\n
a. Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a ph\u1ea3n \u1ee9ng v\u00e0 cho bi\u1ebft vai tr\u00f2 c\u00e1c ch\u1ea5t tham gia ph\u1ea3n \u1ee9ng.<\/p>\n
b. X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt sau ph\u1ea3n \u1ee9ng.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
2AgNO3<\/sub>\u00a0+ Cu \u2192 Cu(NO3<\/sub>)2<\/sub>\u00a0+ 2Ag<\/p>\nPh\u01b0\u01a1ng tr\u00ecnh ion thu g\u1ecdn : Cu + 2Ag+<\/sub>\u00a0\u2192 Cu2+<\/sup>\u00a0+ 2Ag \u2193<\/p>\n2AgNO3<\/sub>\u00a0+ Cu \u2192 Cu(NO3<\/sub>)2<\/sub>\u00a0+ 2Ag<\/p>\nS\u1ed1 mol AgNO3<\/sub>\u00a0l\u00e0 n_AgNO3<\/sub>= 4\/100 x 17\/100 x 250\/170 = 0,01 (mol)<\/p>\nKh\u1ed1i l\u01b0\u1ee3ng Ag mAg<\/sub>\u00a0= 0,01.108 = 1,08 (g)<\/p>\nKh\u1ed1i l\u01b0\u1ee3ng v\u1eadt sau ph\u1ea3n \u1ee9ng = 10 + 0,01 x 108 \u2013 0,005 x 64 = 10,76 g<\/p>\n
B\u00e0i 3 (trang 103 SGK H\u00f3a 12):\u00a0\u0110\u1ec3 kh\u1eed ho\u00e0n to\u00e0n 23,2 gam m\u1ed9t oxit kim lo\u1ea1i c\u1ea7n d\u00f9ng 8,96 l\u00edt H2<\/sub>\u00a0(\u0111ktc). Kim lo\u1ea1i \u0111\u00f3 l\u00e0 kim lo\u1ea1i n\u00e0o sau \u0111\u00e2y?<\/strong><\/p>\nA. Mg.<\/p>\n
B. Cu.<\/p>\n
C. Fe.<\/p>\n
D. Cr.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u0110\u00e1p \u00e1n C.<\/p>\n
G\u1ecdi c\u00f4ng th\u1ee9c c\u1ee7a oxit kim lo\u1ea1i l\u00e0 Mx<\/sub>Oy<\/sub><\/p>\nS\u1ed1 mol H2<\/sub>\u00a0l\u00e0 nH2<\/sub>\u00a0= 8,96\/22,4 = 0,4(mol)<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-3-trang-103-sgk-hoa-12.png\")
<\/p>\n
Nh\u01b0 v\u1eady :<\/p>\n
Mx + 16y = 58y<\/p>\n
Mx = 42y<\/p>\n
\u2192 x\/y = 42\/M<\/p>\n
Gi\u00e1 tr\u1ecb th\u1ecfa m\u00e3n : M = 56; x = 3; y = 4<\/p>\n
Kim lo\u1ea1i l\u00e0 Fe v\u00e0 c\u00f4ng th\u1ee9c oxit l\u00e0 Fe3<\/sub>O4<\/sub><\/p>\nB\u00e0i 4 (trang 103 SGK H\u00f3a 12):\u00a0Cho 9,6 gam b\u1ed9t kim lo\u1ea1i M v\u00e0o 500ml dung d\u1ecbch HCl 1M, sau ph\u1ea3n \u1ee9ng k\u1ebft th\u00fac thu \u0111\u01b0\u1ee3c 5,376 (l\u00edt) H2<\/sub>\u00a0(\u0111ktc). Kim lo\u1ea1i M l\u00e0 kim lo\u1ea1i n\u00e0o sau \u0111\u00e2y.<\/strong><\/p>\nA. Mg.<\/p>\n
B. Cu.<\/p>\n
C. Fe.<\/p>\n
D. Cr.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u0110\u00e1p \u00e1n B.<\/p>\n
S\u1ed1 mol H2<\/sub>\u00a0l\u00e0: nH2<\/sub>= 5,376\/22,4 = 0,24(mol)<\/p>\nS\u1ed1 mol HCl nHCl<\/sub>\u00a0= 0,5.1 = 0,5(mol)<\/p>\n2M + 2nHCl \u21922 MCln<\/sub>\u00a0+ H2<\/sub><\/p>\nS\u1ed1 mol HCl nHCl<\/sub>\u00a0= 2. nH2<\/sub>\u00a0= 2.0,24 = 0,48(mol). So v\u1edbi ban \u0111\u1ea7u HCl ph\u1ea3n \u1ee9ng c\u00f2n d\u01b0<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-4-trang-103-sgk-hoa-12.png\")
<\/p>\n
V\u1eady M l\u00e0 Ca.<\/p>\n
\n
\n
B\u00e0i 5 (trang 103 SGK H\u00f3a 12):\u00a0\u0110i\u1ec7n ph\u00e2n n\u00f3ng ch\u1ea3y mu\u1ed1i clorua c\u1ee7a kim lo\u1ea1i M. \u1ede catot thu \u0111\u01b0\u1ee3c 6 gam kim lo\u1ea1i v\u00e0 \u1edf anot c\u00f3 3,36 l\u00edt kh\u00ed (\u0111ktc) tho\u00e1t ra. Mu\u1ed1i clorua \u0111\u00f3 l\u00e0:<\/strong><\/p>\nA. NaCl.<\/p>\n
B. KCl.<\/p>\n
C. BaCl2<\/sub>.<\/p>\nD. CaCl2<\/sub>.<\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u0110\u00e1p \u00e1n D.<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-5-trang-103-sgk-hoa-12.png\")
<\/p>\n
C\u00f4ng th\u1ee9c mu\u1ed1i CaCl2<\/sub><\/p>\n\n
<\/div>\n<\/div>\n
<\/div>\n<\/div>\n<\/div>\n
<\/div>\n
<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 103 SGK H\u00f3a 12):\u00a0B\u1eb1ng nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p h\u00f3a h\u1ecdc n\u00e0o c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ebf Ag t\u1eeb dung d\u1ecbch AgNO3, \u0111i\u1ec1u ch\u1ebf Mg t\u1eeb dung d\u1ecbch MgCl2? Vi\u1ebft c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc. L\u1eddi gi\u1ea3i: C\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ebf Ag t\u1eeb AgNO3\u00a0l\u00e0 : – Nhi\u1ec7t ph\u00e2n : – Th\u1ee7y luy\u1ec7n : – […]<\/p>\n","protected":false},"author":3,"featured_media":24449,"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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