{"id":1047,"date":"2021-10-08T13:06:25","date_gmt":"2021-10-08T13:06:25","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=1047"},"modified":"2021-10-14T22:09:11","modified_gmt":"2021-10-14T15:09:11","slug":"tinh-chat-hoa-hoc-cua-crom-tong-hop-kien-thuc-hoa-hoc-12","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tinh-chat-hoa-hoc-cua-crom-tong-hop-kien-thuc-hoa-hoc-12\/","title":{"rendered":"T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a Crom \u2013 T\u1ed5ng h\u1ee3p ki\u1ebfn th\u1ee9c h\u00f3a h\u1ecdc 12"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00f3a h\u1ecdc lu\u00f4n l\u00e0 m\u1ed9t m\u00f4n h\u1ecdc khi\u1ebfn cho r\u1ea5t nhi\u1ec1u b\u1ea1n tr\u1ebb c\u1ea3m th\u1ea5y kh\u00f3 kh\u0103n trong vi\u1ec7c ti\u1ebfp thu ki\u1ebfn th\u1ee9c. V\u00ec s\u1ed1 l\u01b0\u1ee3ng ki\u1ebfn th\u1ee9c c\u1ee7a n\u00f3 qu\u00e1 r\u1ed9ng v\u00e0 v\u00f4 c\u00f9ng kh\u00f3 nh\u1edb \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1ec1 nguy\u00ean t\u1ed1 crom. H\u00f4m nay, Vietlearn s\u1ebd g\u1eedi \u0111\u1ebfn cho c\u00e1c b\u1ea1n nh\u1eefng <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/a>, t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a crom. H\u00e3y c\u00f9ng theo d\u00f5i b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 h\u1ecdc \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec1u th\u00fa v\u1ecb nh\u00e9!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crom v\u00e0 h\u1ee3p ch\u1ea5t c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 crom \u2013 \u0111\u1ecbnh ngh\u0129a, t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crom l\u00e0 m\u1ed9t nguy\u00ean t\u1ed1 h\u00f3a h\u1ecdc \u0111\u1ee9ng \u1edf \u1ed5 th\u1ee9 24 trong b\u1ea3ng tu\u1ea7n ho\u00e0n. Crom c\u00f3 k\u00fd hi\u1ec7u l\u00e0 Cr v\u00e0 s\u1ed1 hi\u1ec7u nguy\u00ean t\u1eed l\u00e0 24. Crom l\u00e0 m\u1ed9t nguy\u00ean t\u1ed1 \u0111\u1ea7u ti\u00ean c\u1ee7a nh\u00f3m 6, l\u00e0 m\u1ed9t kim lo\u1ea1i gi\u00f2n c\u1ee9ng, c\u00f3 nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y cao. Trong h\u1ee3p ch\u1ea5t, crom c\u00f3 s\u1ed1 oxi h\u00f3a t\u1eeb +1 \u0111\u1ebfn + 6 nh\u1eefng s\u1ed1 oxi h\u00f3a ph\u1ed5 bi\u1ebfn l\u00e0 +2, +3, +6.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ede nhi\u1ec7t \u0111\u1ed9 b\u00ecnh th\u01b0\u1eddng, crom c\u00f3 c\u1ea5u t\u1ea1o m\u1ea1ng tinh th\u1ec3 l\u1eadp ph\u01b0\u01a1ng t\u00e2m kh\u1ed1i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u1ed1i l\u01b0\u1ee3ng nguy\u00ean t\u1eed: 52 g\/mol<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 \u00e2m \u0111i\u1ec7n: 1,66<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed3ng v\u1ecb: 40Cr, 51Cr, 52Cr, 53Cr, 54Cr<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crom c\u00f3 m\u00e0u tr\u1eafng \u00e1nh b\u1ea1c. Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang l\u1edbn d = 7,2 g\/cm3, nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y cao tnc 1890oC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0 kim lo\u1ea1i r\u1ea5t c\u1ee9ng nh\u1ea5t ch\u1ec9 \u0111\u1ee9ng sau m\u1ed7i kim c\u01b0\u01a1ng, ch\u00fang c\u00f3 th\u1ec3 r\u1ea1ch \u0111\u01b0\u1ee3c c\u1ea3 th\u1ee7y tinh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u1ea1ng th\u00e1i t\u1ef1 nhi\u00ean: Crom l\u00e0 m\u1ed9t nguy\u00ean t\u1ed1 c\u00f3 m\u1ee9c \u0111\u1ed9 