B\u00e0i 2 (trang 165 SGK H\u00f3a 12):\u00a0B\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00f3a h\u1ecdc, h\u00e3y ph\u00e2n bi\u1ec7t 3 m\u1eabu h\u1ee3p kim sau:<\/strong><\/p>\nAl \u2013 Fe; Al \u2013 Cu ; Cu \u2013 Fe.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Cho dung d\u1ecbch NaOH v\u00e0o 3 m\u1eabu h\u1ee3p kim, m\u1eabu th\u1eed n\u00e0o c\u00f3 kh\u00ed tho\u00e1t ra l\u00e0 Al-Fe v\u00e0 Al-Cu, m\u1eabu th\u1eed n\u00e0o kh\u00f4ng c\u00f3 kh\u00ed tho\u00e1t ra l\u00e0 Cu-Fe<\/p>\n
2Al + 2NaOH + 6H2<\/sub>O \u2192 2Na[Al(OH)4<\/sub>] + 3H2<\/sub><\/p>\nCho dung d\u1ecbch HCl \u0111\u1ebfn d\u01b0 v\u00e0o hai m\u1eabu th\u1eed tr\u00ean, m\u1eabu th\u1eed n\u00e0o kh\u00f4ng h\u00f2a tan h\u1ebft l\u00e0 Al-Cu, m\u1eabu th\u1eed n\u00e0o tan h\u1ebft l\u00e0 Al-Fe<\/p>\n
2Al + 6HCl \u2192 2AlCl3<\/sub>\u00a0+ 3H2<\/sub><\/p>\nFe + 2HCl \u2192 FeCl2<\/sub>\u00a0+ H2<\/sub><\/p>\nB\u00e0i 3 (trang 165 SGK H\u00f3a 12):\u00a0M\u1ed9t h\u1ed7n h\u1ee3p b\u1ed9t g\u1ed3m Al, Fe, Cu, H\u00e3y tr\u00ecnh b\u00e0y m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p h\u00f3a h\u1ecdc \u0111\u1ec3 t\u00e1ch t\u1eebng kim lo\u1ea1i ra kh\u1ecfi h\u1ed7n h\u1ee3p \u0111\u00f3. Vi\u1ebft c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c ph\u1ea3n \u1ee9ng.<\/strong><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Cho dung d\u1ecbch NaOH d\u01b0 v\u00e0o h\u1ed7n h\u1ee3p 3 kim lo\u1ea1i thu \u0111\u01b0\u1ee3c hai ph\u1ea7n.<\/p>\n
– Ph\u1ea7n dung d\u1ecbch l\u00e0 NaAlO2<\/sub>\u00a0v\u00e0 NaOH d\u01b0<\/p>\n– Ph\u1ea7n ch\u1ea5t r\u1eafn l\u00e0 Cu v\u00e0 Fe<\/p>\n
Al + NaOH + H2<\/sub>O \u2192 NaAlO2<\/sub>\u00a0+ 3\/2H2<\/sub><\/p>\nL\u1ea5y ph\u1ea7n dung d\u1ecbch d\u1eabn CO2<\/sub>\u00a0\u0111\u1ebfn d\u01b0 thu \u0111\u01b0\u1ee3c k\u1ebft t\u1ee7a Al(OH)3<\/sub>. L\u1ecdc l\u1ea5y k\u1ebft t\u1ee7a \u0111em nung ngo\u00e0i kh\u00f4ng kh\u00ed \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng kh\u00f4ng \u0111\u1ed5i thu \u0111\u01b0\u1ee3c ch\u1ea5t r\u1eafn l\u00e0 Al2<\/sub>O3<\/sub>. \u0110i\u1ec7n ph\u00e2n n\u00f3ng ch\u1ea3y Al2<\/sub>O3<\/sub>\u00a0ta \u0111\u01b0\u1ee3c Al.<\/p>\nNaAlO2<\/sub>\u00a0+ CO2<\/sub>\u00a0+ H2<\/sub>O \u2192 NaHCO3<\/sub>\u00a0+ Al(OH)3<\/sub>\u00a0\u2193<\/p>\nCO2<\/sub>\u00a0+ NaOH \u2192 NaHCO3<\/sub><\/p>\nCO2<\/sub>\u00a0+ NaOH \u2192 Na2CO3<\/sub>\u00a0+ H2<\/sub>O<\/p>\n2Al(OH)3<\/sub>\u00a0\u2192 Al2<\/sub>O3<\/sub>\u00a0+ 3H2<\/sub>O<\/p>\n2Al2<\/sub>O3<\/sub>\u00a0\u2192 4Al + 3O2<\/sub><\/p>\nPh\u1ea7n ch\u1ea5t r\u1eafn \u0111em h\u00f2a tan trong HCl d\u01b0, thu \u0111\u01b0\u1ee3c dung d\u1ecbch l\u00e0 FeCl2<\/sub>, c\u00f2n ph\u1ea7n ch\u1ea5t r\u1eafn l\u00e0 Cu. \u0110i\u1ec7n ph\u00e2n dung d\u1ecbch thu \u0111\u01b0\u1ee3c ta \u0111\u01b0\u1ee3c Fe.