{"id":7767,"date":"2021-11-20T15:21:33","date_gmt":"2021-11-20T08:21:33","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7767"},"modified":"2021-11-20T17:13:27","modified_gmt":"2021-11-20T10:13:27","slug":"vi-sao-thep-khong-gi-lai-bi-gi","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/vi-sao-thep-khong-gi-lai-bi-gi\/","title":{"rendered":"V\u00ec sao th\u00e9p kh\u00f4ng g\u1ec9 l\u1ea1i b\u1ecb g\u1ec9?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ng\u00e0y nay c\u00e1c v\u1eadt d\u1ee5ng ch\u1ebf b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong cu\u1ed9c s\u1ed1ng h\u1eb1ng ng\u00e0y. C\u00e1c \u0111\u1ed3 d\u00f9ng b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 nh\u01b0 c\u1ed1c, li\u1ec5n \u0111\u1ef1ng c\u01a1m, c\u00e1c d\u1ee5ng c\u1ee5 nh\u00e0 b\u1ebfp\u2026 r\u1ea5t b\u00f3ng, d\u1ec5 r\u1eeda, kh\u00f4ng b\u1ecb g\u1ec9, kh\u00f4ng ch\u1ec9 \u0111\u1eb9p m\u00e0 c\u00f2n b\u1ec1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0 t\u00ean g\u1ecdi c\u1ee7a n\u00f3, th\u00e9p kh\u00f4ng g\u1ec9 kh\u00f4ng b\u1ecb g\u1ec9. T\u00ednh kh\u00f4ng g\u1ec9 c\u00f3 li\u00ean quan ch\u1eb7t ch\u1ebd v\u1edbi th\u00e0nh ph\u1ea7n c\u1ee7a th\u00e9p. Trong th\u00e0nh ph\u1ea7n c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9, ngo\u00e0i s\u1eaft c\u00f2n c\u00f3 crom, niken, nh\u00f4m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u00e9p kh\u00f4ng g\u1ec9, h\u00e0m l\u01b0\u1ee3ng crom kh\u00f4ng \u00edt h\u01a1n 12%, cao nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ebfn 18%. Khi \u0111\u01b0a nguy\u00ean t\u1ed1 crom v\u00e0o th\u00e9p s\u1ebd l\u00e0m k\u1ebft c\u1ea5u c\u1ee7a th\u00e9p \u0111\u1ed3ng \u0111\u1ec1u h\u01a1n, nh\u1edd c\u1ea3i thi\u1ec7n \u0111\u01b0\u1ee3c t\u00ednh n\u0103ng c\u1ee7a th\u00e9p. Tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a th\u00e9p h\u00ecnh th\u00e0nh m\u1ed9t l\u1edbp m\u00e0ng oxit b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t c\u1ee7a th\u00e9p, nh\u1edd \u0111\u00f3 t\u0103ng c\u01b0\u1eddng t\u00ednh ch\u1ecbu \u0103n m\u00f2n c\u1ee7a th\u00e9p l\u00ean nhi\u1ec1u l\u1ea7n. Nh\u1edd v\u1eady th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a kh\u00f4ng kh\u00ed, n\u01b0\u1edbc, axit, ki\u1ec1m v\u00e0 khi th\u00e9p kh\u00f4ng g\u1ec9 ti\u1ebfp x\u00fac v\u1edbi c\u00e1c lo\u1ea1i axit, ki\u1ec1m s\u1ebd kh\u00f4ng b\u1ecb \u0103n m\u00f2n. C\u00e1c nh\u00e0 khoa h\u1ecdc t\u00ecm th\u1ea5y n\u1ebfu c\u1ea5u tr\u00fac n\u1ed9i b\u1ed9 c\u1ee7a th\u00e9p c\u00e0ng \u0111\u1ed3ng \u0111\u1ec1u th\u00ec c\u00e1c li\u00ean h\u1ec7 gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a th\u00e9p c\u00e0ng ch\u1eb7t ch\u1ebd v\u00e0 c\u00e0ng kh\u00f3 b\u1ecb \u0103n m\u00f2n, tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a th\u00e9p l\u1edbp m\u00e0ng b\u1ea3o v\u1ec7 c\u00e0ng b\u1ec1n nh\u01b0 m\u1ed9t t\u1ea5m gi\u00e1p b\u1ea3o v\u1ec7 n\u00ean th\u00e9p kh\u00f4ng b\u1ecb