C\u00e1c b\u1ea1n \u0111\u00e3 t\u1eebng \u0111\u01b0\u1ee3c th\u1ea5y “c\u00e2y kim lo\u1ea1i” m\u1ecdc ra t\u1eeb m\u1ed9t s\u1ed1 dung d\u1ecbch mu\u1ed1i trong c\u00e1c th\u00ed nghi\u1ec7m ho\u00e1 h\u1ecdc ch\u01b0a?<\/p>\n\n\n\n
B\u1ea1n h\u00e3y l\u1ea5y m\u1ed9t b\u00ecnh c\u1ea7u th\u00ed nghi\u1ec7m \u0111\u00e1y b\u1eb1ng, cho v\u00e0o \u0111\u00f3 dung d\u1ecbch ch\u00ec axetat, kho\u1ea3ng n\u1eeda dung t\u00edch c\u1ee7a b\u00ecnh. \u0110\u1eady n\u1eafp b\u00ecnh b\u1eb1ng m\u1ed9t n\u00fat cao su. D\u00f9ng m\u1ed9t s\u1ee3i d\u00e2y v\u1ea3i xuy\u00ean qua n\u00fat cao su. Cu\u1ed1i s\u1ee3i d\u00e2y c\u00f3 bu\u1ed9c m\u1ed9t d\u00e2y k\u1ebdm nh\u1ecf, cho \u0111\u1ea7u d\u00e2y k\u1ebdm nh\u00fang v\u00e0o dung d\u1ecbch ch\u00ec axetat. \u0110\u1ec3 y\u00ean dung d\u1ecbch sau v\u00e0i ba ng\u00e0y. B\u1ea1n s\u1ebd th\u1ea5y tr\u00ean \u0111\u1ea7u d\u00e2y k\u1ebdm xu\u1ea5t hi\u1ec7n m\u1ed9t “c\u00e2y kim lo\u1ea1i” s\u00e1ng lung linh.<\/p>\n\n\n\n
V\u1eady “c\u00e2y kim lo\u1ea1i” n\u00e0y t\u1eeb \u0111\u00e2u m\u00e0 ra? \u0110\u00f3 l\u00e0 do khi ta nh\u00fang d\u00e2y k\u1ebdm v\u00e0o dung d\u1ecbch ch\u00ec axetat, gi\u1eefa d\u00e2y k\u1ebdm v\u00e0 dung d\u1ecbch ch\u00ec axetat \u0111\u00e3 x\u1ea3y ra ph\u1ea3n \u1ee9ng ho\u00e1 h\u1ecdc. K\u1ebdm l\u00e0 kim lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng h\u01a1n ch\u00ec n\u00ean khi k\u1ebdm ti\u1ebfp x\u00fac v\u1edbi dung d\u1ecbch ch\u00ec axetat, k\u1ebdm t\u1eeb d\u00e2y k\u1ebdm s\u1ebd \u0111i v\u00e0o dung d\u1ecbch, c\u00f2n ch\u00ec t\u1eeb dung d\u1ecbch s\u1ebd k\u1ebft \u0111\u1ecdng tr\u00ean d\u00e2y k\u1ebdm \u1edf d\u1ea1ng ch\u00ec kim lo\u1ea1i. \u0110i\u1ec1u n\u00e0y t\u01b0\u01a1ng t\u1ef1 nh\u01b0 ch\u00ec v\u00e0 k\u1ebdm \u0111\u00e3 thay \u0111\u1ed5i ch\u1ed7 cho nhau tr\u00ean d\u00e2y k\u1ebdm v\u00e0 dung d\u1ecbch, v\u00e0 ng\u01b0\u1eddi ta g\u1ecdi \u0111\u00e2y l\u00e0 ph\u1ea3n \u1ee9ng trao \u0111\u1ed5i. L\u01b0\u1ee3ng ch\u00ec b\u00e1m tr\u00ean b\u1ec1 m\u1eb7t c\u00e0ng l\u1edbn d\u1ea7n l\u00ean v\u00e0 t\u1ea1o th\u00e0nh “c\u00e2y ch\u00ec”.<\/p>\n\n\n\n
Lo\u1ea1i ph\u1ea3n \u1ee9ng trao \u0111\u1ed5i nh\u01b0 tr\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng kh\u00e1 r\u1ed9ng r\u00e3i. V\u00ed d\u1ee5 tr\u01b0\u1edbc \u0111\u00e2y trong qu\u00e1 tr\u00ecnh luy\u1ec7n \u0111\u1ed3ng theo \u0111\u01b0\u1eddng l\u1ed1i \u01b0\u1edbt, ng\u01b0\u1eddi ta d\u00f9ng c\u00e1c l\u00e1 s\u1eaft cho v\u00e0o dung d\u1ecbch \u0111\u1ed3ng sunfat v\u00e0 x\u1ea3y ra ph\u1ea3n \u1ee9ng trao \u0111\u1ed5i \u0111\u1ed3ng v\u00e0 s\u1eaft, \u0111\u1ed3ng s\u1ebd b\u1ecb \u0111\u1ea9y ra kh\u1ecfi dung d\u1ecbch. B\u1eb1ng c\u00e1ch t\u01b0\u01a1ng t\u1ef1 ng\u01b0\u1eddi ta thu h\u1ed3i b\u1ea1c t\u1eeb dung d\u1ecbch \u0111\u1ecbnh h\u00ecnh trong qu\u00e1 tr\u00ecnh in tr\u00e1ng phim \u1ea3nh, c\u0169ng nh\u01b0 d\u00f9ng \u0111\u1ed3ng \u0111\u1ec3 \u0111\u1ea9y b\u1ea1c ra kh\u1ecfi dung d\u1ecbch b\u1eb1ng ph\u1ea3n \u1ee9ng trao \u0111\u1ed5i.<\/p>\n\n\n\n
