B\u00e0i 1 (trang 239 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Kh\u00ed CO_{2<\/sub>\u00a0c\u00f3 l\u1eabn t\u1ea1p ch\u1ea5t l\u00e0 kh\u00ed HCl. \u0110\u1ec3 lo\u1ea1i tr\u1eeb t\u1ea1p ch\u1ea5t HCl \u0111\u00f3 n\u00ean cho kh\u00ed CO2<\/sub>\u00a0\u0111i qua dung d\u1ecbch n\u00e0o sau \u0111\u00e2y t\u1ed1t nh\u1ea5t?<\/strong><\/p>\n}

A. Dung d\u1ecbch NaOH d\u01b0.<\/p>\n

B. Dung d\u1ecbch NaHCO_{3<\/sub>\u00a0b\u00e3o h\u00f2a d\u01b0.<\/p>\n}

C. Dung d\u1ecbch Na_{2<\/sub>CO3<\/sub>\u00a0d\u01b0.<\/p>\n}

D. Dung d\u1ecbch AgNO_{3<\/sub>\u00a0d\u01b0.<\/p>\n}

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

\u0110\u00e1p \u00e1n B<\/p>\n

Ph\u01b0\u01a1mg \u00e1n A kh\u00f4ng ch\u1ecdn v\u00ec NaOH gi\u1eef l\u1ea1i c\u1ea3 CO_{2<\/sub>\u00a0v\u00e0 HCl.<\/p>\n}

Ph\u01b0\u01a1ng \u00e1n C kh\u00f4ng ch\u1ecdn v\u00ec Na_{2<\/sub>CO3<\/sub>\u00a0c\u00f3 th\u1ec3 ph\u1ea3n \u1ee9ng v\u1edbi CO2<\/sub><\/p>\n}

CO_{2<\/sub>+ Na2<\/sub>CO3<\/sub>\u00a0\u2192 2NaHCO3<\/sub><\/p>\n}

Ph\u01b0\u01a1ng \u00e1n D kh\u00f4ng ch\u1ecdn v\u00ec AgNO_{3<\/sub>\u00a0l\u00e0 ch\u1ea5t r\u1ea5t \u0111\u1eaft ti\u1ec1n, kh\u00f4ng kinh t\u1ebf.<\/p>\n}

B\u00e0i 2 (trang 239 sgk H\u00f3a 12 n\u00e2ng cao):<\/b>\u00a0C\u00f3 th\u1ec3 d\u00f9ng dung d\u1ecbch n\u01b0\u1edbc v\u00f4i trong \u0111\u1ec3 ph\u00e2n bi\u1ec7t hai kh\u00ed CO_{2<\/sub>\u00a0v\u00e0 SO2<\/sub>\u00a0\u0111\u01b0\u1ee3c kh\u00f4ng? T\u1ea1i sao?<\/p>\n}

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

Kh\u00f4ng th\u1ec3 d\u00f9ng Ca(OH)_{2<\/sub>\u00a0\u0111\u1ec3 ph\u00e2n bi\u1ec7t CO2<\/sub>\u00a0v\u00e0 SO2<\/sub>\u00a0do ch\u00fang \u0111\u1ec1u l\u00e0 oxit axit. \u0111\u1ec1u t\u1ea1o k\u1ebft t\u1ee7a m\u00e0u tr\u1eafng v\u1edbi Ca(OH)2<\/sub><\/p>\n}

KCO_{2<\/sub>\u00a0+ Ca(OH)2<\/sub>\u00a0\u2192 CaCO3<\/sub>\u00a0\u2193 + H2<\/sub>O<\/p>\n}

KSO_{2<\/sub>\u00a0+ Ca(OH)2<\/sub>\u00a0\u2192 CaSO3<\/sub>\u00a0\u2193 + H2<\/sub>O<\/p>\n}

B\u00e0i 3 (trang 239 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Cho h\u1ed7n h\u1ee3p 2 kh\u00ed CO_{2<\/sub>\u00a0v\u00e0 SO2<\/sub>. H\u00e3y tr\u00ecnh b\u00e0y c\u00e1ch t\u00e1ch \u0111\u1ed3ng th\u1eddi nh\u1eadn bi\u1ebft s\u1ef1 c\u00f3 m\u1eb7t t\u1eebng kh\u00ed trong h\u1ed7n h\u1ee3p \u0111\u00f3. Vi\u1ebft c\u00e1c ph\u01b0cmg tr\u00ecnh h\u00f3a h\u1ecdc.<\/strong><\/p>\n}

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

Chia h\u1ed7n h\u1ee3p kh\u00ed kh\u00f4ng m\u00e0u l\u00e0m 2 ph\u1ea7n. Ph\u1ea7n 1 d\u1eabn qua dung d\u1ecbch brom du th\u1ea5y brom b\u1ecb nh\u1ea1t m\u00e0u v\u00e0 c\u00f3 kh\u00ed bay ra. Ph\u1ea7n 2 d\u1eabn qua dung d\u1ecbch n\u01b0\u1edbc v\u00f4i trong d\u01b0 th\u1ea5y kh\u00ed b\u1ecb h\u1ea5p th\u1ee5 ho\u00e0n to\u00e0n t\u1ea1o k\u1ebft t\u1ee7a m\u00e0u tr\u1eafng<\/p>\n

