B\u00e0i 1 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Trong pin \u0111i\u1ec7n h\u00f3a, s\u1ef1 oxi h\u00f3a<\/strong><\/p>\n A. Ch\u1ec9 x\u1ea3y ra \u1edf c\u1ef1c \u00e2m<\/p>\n B. Ch\u1ec9 x\u1ea3y ra \u1edf c\u1ef1c d\u01b0\u01a1ng<\/p>\n C. X\u1ea3y ra \u1edf c\u1ef1c \u00e2m v\u00e0 c\u1ef1c d\u01b0\u01a1ng<\/p>\n D. Kh\u00f4ng x\u1ea3y ra \u1edf c\u1ef1c \u00e2m v\u00e0 c\u1ef1c d\u01b0\u01a1ng<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n \u0110\u00e1p \u00e1n B<\/p>\n B\u00e0i 2 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0C\u1eb7p ch\u1ea5t n\u00e0o sau \u0111\u00e2y tham gia ph\u1ea3n \u1ee9ng trong pin \u0111i\u1ec7n h\u00f3a Zn-Cu? A. Zn2+<\/sup>\u00a0+ Cu2+<\/sup>\u00a0B. Zn2+<\/sup>\u00a0+ Cu C. Zn + Cu2+<\/sup>\u00a0D. Zn + Cu<\/strong><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n \u0110\u00e1p \u00e1n C<\/p>\n B\u00e0i 3 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Cho c\u00e1c kim lo\u1ea1i : Na, Mg, Al, Cu, Ag. H\u00e3y vi\u1ebft c\u00e1c c\u1eb7p oxi h\u00f3a \u2013 kh\u1eed t\u1ea1o b\u1edfi c\u00e1c kim lo\u1ea1i \u0111\u00f3 v\u00e0 s\u1eafp x\u1ebfp ch\u00fang theo th\u1ee9 t\u1ef1 gi\u1ea3m d\u1ea7n t\u00ednh oxi h\u00f3a<\/strong><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n Chi\u1ec1u gi\u1ea3m d\u1ea7n t\u00ednh oxi h\u00f3a, t\u0103ng d\u1ea7n t\u00ednh kh\u1eed :<\/p>\n Ag+<\/sup>\/Ag ; Cu2+<\/sup>\/Cu ; Al3+<\/sup>\/Al ; Mg2+<\/sup>\/Mg ; Na+<\/sup>\/Na<\/p>\n B\u00e0i 4 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0C\u00f3 nh\u1eefng pin \u0111i\u1ec7n h\u00f3a \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o b\u1edfi c\u00e1c c\u1eb7p oxi h\u00f3a \u2013 kh\u1eed sau :<\/strong><\/p>\n 1) Pb2+<\/sup>\u00a0\/Pb v\u00e0 Fe2+<\/sup>\/Fe<\/p>\n 2) Ag2+<\/sup>\u00a0\/Ag v\u00e0 Fe2+<\/sup>\/Fe<\/p>\n 3) Ag+<\/sup>\u00a0\/Ag v\u00e0 Pb2+<\/sup>\u00a0\/Pb<\/p>\n H\u00e3y cho bi\u1ebft :<\/p>\n a. D\u1ea5u v\u00e0 t\u00ean c\u1ee7a c\u00e1c \u0111i\u1ec7n c\u1ef1c trong m\u1ed7i pin \u0111i\u1ec7n h\u00f3a<\/p>\n b. Nh\u1eefng ph\u1ea3n \u1ee9ng x\u1ea3y ra \u1edf c\u00e1c \u0111i\u1ec7n c\u1ef1c v\u00e0 ph\u1ea3n \u1ee9ng oxi h\u00f3a \u2013 kh\u1eed trong m\u1ed7i pin \u0111i\u1ec7n h\u00f3a<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n 1, Ph\u1ea3n \u1ee9ng trong pin \u0111i\u1ec7n h\u00f3a : Fe + Pb2+<\/sup>\u00a0\u2192 Fe2+<\/sup>\u00a0+ Pb<\/p>\n Fe \u2192 Fe2+<\/sup>\u00a0+ 2e Fe : C\u1ef1c \u00e2m, anot<\/p>\n Pb2+<\/sup>\u00a0+ 2e \u2192 Pb Pb : C\u1ef1c d\u01b0\u01a1ng, catot<\/p>\n 2, Ph\u1ea3n \u1ee9ng trong pin \u0111i\u1ec7n h\u00f3a : Fe + 2Ag+ \u2192 Fe2+<\/sup>\u00a0+ 2Ag<\/p>\n Fe \u2192 Fe2+<\/sup>\u00a0+ 2e Fe : C\u1ef1c \u00e2m, anot<\/p>\n Ag+<\/sup>\u00a0+ e \u2192 Ag Ag : C\u1ef1c d\u01b0\u01a1ng, catot<\/p>\n 3, Ph\u1ea3n \u1ee9ng trong pin \u0111i\u1ec7n h\u00f3a : Pb + 2Ag+ \u2192 Pb\u00a02+<\/sup>\u00a0+ 2Ag<\/p>\n Pb \u2192 Pb\u00a02+<\/sup>\u00a0+ 2e Pb : C\u1ef1c \u00e2m, anot<\/p>\n Ag+<\/sup>\u00a0+ e \u2192 Ag Ag : C\u1ef1c d\u01b0\u01a1ng, catot<\/p>\n B\u00e0i 5 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng chu\u1ea9n c\u1ee7a pin \u0111i\u1ec7n h\u00f3a Sn-Ag l\u00e0 :<\/strong><\/p>\n A. 0,66V<\/p>\n B. 0,79V<\/p>\n C. 0,94V<\/p>\n D. 1,09V<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n \u0110\u00e1p \u00e1n C<\/p>\n B\u00e0i 6 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0H\u00e3y cho bi\u1ebft chi\u1ec1u c\u1ee7a ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc x\u1ea3y ra gi\u1eefa c\u00e1c c\u1eb7p oxi h\u00f3a kh\u1eed : Ag+\/Ag; Al3+\/Al v\u00e0 2H+\/H2<\/sub>. Gia\u1ec9 th\u00edch v\u00e0 vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc<\/strong><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n C\u1eb7p Ag+<\/sup>\/Ag v\u00e0 Al3+<\/sup>\/Al<\/p>\n Eo<\/sup>Al3+<\/sup>\/Al<\/sub>\u00a0= -1,66 (V)<\/p>\n Eo<\/sup>Ag+<\/sup>\/Ag<\/sub>\u00a0= 0,8 (V)<\/p>\n Chi\u1ec1u c\u1ee7a ph\u1ea3n \u1ee9ng :<\/p>\n Al + 3Ag+<\/sup>\u00a0\u2192 Al3+<\/sup>\u00a0+ 3Ag<\/p>\n C\u1eb7p Ag+<\/sup>\/Ag v\u00e0 2H+<\/sup>\/H2<\/sub><\/p>\n Eo<\/sup>Ag+<\/sup>\/Ag<\/sub>\u00a0= 0,8 (V); Eo<\/sup>2H+<\/sup>\/H2<\/sub>\u00a0= 0<\/p>\n => Chi\u1ec1u c\u1ee7a ph\u1ea3n \u1ee9ng : H2<\/sub>\u00a0+ 2Ag+<\/sup>\u00a0\u2192 2H+<\/sup>\u00a0+ 2Ag<\/p>\n C\u1eb7p Al3+<\/sup>\/Al v\u00e0 2H+<\/sup>\/H2<\/sub>\u00a0Eo<\/sup>Al3+<\/sup>\/Al<\/sub>\u00a0= -1,66 (V); Eo<\/sup>2H+<\/sup>\/H2<\/sub>\u00a0= 0<\/p>\n => Chi\u1ec1u c\u1ee7a ph\u1ea3n \u1ee9ng : 2Al + 6H+<\/sup>\u00a0\u2192 2Al\u00a03+<\/sup>\u00a0+ 3H2<\/sub><\/p>\n B\u00e0i 7 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):<\/b>\u00a0Bi\u1ebft ph\u1ea3n \u1ee9ng oxi h\u00f3a \u2013 kh\u1eed x\u1ea3y ra trong m\u1ed9t pin \u0111i\u1ec7n h\u00f3a l\u00e0 :<\/p>\n Fe + Ni2+<\/sup>\u00a0\u2192 Ni + Fe2+<\/sup><\/p>\n a. H\u00e3y x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m c\u1ee7a pin \u0111i\u1ec7n h\u00f3a<\/p>\n b. Vi\u1ebft c\u00e1c ph\u1ea3n \u1ee9ng oxi h\u00f3a v\u00e0 ph\u1ea3n \u1ee9ng kh\u1eed x\u1ea3y ra tr\u00ean m\u1ed7i \u0111i\u1ec7n c\u1ef1c<\/p>\n c. T\u00ednh su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng chu\u1ea9n c\u1ee7a pin \u0111i\u1ec7n h\u00f3a<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n B\u00e0i 7 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Bi\u1ebft ph\u1ea3n \u1ee9ng oxi h\u00f3a \u2013 kh\u1eed x\u1ea3y ra trong m\u1ed9t pin \u0111i\u1ec7n h\u00f3a l\u00e0 :<\/strong><\/p>\n Fe + Ni2+<\/sup>\u00a0\u2192 Ni + Fe2+<\/sup><\/p>\n a. H\u00e3y x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec7n c\u1ef1c d\u01b0\u01a1ng v\u00e0 \u00e2m c\u1ee7a pin \u0111i\u1ec7n h\u00f3a<\/p>\n b. Vi\u1ebft c\u00e1c ph\u1ea3n \u1ee9ng oxi h\u00f3a v\u00e0 ph\u1ea3n \u1ee9ng kh\u1eed x\u1ea3y ra tr\u00ean m\u1ed7i \u0111i\u1ec7n c\u1ef1c<\/p>\n c. T\u00ednh su\u1ea5t \u0111i\u1ec7n \u0111\u1ed9ng chu\u1ea9n c\u1ee7a pin \u0111i\u1ec7n h\u00f3a<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n Fe + Ni2+<\/sup>\u00a0\u2192 Fe2+<\/sup>\u00a0+ Ni<\/p>\n a. C\u1ef1c \u00e2m (anot) n\u01a1i x\u1ea3y ra s\u1ef1 oxi h\u00f3a => Fe l\u00e0 c\u1ef1c \u00e2m<\/p>\n C\u1ef1c d\u01b0\u01a1ng (catot) n\u01a1i x\u1ea3y ra s\u1ef1 kh\u1eed => Ni l\u00e0 c\u1ef1c d\u01b0\u01a1ng<\/p>\n b. Fe \u2192 Fe2+<\/sup>\u00a0+ 2e : C\u1ef1c (-) ; Ni2+<\/sup>\u00a0+ 2e \u2192 Ni : C\u1ef1c (+)<\/p>\n c. Eo<\/sup>p\u0111h<\/sub>= Eo<\/sup>Fe2+<\/sup>\/Fe<\/sub>\u00a0= -0,23 \u2013 (-0,44) = +0,21 V<\/p>\n B\u00e0i 8 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0T\u00ednh th\u1ebf \u0111i\u1ec7n c\u1ef1c chu\u1ea9n Eo<\/sup>\u00a0c\u1ee7a nh\u1eefng c\u1eb7p oxi h\u00f3a \u2013 kh\u1eed sau :<\/strong><\/p>\n a) Eo<\/sup>(Cr3+<\/sup>\/Cr)<\/p>\n b) Eo<\/sup>(Mn2+<\/sup>\/Mn)<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n a.Eo<\/sup>Cr-Ni<\/sub>\u00a0= +0,51 = Eo<\/sup>Ni2+<\/sup>\/Ni<\/sub>\u00a0– Eo<\/sup>Cr3+<\/sup>\/Cr<\/sub>\u00a0=> Eo<\/sup>Cr3+<\/sup>\/Cr<\/sub>\u00a0= -0,26 \u2013 0,51 = -0,77 V.<\/p>\n b. Eo<\/sup>Cd-Mn<\/sub>\u00a0= +0,79 = Eo<\/sup>Mn2+<\/sup>)\/Mn<\/sub>\u00a0– Eo<\/sup>Cd2+<\/sup>\/Cd<\/sub>\u00a0=> Eo<\/sup>Mn2+<\/sup>\/Mn<\/sub>\u00a0= 0,79 +(-0,4) = -0,39 V.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":" B\u00e0i 1 (trang 122 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Trong pin \u0111i\u1ec7n h\u00f3a, s\u1ef1 oxi h\u00f3a A. Ch\u1ec9 x\u1ea3y ra \u1edf c\u1ef1c \u00e2m B. Ch\u1ec9 x\u1ea3y ra \u1edf c\u1ef1c d\u01b0\u01a1ng C. X\u1ea3y ra \u1edf c\u1ef1c \u00e2m v\u00e0 c\u1ef1c d\u01b0\u01a1ng D. Kh\u00f4ng x\u1ea3y ra \u1edf c\u1ef1c \u00e2m v\u00e0 c\u1ef1c d\u01b0\u01a1ng L\u1eddi gi\u1ea3i: \u0110\u00e1p \u00e1n B B\u00e0i 2 […]<\/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":[1436,1435],"yoast_head":"\n