2<\/sub>. H\u00e0m l\u01b0\u1ee3ng c\u00e1c nguy\u00ean t\u1eed Fe v\u00e0 Si trong qu\u1eb7ng n\u00e0y l\u00e0 :<\/strong><\/p>\nA. 56% Fe v\u00e0 4,7% Si<\/p>\n
B. 54% Fe v\u00e0 3,7% Si<\/p>\n
C. 53% Fe v\u00e0 2,7% Si<\/p>\n
D. 52% Fe v\u00e0 4,7% Si<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Gi\u1ea3 s\u1eed c\u00f3 100 gam qu\u1eb7ng s\u1eaft, kh\u1ed1i l\u01b0\u1ee3ng Fe2<\/sub>O3<\/sub>\u00a0l\u00e0 80 gam v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng SiO2<\/sub>\u00a0l\u00e0 10 gam<\/p>\nS\u1ed1 mol Fe2<\/sub>O3<\/sub>\u00a0l\u00e0 nFe2O3<\/sub>\u00a0= 80 \/ 160 = 0,5(mol)<\/p>\nnFe<\/sub>\u00a0= 2 x nFe2<\/sub>O3<\/sub>\u00a0= 0,5.2 = 1(mol)<\/p>\n\u2192 mFe<\/sub>\u00a0= 1.56 = 56(g)<\/p>\n%mFe<\/sub>\u00a0= 56 \/ 100 x 100% = 56%<\/p>\nT\u01b0\u01a1ng t\u1ef1 t\u00ednh cho Si , %Si = 4,7%<\/p>\n
\u0110\u00e1p \u00e1n l\u00e0 A.<\/p>\n
B\u00e0i 4 (trang 98 SGK H\u00f3a 12):\u00a0\u0110\u1ec3 kh\u1eed ho\u00e0n to\u00e0n 30 gam h\u1ed7n h\u1ee3p g\u1ed3m CuO, FeO, Fe3<\/sub>O4<\/sub>, Fe2<\/sub>O3<\/sub>,Fe, MgO c\u1ea7n d\u00f9ng 5,6 l\u00edt kh\u00ed CO (\u0111ktc). Kh\u1ed1i l\u01b0\u1ee3ng ch\u1ea5t r\u1eafn thu \u0111\u01b0\u1ee3c sau ph\u1ea3n \u1ee9ng l\u00e0 :<\/strong><\/p>\nA. 28g.<\/p>\n
B. 26g.<\/p>\n
C. 24g.<\/p>\n
D. 22g.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
\u00c1p d\u1ee5ng \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n kh\u1ed1i l\u01b0\u1ee3ng ta c\u00f3 :<\/p>\n
30 + mCO<\/sub>\u00a0= m + mCO2<\/sub>\u00a0=> m = 30 + 5,6 \/ 22,4 x 28 – 5,6\/22,4 x 44 = 26 (g)<\/p>\n\u0110\u00e1p \u00e1n B.<\/p>\n
B\u00e0i 5 (trang 98 SGK H\u00f3a 12):\u00a0\u0110i\u1ec7n ph\u00e2n (\u0111i\u1ec7n c\u1ef1c tr\u01a1) dung d\u1ecbch mu\u1ed1i sunfua c\u1ee7a m\u1ed9t kim lo\u1ea1i h\u00f3a tr\u1ecb II v\u1edbi d\u00f2ng \u0111i\u1ec7n c\u01b0\u1eddng \u0111\u1ed9 3A. Sau khi 1930 gi\u00e2y \u0111i\u1ec7n ph\u00e2n th\u1ea5y kh\u1ed1i l\u01b0\u1ee3ng catot t\u0103ng 1,92 gam.<\/strong><\/p>\na. Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a ph\u1ea3n \u1ee9ng x\u1ea3y ra t\u1ea1i m\u1ed7i \u0111i\u1ec7n c\u1ef1c v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc chung c\u1ee7a s\u1ef1 \u0111i\u1ec7n ph\u00e2n.<\/p>\n
b. X\u00e1c \u0111\u1ecbnh t\u00ean kim lo\u1ea1i.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-5-trang-98-sgk-hoa-12.png\")
<\/p>\n
<\/p>\n
<\/div>\n
<\/div>\n
<\/div>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 98 SGK H\u00f3a 12):\u00a0Tr\u00ecnh b\u00e0y c\u00e1c c\u00e1ch c\u00f3 th\u1ec3 : – \u0110i\u1ec1u ch\u1ebf Ca t\u1eeb CaCO3 – \u0110i\u1ec1u ch\u1ebf Cu t\u1eeb CuSO4 Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c ph\u1ea3n \u1ee9ng L\u1eddi gi\u1ea3i: Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf Ca l\u00e0 \u0111i\u1ec7n ph\u00e2n n\u00f3ng ch\u1ea3y mu\u1ed1i halogenua khan T\u1eeb CuSO4\u00a0\u0111i\u1ec1u ch\u1ebf Cu c\u00f3 […]<\/p>\n","protected":false},"author":3,"featured_media":24472,"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
Ch\u01b0\u01a1ng 5 - B\u00e0i 21: \u0110i\u1ec1u ch\u1ebf kim lo\u1ea1i<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 5 - B\u00e0i 21: \u0110i\u1ec1u ch\u1ebf kim lo\u1ea1i\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 98 SGK H\u00f3a 12):\u00a0Tr\u00ecnh b\u00e0y c\u00e1c c\u00e1ch c\u00f3 th\u1ec3 : – \u0110i\u1ec1u ch\u1ebf Ca t\u1eeb CaCO3 – \u0110i\u1ec1u ch\u1ebf Cu t\u1eeb CuSO4 Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c ph\u1ea3n \u1ee9ng L\u1eddi gi\u1ea3i: Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf Ca l\u00e0 \u0111i\u1ec7n ph\u00e2n n\u00f3ng ch\u1ea3y mu\u1ed1i halogenua khan T\u1eeb CuSO4\u00a0\u0111i\u1ec1u ch\u1ebf Cu c\u00f3 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/\" \/>\n<meta property=\"og:site_name\" content=\"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam\" \/>\n<meta property=\"article:published_time\" content=\"2018-03-29T08:30:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-1-trang-98-sgk-hoa-12.png\" \/>\n\t<meta property=\"og:image:width\" content=\"339\" \/>\n\t<meta property=\"og:image:height\" content=\"85\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"H\u00e0 Trang\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"H\u00e0 Trang\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/\",\"url\":\"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/\",\"name\":\"Ch\u01b0\u01a1ng 