=> Trong h\u1ed7n h\u1ee3p kh\u00ed c\u00f3 m\u1ed9t kh\u00ed kh\u00f4ng l\u00e0m m\u1ea5t m\u00e0u dung d\u1ecbch brom nh\u01b0ng l\u00e0m \u0111\u1ee5c n\u01b0\u1edbc v\u00f4i trong, c\u00f3 m\u1ed9t kh\u00ed v\u1eeba l\u00e0m \u0111\u1ee5c n\u01b0\u1edbc v\u00f4i trong v\u1eeba l\u00e0m m\u1ea5t m\u00e0u d\u01b0ng d\u1ecbch brom => Hai kh\u00ed l\u00e0 CO_{2<\/sub>\u00a0v\u00e0 SO2<\/sub><\/p>\n}

CO_{2<\/sub>\u00a0+ Ca(OH)2<\/sub>\u00a0\u2192 CaCO3<\/sub>\u00a0\u2193 + H2<\/sub>O<\/p>\n}

SO_{2<\/sub>\u00a0+ Ca(OH)2<\/sub>\u00a0\u2192 CaSO3<\/sub>\u00a0\u2193 + H2<\/sub>O<\/p>\n}

SO_{2<\/sub>\u00a0+ Br2<\/sub>\u00a0+ 2H2<\/sub>O \u2192 H2<\/sub>SO4<\/sub>\u00a0+ 2HBr<\/p>\n}

B\u00e0i 4 (trang 239 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Ch\u1ecdn thu\u1ed1c th\u1eed th\u00edch h\u1ee3p \u0111\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c c\u1eb7p ch\u1ea5t sau \u0111\u00e2y:<\/strong><\/p>\n

a. FeS v\u00e0 FeCO_{3<\/sub>.<\/strong><\/p>\n}

b. Na_{2<\/sub>SO4<\/sub>\u00a0v\u00e0 Na2<\/sub>SO3<\/sub>.<\/strong><\/p>\n}

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

a, FeS v\u00e0 FeCO_{3<\/sub><\/p>\n}

Thu\u1ed1c th\u1eed l\u00e0 dung d\u1ecbch HCl v\u00e0 gi\u1ea5y tr\u1eafng t\u1ea9m Pb(NO_{3<\/sub>)2<\/sub>\u00a0Nh\u1ecf dung d\u1ecbch HCl v\u00e0o hai ch\u1ea5t, \u0111\u1eb7t tr\u00ean mi\u1ec7ng hai \u1ed1ng nghi\u1ec7m hai b\u0103ng gi\u1ea5y tr\u1eafng t\u1ea9m dung d\u1ecbch Pb(NO3<\/sub>)2<\/sub><\/p>\n}

– N\u1ebfu l\u00e0 FeS b\u0103ng gi\u1ea5y h\u00f3a \u0111en: FeS + 2HC1 \u2192 FeCl_{2<\/sub>\u00a0+ H2<\/sub>S \u2191<\/p>\n}

H_{2<\/sub>S + Pb(NO3<\/sub>)2<\/sub>\u00a0\u2192 PbS \u2193 \u0111en + 2HNO3<\/sub><\/p>\n}

– N\u1ebfu l\u00e0 FeCO_{3<\/sub>\u00a0b\u0103ng gi\u1ea5y kh\u00f4ng chuy\u1ec3n m\u00e0u<\/p>\n}

FeCO_{3<\/sub>\u00a0+ 2HCl\u2192 FeCl2<\/sub>\u00a0+ CO2<\/sub>\u00a0+ H2<\/sub>O<\/p>\n}

b, Na_{2<\/sub>SO4<\/sub>\u00a0v\u00e0 Na2<\/sub>SO3<\/sub>:<\/p>\n}

Na_{2<\/sub>SO3<\/sub>\u00a0l\u00e0m m\u1ea5t m\u00e0u dung d\u1ecbch brom c\u00f2n Na2<\/sub>SO4<\/sub>\u00a0th\u00ec kh\u00f4ng.<\/p>\n}

Na_{2<\/sub>SO3<\/sub>\u00a0+ Br2<\/sub>n\u00e2u \u0111\u1ed5 + H2<\/sub>O \u2192 Na2<\/sub>SO4<\/sub>\u00a0+ 2HBr kh\u00f4ng m\u00e0u<\/p>\n}

 <\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

B\u00e0i 1 (trang 239 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Kh\u00ed CO2\u00a0c\u00f3 l\u1eabn t\u1ea1p ch\u1ea5t l\u00e0 kh\u00ed HCl. \u0110\u1ec3 lo\u1ea1i tr\u1eeb t\u1ea1p ch\u1ea5t HCl \u0111\u00f3 n\u00ean cho kh\u00ed CO2\u00a0\u0111i qua dung d\u1ecbch n\u00e0o sau \u0111\u00e2y t\u1ed1t nh\u1ea5t? A. Dung d\u1ecbch NaOH d\u01b0. B. Dung d\u1ecbch NaHCO3\u00a0b\u00e3o h\u00f2a d\u01b0. C. Dung d\u1ecbch Na2CO3\u00a0d\u01b0. D. Dung d\u1ecbch AgNO3\u00a0d\u01b0. L\u1eddi […]<\/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