Nh\u01b0ng kh\u00f4ng ph\u1ea3i b\u1ea5t k\u1ef3 kim lo\u1ea1i n\u00e0o c\u0169ng c\u00f3 th\u1ec3 d\u00f9ng ph\u1ea3n \u1ee9ng trao \u0111\u1ed5i \u0111\u1ec3 \u0111\u1ea9y kim lo\u1ea1i \u0111\u00f3 ra kh\u1ecfi dung d\u1ecbch. B\u1ea1n th\u1eed d\u00f9ng m\u1ed9t d\u00e2y b\u1ea1c nh\u00fang v\u00e0o dung d\u1ecbch \u0111\u1ed3ng th\u00ec cho d\u00f9 b\u1ea1n c\u00f3 \u0111\u1ec3 k\u00e9o d\u00e0i h\u1ebft ng\u00e0y n\u00e0y sang ng\u00e0y kh\u00e1c, b\u1ea1n c\u0169ng kh\u00f4ng th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t “c\u00e2y \u0111\u1ed3ng” n\u00e0o t\u1eeb qu\u00e1 tr\u00ecnh n\u00e0y. B\u1edfi v\u00ec ch\u1ec9 c\u00f3 kim lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng h\u01a1n m\u1edbi \u0111\u1ea9y \u0111\u01b0\u1ee3c kim lo\u1ea1i \u00edt ho\u1ea1t \u0111\u1ed9ng h\u01a1n ra kh\u1ecfi dung d\u1ecbch mu\u1ed1i c\u1ee7a kim lo\u1ea1i \u0111\u00f3, n\u1ebfu l\u00e0m ng\u01b0\u1ee3c l\u1ea1i th\u00ec s\u1ebd kh\u00f4ng thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3. T\u1eeb c\u00e1c v\u00ed d\u1ee5 t\u1ea1o “c\u00e2y kim lo\u1ea1i” \u0111\u00e3 n\u00eau tr\u00ean ta th\u1ea5y: do k\u1ebdm ho\u1ea1t \u0111\u1ed9ng h\u01a1n ch\u00ec, c\u00f2n s\u1eaft ho\u1ea1t \u0111\u1ed9ng h\u01a1n \u0111\u1ed3ng n\u00ean ta c\u00f3 th\u1ec3 ti\u1ebfn h\u00e0nh ph\u1ea3n \u1ee9ng trao \u0111\u1ed5i. Nh\u1edd \u0111\u00f3 qua m\u1ed9t lo\u1ea1t ph\u1ea3n \u1ee9ng ho\u00e1 h\u1ecdc ti\u1ebfn h\u00e0nh, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 s\u1eafp x\u1ebfp c\u00e1c kim lo\u1ea1i th\u00e0nh d\u00e3y ho\u1ea1t \u0111\u1ed9ng: Nh\u00f4m, k\u1ebdm, s\u1eaft, \u0111\u1ed3ng, b\u1ea1c\u2026 v\u00e0 ch\u1ec9 c\u00f3 tu\u00e2n th\u1ee7 theo d\u00e3y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 tr\u00ean m\u1edbi c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c ph\u1ea3n \u1ee9ng trao \u0111\u1ed5i.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Ph\u1ea3n \u1ee9ng trao \u0111\u1ed5i; Kim lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00e1c b\u1ea1n \u0111\u00e3 t\u1eebng \u0111\u01b0\u1ee3c th\u1ea5y “c\u00e2y kim lo\u1ea1i” m\u1ecdc ra t\u1eeb m\u1ed9t s\u1ed1 dung d\u1ecbch mu\u1ed1i trong c\u00e1c th\u00ed nghi\u1ec7m ho\u00e1 h\u1ecdc ch\u01b0a? B\u1ea1n h\u00e3y l\u1ea5y m\u1ed9t b\u00ecnh c\u1ea7u th\u00ed nghi\u1ec7m \u0111\u00e1y b\u1eb1ng, cho v\u00e0o \u0111\u00f3 dung d\u1ecbch ch\u00ec axetat, kho\u1ea3ng n\u1eeda dung t\u00edch c\u1ee7a b\u00ecnh. \u0110\u1eady n\u1eafp b\u00ecnh b\u1eb1ng m\u1ed9t n\u00fat cao su. […]<\/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-7795","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\/7795","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=7795"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7795\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7795"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7795"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7795"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}