1 \u0111\u1ed3ng v\u00e0o th\u1ea5y c\u00f3 kh\u00ed kh\u00f4ng m\u00e0u bay ra v\u00e0 h\u00f3a n\u00e2u trong kh\u00f4ng kh\u00ed => c\u00f3 NO3<\/sub>^{–<\/sup><\/p>\n}}

3Cu + 8H^{+<\/sup>\u00a0+2NO_{3<\/sub>–<\/sup>\u00a0\u2192 3Cu2+<\/sup>\u00a0+ 2NO + 4H2<\/sub>O<\/p>\n}}

2NO kh\u00f4ng m\u00e0u + O_{2<\/sub>\u00a0\u2192 2NO2<\/sub>\u00a0m\u00e0u n\u00e2u<\/p>\n}

B\u00e0i 4 (trang 236 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0C\u00f3 dung d\u1ecbch ch\u1ee9a c\u00e1c anion SO_{3<\/sub>^{2-<\/sup>\u00a0, SO4<\/sub>2-<\/sup>. H\u00e3y n\u00eau c\u00e1ch nh\u1eadn bi\u1ebft t\u1eebng ion trong dung d\u1ecbch. Vi\u1ebft c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc<\/strong><\/p>\n}}

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Nh\u1ecf BaCl_{2<\/sub>\u00a0v\u00e0o dung d\u1ecbch cho t\u1edbi khi l\u01b0\u1ee3ng k\u1ebft t\u1ee7a kh\u00f4ng thay \u0111\u1ed5i n\u1eefa. l\u1ecdc l\u1ea5y k\u1ebft t\u1ee7a \u0111em h\u00f2a tan b\u1eb1ng dung d\u1ecbch HCl d\u01b0 th\u1ea5y:<\/p>\n}

– M\u1ed9t ph\u1ea7n k\u1ebft t\u1ee7a c\u00f3 m\u00e0u tr\u1eafng kh\u00f4ng tan trong axit m\u1ea1nh => l\u00e0 BaSO_{4<\/sub><\/p>\n}

– M\u1ed9t ph\u1ea7n k\u1ebft t\u1ee7a tr\u1eafng tan trong axit t\u1ea1o kh\u00ed, d\u1eabn kh\u00ed n\u00e0y qua dung d\u1ecbch brom th\u1ea5y dung d\u1ecbch nh\u1ea1t m\u00e0u => kh\u00ed l\u00e0 SO_{2<\/sub>\u00a0k\u1ebft t\u1ee7a l\u00e0 BaSO3<\/sub>\u00a0v\u00e0 dung d\u1ecbch c\u00f3 SO3<\/sub>^{2+<\/sup><\/p>\n}}

Ba^{2+<\/sup>\u00a0+ SO_{3<\/sub>2-<\/sup>\u00a0\u2192 BaSO3<\/sub><\/p>\n}}

BaSO_{3<\/sub>\u00a0+ 2HCl \u2192 BaCl2<\/sub>\u00a0+ SO2<\/sub>\u00a0+ H2<\/sub>O<\/p>\n}

SO_{2<\/sub>\u00a0+ Br2<\/sub>\u00a0+ 2H2<\/sub>O \u2192 H2<\/sub>SO4<\/sub>\u00a0+ 2HBr<\/p>\n","protected":false},"excerpt":{"rendered":"}

B\u00e0i 1 (trang 236 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0C\u00f3 5 dung d\u1ecbch h\u00f3a ch\u1ea5t kh\u00f4ng nh\u00e3n, m\u1ed7i dung d\u1ecbch n\u1ed3ng \u0111\u1ed9 kho\u1ea3ng 0.1M c\u1ee7a m\u1ed9t trong c\u00e1c mu\u1ed1i sau: KCl , Ba(HCO3)2, K2CO3, K2S, K2SO4. Ch\u1ec9 d\u00f9ng m\u1ed9t dung d\u1ecbch thu\u1ed1c th\u1eed H2SO4\u00a0lo\u00e3ng nh\u1ecf tr\u1ef1c ti\u1ebfp v\u00e0o m\u1ed7i dung d\u1ecbch, th\u00ec c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t […]<\/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":[1306],"tags":[1429,1430],"yoast_head":"\n