g\u1ec9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean n\u00f3i b\u1ecb g\u1ec9 hay kh\u00f4ng b\u1ecb g\u1ec9 ch\u1ec9 l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i. Kh\u00f4ng c\u00f3 kim lo\u1ea1i tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng b\u1ecb g\u1ec9. Ngay c\u1ea3 c\u00e1c kim lo\u1ea1i r\u1ea5t kh\u00f3 b\u1ecb g\u1ec9 nh\u01b0 v\u00e0ng ho\u1eb7c b\u1ea1ch kim th\u00ec v\u1edbi c\u00e1c dung d\u1ecbch c\u00e1c ch\u1ea5t c\u00f3 kh\u1ea3 n\u0103ng ho\u00e0 tan kim lo\u1ea1i r\u1ea5t m\u1ea1nh nh\u01b0 c\u01b0\u1eddng thu\u1ef7 (3 ph\u1ea7n axit clohy\u0111ric v\u00e0 1 ph\u1ea7n axit nitric) c\u00f3 b\u1ecb ho\u00e0 tan kh\u00f4ng? Th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ec9 b\u1ec1n v\u1eefng trong \u0111i\u1ec1u ki\u1ec7n oxy ho\u00e1, c\u00f2n trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4ng oxy ho\u00e1 s\u1ebd tr\u1edf n\u00ean kh\u00f4ng b\u1ec1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00e9p kh\u00f4ng g\u1ec9 b\u1ec1n v\u1edbi axit sunfuric \u0111\u1eb7c, nh\u01b0ng kh\u00f4ng b\u1ec1n v\u1edbi axit clohy\u0111ric l\u00e0 m\u00f4i tr\u01b0\u1eddng kh\u00f4ng oxy ho\u00e1. Ngo\u00e0i ra h\u00e0m l\u01b0\u1ee3ng crom v\u00e0 c\u00e1c nguy\u00ean t\u1ed1 kh\u00e1c trong th\u00e9p khi gia c\u00f4ng, x\u1eed l\u00fd nhi\u1ec7t kh\u00f4ng th\u00edch h\u1ee3p c\u0169ng tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ecbu \u0103n m\u00f2n c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9. T\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 n\u00f3i th\u00e9p kh\u00f4ng g\u1ec9 kh\u00f4ng b\u1ecb g\u1ec9 ch\u1ec9 l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i, trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u1eb7c bi\u1ec7t, th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 th\u1ec3 b\u1ecb g\u1ec9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb kho\u00e1: Th\u00e9p kh\u00f4ng g\u1ec9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ng\u00e0y nay c\u00e1c v\u1eadt d\u1ee5ng ch\u1ebf b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong cu\u1ed9c s\u1ed1ng h\u1eb1ng ng\u00e0y. C\u00e1c \u0111\u1ed3 d\u00f9ng b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 nh\u01b0 c\u1ed1c, li\u1ec5n \u0111\u1ef1ng c\u01a1m, c\u00e1c d\u1ee5ng c\u1ee5 nh\u00e0 b\u1ebfp\u2026 r\u1ea5t b\u00f3ng, d\u1ec5 r\u1eeda, kh\u00f4ng b\u1ecb g\u1ec9, kh\u00f4ng ch\u1ec9 \u0111\u1eb9p m\u00e0 c\u00f2n b\u1ec1n. Nh\u01b0 t\u00ean g\u1ecdi [&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":[8,15],"tags":[],"class_list":["post-7767","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7767","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=7767"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7767\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7767"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7767"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7767"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}