2+<\/sup>\u00a0b\u1ecb kh\u1eed.<\/p>\nC. \u1edd c\u1ef1c d\u01b0\u01a1ng, nguy\u00ean t\u1eed Mg b\u1ecb oxi h\u00f3a.<\/p>\n
D. \u1edf c\u1ef1c \u00e2m, nguy\u00ean t\u1eed Mg b\u1ecb kh\u1eed.<\/p>\n
L\u1eddi gi\u1ea3i:<\/strong><\/p>\n\u0110\u00e1p \u00e1n B<\/p>\n
\n
\n
B\u00e0i 2 (trang 170 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0\u0110i\u1ec7n ph\u00e2n m\u1ed9t mu\u1ed1i kim lo\u1ea1i M n\u00f3ng ch\u1ea3y v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng l\u00e0 10A trong th\u1eddi gian 2 gi\u1edd, ng\u01b0\u1eddi ta thu \u0111\u01b0\u1ee3c \u1edf catot 0,373 mol kim lo\u1ea1i M. s\u1ed1 oxi h\u00f3a kim lo\u1ea1i M trong mu\u1ed1i l\u00e0:<\/strong><\/p>\nA. +1<\/p>\n
B. +2<\/p>\n
C. +3<\/p>\n
D. +4<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u0110\u00e1p \u00e1n B<\/p>\n
\n
\n
B\u00e0i 3 (trang 170 sgk H\u00f3a 12 n\u00e2ng cao):\u00a01,24 gam Na2<\/sub>O t\u00e1c d\u1ee5ng v\u1edbi n\u01b0\u1edbc, \u0111\u01b0\u1ee3c 100ml dung d\u1ecbch. N\u1ed3ng \u0111\u1ed9 mol c\u1ee7a ch\u1ea5t trong dung d\u1ecbch l\u00e0 :<\/strong><\/p>\nA. 0,04 M<\/p>\n
B. 0,02 M<\/p>\n
C. 0,4 M<\/p>\n
D. 0,2 M<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u0110\u00e1p \u00e1n C<\/p>\n
\n
\n
B\u00e0i 4 (trang 170 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Trong m\u1ed7i tr\u01b0\u1eddng h\u1ee3p sau \u0111\u00e2y, h\u00e3y d\u1eabn ra m\u1ed9t ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a ph\u1ea3n \u1ee9ng \u0111\u1ec3 minh h\u1ecda :<\/strong><\/p>\na. Nguy\u00ean t\u1eed Mg b\u1ecb oxi h\u00f3a<\/p>\n
b. Ion Mg2+<\/sup>\u00a0b\u1ecb kh\u1eed<\/p>\nc. Ion magie c\u00f3 s\u1ed1 oxi h\u00f3a kh\u00f4ng thay \u0111\u1ed5i<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
a. Mg + FeSO4<\/sub>\u2192 MgSO4<\/sub>\u00a0+ Fe<\/p>\nMg \u2192 Mg2+<\/sup>\u00a0+ 2e<\/p>\nb. MgCl2<\/sub>\u00a0(\u0111pnc)\u2192 Mg + Cl2<\/sub><\/p>\nMg2+<\/sup>\u00a0+ 2e \u2192 Mg<\/p>\nc. 2NaOH + MgCl2<\/sub>\u00a0\u2192 Mg(OH)2<\/sub>\u00a0\u2193 + 2NaCl<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n <\/p>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 170 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Khi \u0111i\u1ec7n ph\u00e2n MgCl2\u00a0n\u00f3ng ch\u1ea3y A. \u1edf c\u1ef1c d\u01b0\u01a1ng, ion Mg2+\u00a0b\u1ecb oxi h\u00f3a B. \u1edf c\u1ef1c \u00e2m, ion Mg2+\u00a0b\u1ecb kh\u1eed. C. \u1edd c\u1ef1c d\u01b0\u01a1ng, nguy\u00ean t\u1eed Mg b\u1ecb oxi h\u00f3a. D. \u1edf c\u1ef1c \u00e2m, nguy\u00ean t\u1eed Mg b\u1ecb kh\u1eed. L\u1eddi gi\u1ea3i: \u0110\u00e1p \u00e1n B B\u00e0i 2 (trang […]<\/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
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