ph\u1ed5 bi\u1ebfn \u0111\u1ee9ng th\u1ee9 21 trong l\u1edbp v\u1ecf Tr\u00e1i \u0110\u1ea5t v\u1edbi n\u1ed3ng \u0111\u1ed9 trung b\u00ecnh l\u00e0 100 ppm. C\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a crom \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n trong m\u00f4i tr\u01b0\u1eddng c\u00e1c \u0111\u00e1 ch\u1ee9a crom b\u1ecb b\u00e0o m\u00f2n v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y t\u1eeb n\u00fai l\u1eeda. Ngo\u00e0i ra, crom c\u00f2n \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf d\u01b0\u1edbi d\u1ea1ng qu\u1eb7ng cromit (FeCr2O4).<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Xem th\u00eam v\u1ec1 Kim lo\u1ea1i ki\u1ec3m th\u1ed5<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a crom c\u0169ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c kim lo\u1ea1i kh\u00e1c, \u0111\u1ec1u t\u00e1c d\u1ee5ng v\u1edbi phi kim, v\u1edbi n\u01b0\u1edbc v\u00e0 dung d\u1ecbch axit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1c d\u1ee5ng v\u1edbi phi kim:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi oxi \u1edf nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng, crom r\u1ea5t b\u1ec1n do c\u00f3 l\u1edbp m\u00e0ng axit b\u1ea3o v\u1ec7<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4Cr + 3O2 \u2192 2Cr2O3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi halogen<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2Cr + 3Cl2 \u2192 2CrCl3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1c d\u1ee5ng v\u1edbi n\u01b0\u1edbc<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crom b\u1ec1n v\u1edbi n\u01b0\u1edbc v\u00e0 kh\u00f4ng kh\u00ed do \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi m\u1ed9t l\u1edbp m\u00e0ng m\u1ecfng v\u00e0 b\u1ec1n. V\u00ec v\u1eady ng\u01b0\u1eddi ta th\u01b0\u1eddng m\u1ea1 crom l\u00ean s\u1eaft \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u00fang kh\u00f4ng b\u1ecb \u0103n m\u00f2n v\u00e0 ch\u1ebf t\u1ea1o th\u00e9p kh\u00f4ng g\u1ec9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1c d\u1ee5ng v\u1edbi dung d\u1ecbch axit<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong dung d\u1ecbch HCl v\u00e0 H2SO4 lo\u00e3ng n\u00f3ng, m\u00e0ng axit s\u1ebd b\u1ecb ph\u00e1 h\u1ee7y, n\u00ean crom s\u1ebd khu \u0111i ion H+ t\u1ea1o ra mu\u1ed1i Cr(II) v\u00e0 kh\u00ed hi\u0111ro.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cr + H2SO4 \u2192 CrSO4 + H2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u01b0\u01a1ng t\u1ef1 nh\u00f4m, crom kh\u00f4ng t\u00e1c d\u1ee5ng v\u1edbi HNO3 v\u00e0 H2SO4 \u0111\u1eb7c ngu\u1ed9i m\u00e0 ch\u00fang s\u1ebd l\u00e0m cho kim lo\u1ea1i Crom tr\u1edf n\u00ean th\u1ee5 \u0111\u1ed9ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi HNO3 lo\u00e3ng, \u0111\u1eb7c n\u00f3ng v\u00e0 H2SO4 \u0111\u1eb7c n\u00f3ng \u2192 Cr3+ + H2O + \u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cr + 4HNO3 \u2192 Cr(NO3)3 + NO + 2H2O<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p> \u0110\u1ed3ng v\u00e0 h\u1ee3p ch\u1ea5t c\u1ee7a \u0111\u1ed3ng \u2013 C\u00f9ng Vietlearn chinh ph\u1ee5c h\u00f3a h\u1ecdc!