5 - B\u00e0i 21: \u0110i\u1ec1u ch\u1ebf kim lo\u1ea1i\",\"isPartOf\":{\"@id\":\"https:\/\/lop12.edu.vn\/#website\"},\"datePublished\":\"2018-03-29T08:30:53+00:00\",\"dateModified\":\"2018-03-29T08:30:53+00:00\",\"author\":{\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45\"},\"breadcrumb\":{\"@id\":\"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/lop12.edu.vn\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Ch\u01b0\u01a1ng 5 – B\u00e0i 21: \u0110i\u1ec1u ch\u1ebf kim lo\u1ea1i\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/lop12.edu.vn\/#website\",\"url\":\"https:\/\/lop12.edu.vn\/\",\"name\":\"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/lop12.edu.vn\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45\",\"name\":\"H\u00e0 Trang\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g\",\"caption\":\"H\u00e0 Trang\"},\"url\":\"https:\/\/lop12.edu.vn\/author\/trangvth2\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Ch\u01b0\u01a1ng 5 - B\u00e0i 21: \u0110i\u1ec1u ch\u1ebf kim lo\u1ea1i","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/","og_locale":"en_US","og_type":"article","og_title":"Ch\u01b0\u01a1ng 5 - B\u00e0i 21: \u0110i\u1ec1u ch\u1ebf kim lo\u1ea1i","og_description":"B\u00e0i 1 (trang 98 SGK H\u00f3a 12):\u00a0Tr\u00ecnh b\u00e0y c\u00e1c c\u00e1ch c\u00f3 th\u1ec3 : – \u0110i\u1ec1u ch\u1ebf Ca t\u1eeb CaCO3 – \u0110i\u1ec1u ch\u1ebf Cu t\u1eeb CuSO4 Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c ph\u1ea3n \u1ee9ng L\u1eddi gi\u1ea3i: Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf Ca l\u00e0 \u0111i\u1ec7n ph\u00e2n n\u00f3ng ch\u1ea3y mu\u1ed1i halogenua khan T\u1eeb CuSO4\u00a0\u0111i\u1ec1u ch\u1ebf Cu c\u00f3 […]","og_url":"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/","og_site_name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam","article_published_time":"2018-03-29T08:30:53+00:00","og_image":[{"width":339,"height":85,"url":"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-1-trang-98-sgk-hoa-12.png","type":"image\/png"}],"author":"H\u00e0 Trang","twitter_card":"summary_large_image","twitter_misc":{"Written by":"H\u00e0 Trang","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/","url":"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/","name":"Ch\u01b0\u01a1ng 5 - B\u00e0i 21: \u0110i\u1ec1u ch\u1ebf kim lo\u1ea1i","isPartOf":{"@id":"https:\/\/lop12.edu.vn\/#website"},"datePublished":"2018-03-29T08:30:53+00:00","dateModified":"2018-03-29T08:30:53+00:00","author":{"@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45"},"breadcrumb":{"@id":"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lop12.edu.vn\/chuong-5-bai-21-dieu-che-kim-loai\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lop12.edu.vn\/"},{"@type":"ListItem","position":2,"name":"Ch\u01b0\u01a1ng 5 – B\u00e0i 21: \u0110i\u1ec1u ch\u1ebf kim lo\u1ea1i"}]},{"@type":"WebSite","@id":"https:\/\/lop12.edu.vn\/#website","url":"https:\/\/lop12.edu.vn\/","name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/lop12.edu.vn\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45","name":"H\u00e0 Trang","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g","caption":"H\u00e0 Trang"},"url":"https:\/\/lop12.edu.vn\/author\/trangvth2\/"}]}},"_links":{"self":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24471"}],"collection":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/comments?post=24471"}],"version-history":[{"count":2,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24471\/revisions"}],"predecessor-version":[{"id":24478,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24471\/revisions\/24478"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media\/24472"}],"wp:attachment":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media?parent=24471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/categories?post=24471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/tags?post=24471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-1-trang-98-sgk-hoa-12.png\")
<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-1-trang-98-sgk-hoa-12-1.png\")
<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-1-trang-98-sgk-hoa-12-2.png\")
<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-2-trang-98-sgk-hoa-12.png\")
<\/p>\n