<\/p>\nFe + 2HCl \u2192 FeCl2<\/sub>\u00a0+ H2<\/sub><\/p>\nFeCl2<\/sub>\u00a0\u2192 Fe + Cl2<\/sub><\/p>\nB\u00e0i 4 (trang 165 SGK H\u00f3a 12):\u00a0Cho m\u1ed9t \u00edt b\u1ed9t s\u1eaft nguy\u00ean ch\u1ea5t t\u00e1c d\u1ee5ng h\u1ebft v\u1edbi dung d\u1ecbch H2<\/sub>SO4<\/sub>\u00a0lo\u00e3ng thu \u0111\u01b0\u1ee3c 560 ml m\u1ed9t ch\u1ea5t kh\u00ed \u1edf \u0111ktc. N\u1ebfu cho m\u1ed9t l\u01b0\u1ee3ng g\u1ea5p \u0111\u00f4i b\u1ed9t s\u1eaft n\u00f3i tr\u00ean t\u00e1c d\u1ee5ng h\u1ebft v\u1edbi dung d\u1ecbch CuSO4<\/sub>\u00a0th\u00ec thu \u0111\u01b0\u1ee3c m\u1ed9t ch\u1ea5t r\u1eafn. T\u00ednh kh\u1ed1i l\u01b0\u1ee3ng b\u1ed9t s\u1eaft \u0111\u00e3 d\u00f9ng trong hai tr\u01b0\u1eddng h\u1ee3p n\u00f3i tr\u00ean v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng ch\u1ea5t r\u1eafn thu \u0111\u01b0\u1ee3c.<\/strong><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
S\u1ed1 mol H2<\/sub>\u00a0l\u00e0 nH2<\/sub>\u00a0= 0,56 \/ 22,4 = 0,025 (mol)<\/p>\nFe + H2<\/sub>SO4<\/sub>\u00a0\u2192 FeSO4<\/sub>\u00a0+ H2<\/sub><\/p>\nTheo pt nFe<\/sub>\u00a0= nH2<\/sub>\u00a0= 0,025(mol) \u2192 mFe<\/sub>\u00a0= 0,025 x 56 = 1,4(g)<\/p>\nL\u01b0\u1ee3ng Fe g\u1ea5p \u0111\u00f4i khi \u0111\u00f3 s\u1ed1 mol Fe l\u00e0 : 0,05 (mol)<\/p>\n
Fe + CuSO4<\/sub>\u00a0\u2192 FeSO4<\/sub>\u00a0+ Cu<\/p>\nnFe<\/sub>\u00a0= 0,05 mol.<\/p>\nKh\u1ed1i l\u01b0\u1ee3ng Fe \u0111\u00e3 d\u00f9ng mFe<\/sub>\u00a0= 0,05 x 56 = 2,8 (g)<\/p>\nKh\u1ed1i l\u01b0\u1ee3ng ch\u1ea5t r\u1eafn m = mCu<\/sub>– mFe<\/sub>\u00a0= 0,05 x 64 \u2013 0,05 x 56 = 0,4(g)<\/p>\nB\u00e0i 5 (trang 165 SGK H\u00f3a 12):\u00a0Bi\u1ebft 2,3 gam h\u1ed7n h\u1ee3p g\u1ed3m MgO, CuO, FeO t\u00e1c d\u1ee5ng v\u1eeba \u0111\u1ee7 v\u1edbi 100ml dung d\u1ecbch H2<\/sub>SO4<\/sub>\u00a00,2M. Kh\u1ed1i l\u01b0\u1ee3ng mu\u1ed1i thu \u0111\u01b0\u1ee3c l\u00e0 :<\/strong><\/p>\nA. 3,6 gam.<\/p>\n
B. 3,7 gam.<\/p>\n
C. 3,8 gam.<\/p>\n
D. 3,9 gam.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u0110\u00e1p \u00e1n D.<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-5-trang-165-sgk-hoa-12.png\")
<\/p>\n
B\u00e0i 6 (trang 165 SGK H\u00f3a 12):\u00a0Nguy\u00ean t\u1eed c\u1ee7a nguy\u00ean t\u1ed1 X c\u00f3 t\u1ed5ng s\u1ed1 h\u1ea1t c\u01a1 b\u1ea3n (p,n,e) l\u00e0 82, trong \u0111\u00f3 s\u1ed1 h\u1ea1t mang \u0111i\u1ec7n nhi\u1ec1u h\u01a1n s\u1ed1 h\u1ea1t kh\u00f4ng mang \u0111i\u1ec7n l\u00e0 22. Nguy\u00ean t\u1ed1 X l\u00e0 nguy\u00ean t\u1ed1 n\u00e0o?<\/strong><\/p>\n\u00a0<\/strong><\/strong>A. S\u1eaft.<\/p>\nB. Brom.<\/p>\n
C. Photpho.<\/p>\n
D. Crom.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u0110\u00e1p \u00e1n A.<\/p>\n
G\u1ecdi p, n, e l\u1ea7n l\u01b0\u1ee3t l\u00e0 s\u1ed1 proton, notron v\u00e0 electron.<\/p>\n
Ta c\u00f3 p + n + e = 82.<\/p>\n
p + e – n = 22.<\/p>\n
\u2192 p = e = 26 ; n = 30.<\/p>\n
X l\u00e0 Fe.<\/p>\n<\/div>\n
<\/div>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 165 SGK H\u00f3a 12):\u00a0\u0110i\u1ec1n c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a ch\u1ea5t v\u00e0o nh\u1eefng ch\u1ed7 tr\u1ed1ng v\u00e0 l\u1eadp c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc sau: a. Fe + H2SO4\u0111\u1eb7c \u2192 SO2\u00a0+ \u2026\u2026\u2026 b. Fe + HNO3\u0111\u1eb7c \u2192 NO2\u00a0+ \u2026\u2026\u2026 c. Fe + HNO3lo\u00e3ng \u2192 NO + \u2026\u2026\u2026 d. FeS + HNO3\u00a0\u2192 NO + Fe2(SO4)3\u00a0+ \u2026\u2026\u2026 […]<\/p>\n","protected":false},"author":3,"featured_media":24296,"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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