<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u ch\u1ebf d\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong t\u1ef1 nhi\u00ean r\u1ea5t kh\u00f3 \u0111\u1ec3 t\u00ecm th\u1ea5y crom \u1edf d\u1ea1ng \u0111\u01a1n ch\u1ea5t m\u00e0 \u0111a s\u1ed1 l\u00e0 \u1edf d\u1ea1ng h\u1ee3p ch\u1ea5t chi\u1ebfm 0.03% kh\u1ed1i l\u01b0\u1ee3ng tr\u00e1i \u0111\u1ea5t. H\u1ee3p ch\u1ea5t crom ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y l\u00e0 qu\u1eb7ng cromit s\u1eaft FeO.Cr2O3, qu\u1eb7ng n\u00e0y th\u01b0\u1eddng ch\u1eefa l\u1eabn c\u1ea3 Al2O3 v\u00e0 SiO2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Oxit crom (Cr2O3) \u0111\u01b0\u1ee3c t\u00e1ch ra t\u1eeb qu\u1eb7ng. Sau \u0111\u00f3 \u0111i\u1ec1u ch\u1ebf crom b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nhi\u1ec7t nh\u00f4m:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cr2O3 + 2Al \u2192 2Cr + Al2O3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ee8ng d\u1ee5ng c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p luy\u1ec7n kim, \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 l\u00e0m s\u00e1ng b\u00f3ng b\u1ec1 m\u1eb7t, m\u1ed9t s\u1ed1 h\u1ee3p kim s\u1ebd \u0111\u01b0\u1ee3c m\u1ea1 m\u1ed9t l\u1edbp crom, ti\u00eau bi\u1ec3u l\u00e0 d\u00f9ng \u0111\u1ec3 ch\u1ebf t\u1ea1o v\u00e0 s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0 th\u00e0nh ph\u1ea7n d\u00f9ng l\u00e0m thu\u1ed1c nhu\u1ed9m cho s\u01a1n v\u00e0 son.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f9ng c\u00e1c mu\u1ed1i crom \u0111\u1ec3 nhu\u1ed9m m\u00e0u cho th\u1ee7y tinh, ng\u1ecdc l\u1ee5c b\u1ea3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crom c\u00f3 th\u00e0nh ph\u1ea7n t\u1ea1o ra \u0111\u01b0\u1ee3c s\u1eafc \u0111\u1ecf, n\u00ean n\u00f3 c\u0169ng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t ra h\u1ed3ng ng\u1ecdc t\u1ed5ng h\u1ee3p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ee3p ch\u1ea5t c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ee3p ch\u1ea5t crom (III):<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crom (III) oxit \u2013 Cr2O3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crom (III) hidroxit \u2013 Cr(OH)3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ee3p ch\u1ea5t crom (VI):<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crom (VI) oxit \u2013 CrO3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mu\u1ed1i crom (VI): CrO42-, Cr2O72-<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 d\u1ea1ng b\u00e0i t\u1eadp \u1ee9ng d\u1ee5ng t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 d\u1ea1ng b\u00e0i t\u1eadp crom<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e2u 1: Ho\u00e0n th\u00e0nh ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c ph\u1ea3n \u1ee9ng trong d\u00e3y chuy\u1ec3n \u0111\u1ed5i sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cu \u2192 CuS \u2192 Cu(NO3)2 \u2192 Cu(OH)2 \u2192 CuCl2 \u2192 Cu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e2u 2: Khi cho 100 g h\u1ee3p kim g\u1ed3m c\u00f3 Fe, Cr v\u00e0 Al t\u00e1c d\u1ee5ng v\u1edbi l\u01b0\u1ee3ng d\u01b0 dung d\u1ecbch NaOH thu \u0111\u01b0\u1ee3c 6,72 l\u00edt kh\u00ed. L\u1ea5y b\u00e3 r\u1eafn kh\u00f4ng tan cho t\u00e1c d\u1ee5ng m\u1ed9t l\u01b0\u1ee3ng d\u01b0 dung d\u1ecbch HCl (khi kh\u00f4ng c\u00f3 kh\u00f4ng kh\u00ed) thu 38,08 l\u00edt kh\u00ed. C\u00e1c th\u1ec3 t\u00edch \u0111o \u1edf \u0111ktc. X\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n % c\u1ee7a h\u1ee3p kim.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e2u 3: Kh\u1eed m gam b\u1ed9t CuO b\u1eb1ng kh\u00ed H2 \u1edf nhi\u1ec7t \u0111\u1ed9 cao thu \u0111\u01b0\u1ee3c h\u1ed7n h\u1ee3p ch\u1ea5t r\u1eafn X. \u0110\u1ec3 h\u00f2a tan h\u1ebft X c\u1ea7n v\u1eeba \u0111\u1ee7 1 l\u00edt dung d\u1ecbch HNO3 1M, thu \u0111\u01b0\u1ee3c 4,48 l\u00edt NO (\u0111ktc). Hi\u1ec7u su\u1ea5t c\u1ee7a ph\u1ea3n \u1ee9ng kh\u1eed CuO b\u1eb1ng bao nhi\u00eau?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e2u 4: Cho Cu t\u00e1c d\u1ee5ng v\u1edbi dung d\u1ecbch h\u1ed7n h\u1ee3p g\u1ed3m NaNO3 v\u00e0 H2SO4 lo\u00e3ng s\u1ebd gi\u1ea3i ph\u00f3ng kh\u00ed n\u00e0o sau \u0111\u00e2y?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NO2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NO.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N2O.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NH3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1eddi k\u1ebft<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i vi\u1ebft tr\u00ean l\u00e0 m\u1ed9t s\u1ed1 ki\u1ebfn th\u1ee9c quan tr\u1ecdng v\u1ec1 crom v\u00e0 t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a crom m\u00e0 Vietlearn mu\u1ed1n g\u1eedi \u0111\u1ebfn cho c\u00e1c b\u1ea1n. Hy v\u1ecdng v\u1edbi nh\u1eefng th\u00f4ng tin tr\u00ean s\u1ebd gi\u00fap c\u00e1c b\u1ea1n <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> hi\u1ec3u r\u00f5 v\u1ec1 nguy\u00ean t\u1ed1 crom v\u00e0 h\u1ecdc t\u1ed1t m\u00f4n h\u00f3a h\u01a1n. N\u1ebfu c\u00e1c b\u1ea1n c\u00f2n mu\u1ed1n t\u00ecm hi\u1ec3u th\u00eam v\u1edbi b\u1ed9 m\u00f4n ho\u00e1 h\u1ecdc, h\u00e3y truy c\u1eadp ngay v\u00e0o website: Vietlearn.org\/ \u0111\u1ec3 t\u00ecm hi\u1ec3u nh\u00e9!<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u0110\u1ecdc th\u00eam c\u00e1c b\u00e0i vi\u1ebft c\u00f9ng ch\u1ee7 \u0111\u1ec1<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc \u0111\u1eb7c tr\u01b0ng c\u1ee7a Kim lo\u1ea1i la\u0300 gi\u0300 \u2013 H\u00f3a h\u1ecdc l\u1edbp 9<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00f3a h\u1ecdc 12 \u2013 N\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c chu\u1ea9n b\u1ecb cho k\u1ef3 thi \u0110\u1ea1i h\u1ecdc<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a Kim lo\u1ea1i \u2013 H\u1ecdc t\u1ed1t H\u00f3a 9 c\u00f9ng Vietlearn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00e3y ho\u1ea1t \u0111\u1ed9ng h\u00f3a h\u1ecdc c\u1ee7a kim lo\u1ea1i \u0111\u1ea7y \u0111\u1ee7 l\u1edbp<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn H\u00f3a h\u1ecdc lu\u00f4n l\u00e0 m\u1ed9t m\u00f4n h\u1ecdc khi\u1ebfn cho r\u1ea5t nhi\u1ec1u b\u1ea1n tr\u1ebb c\u1ea3m th\u1ea5y kh\u00f3 kh\u0103n trong vi\u1ec7c ti\u1ebfp thu ki\u1ebfn th\u1ee9c. V\u00ec s\u1ed1 l\u01b0\u1ee3ng ki\u1ebfn th\u1ee9c c\u1ee7a n\u00f3 qu\u00e1 r\u1ed9ng v\u00e0 v\u00f4 c\u00f9ng kh\u00f3 nh\u1edb \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1ec1 nguy\u00ean t\u1ed1 crom. H\u00f4m nay, Vietlearn s\u1ebd g\u1eedi [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[8,5],"tags":[],"class_list":["post-1047","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-pho-thong"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1047","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=1047"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1047\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1047"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}