{"id":568958,"date":"2026-07-24T09:23:57","date_gmt":"2026-07-24T02:23:57","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=568958"},"modified":"2026-07-24T09:43:33","modified_gmt":"2026-07-24T02:43:33","slug":"este-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/este-la-gi\/","title":{"rendered":"Este l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c, t\u00ednh ch\u1ea5t, \u0111i\u1ec1u ch\u1ebf v\u00e0 b\u00e0i t\u1eadp"},"content":{"rendered":"<p>Este l\u00e0 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh khi nh\u00f3m \u2013OH trong ph\u00e2n t\u1eed axit cacboxylic \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng nh\u00f3m \u2013OR\u2032 (g\u1ed1c c\u1ee7a ancol), v\u1edbi c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t \u0111\u01a1n gi\u1ea3n l\u00e0 RCOOR\u2032. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng nh\u00f3m ch\u1ea5t quan tr\u1ecdng nh\u1ea5t c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh H\u00f3a h\u1ecdc h\u1eefu c\u01a1 l\u1edbp 12, xu\u1ea5t hi\u1ec7n nhi\u1ec1u trong \u0111\u1eddi s\u1ed1ng d\u01b0\u1edbi d\u1ea1ng h\u01b0\u01a1ng li\u1ec7u v\u00e0 dung m\u00f4i. Trong n\u1ed9i dung d\u01b0\u1edbi \u0111\u00e2y, b\u1ea1n s\u1ebd n\u1eafm \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t, t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc, c\u00e1ch \u0111i\u1ec1u ch\u1ebf, \u1ee9ng d\u1ee5ng c\u00f9ng b\u1ed9 b\u00e0i t\u1eadp este c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft \u0111\u1ec3 \u00f4n t\u1eadp hi\u1ec7u qu\u1ea3.<\/p>\n<h2>Este l\u00e0 g\u00ec?<\/h2>\n<p>Este l\u00e0 d\u1eabn xu\u1ea5t c\u1ee7a axit cacboxylic, trong \u0111\u00f3 nh\u00f3m hydroxyl (\u2013OH) c\u1ee7a axit \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng nh\u00f3m \u2013OR\u2032, v\u1edbi R\u2032 l\u00e0 g\u1ed1c hi\u0111rocacbon c\u1ee7a ancol. N\u00f3i c\u00e1ch kh\u00e1c, khi m\u1ed9t axit v\u00e0 m\u1ed9t <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/ancol-la-gi\/\">ancol<\/a> k\u1ebft h\u1ee3p v\u00e0 lo\u1ea1i \u0111i m\u1ed9t ph\u00e2n t\u1eed n\u01b0\u1edbc, s\u1ea3n ph\u1ea9m thu \u0111\u01b0\u1ee3c ch\u00ednh l\u00e0 este.<\/p>\n<p>V\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh: khi axit axetic (CH\u2083COOH) ph\u1ea3n \u1ee9ng v\u1edbi ancol etylic (C\u2082H\u2085OH), ph\u1ea3n \u1ee9ng t\u1ea1o ra este etyl axetat (CH\u2083COOC\u2082H\u2085) v\u00e0 n\u01b0\u1edbc. Nh\u00f3m nguy\u00ean t\u1eed \u2013COO\u2013 \u0111\u1eb7c tr\u01b0ng trong ph\u00e2n t\u1eed \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nh\u00f3m ch\u1ee9c este.<\/p>\n<p>Trong ph\u00e2n t\u1eed RCOOR\u2032, ph\u1ea7n R l\u00e0 g\u1ed1c c\u1ee7a axit (c\u00f3 th\u1ec3 l\u00e0 H ho\u1eb7c g\u1ed1c hi\u0111rocacbon), c\u00f2n R\u2032 lu\u00f4n l\u00e0 g\u1ed1c hi\u0111rocacbon c\u1ee7a ancol. C\u00e1ch g\u1ecdi t\u00ean este th\u01b0\u1eddng theo c\u1ea5u tr\u00fac: <em>t\u00ean g\u1ed1c ancol R\u2032 + t\u00ean g\u1ed1c axit RCOO (\u0111\u1ed5i \u0111u\u00f4i &#8220;ic&#8221; th\u00e0nh &#8220;at&#8221;)<\/em>. Ch\u1eb3ng h\u1ea1n CH\u2083COOC\u2082H\u2085 \u0111\u1ecdc l\u00e0 etyl axetat.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-569609 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-1.jpg\" alt=\"este-la-gi-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>C\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t c\u1ee7a este<\/h2>\n<p>Este \u0111\u01a1n ch\u1ee9c, no, m\u1ea1ch h\u1edf c\u00f3 c\u00f4ng th\u1ee9c chung l\u00e0 RCOOR\u2032, trong \u0111\u00f3 R c\u00f3 th\u1ec3 l\u00e0 H ho\u1eb7c g\u1ed1c hi\u0111rocacbon, c\u00f2n R\u2032 l\u00e0 g\u1ed1c hi\u0111rocacbon.<\/p>\n<ul>\n<li>C\u00f4ng th\u1ee9c ph\u00e2n t\u1eed c\u1ee7a este no, \u0111\u01a1n ch\u1ee9c, m\u1ea1ch h\u1edf l\u00e0 <strong>C\u2099H\u2082\u2099O\u2082<\/strong> (v\u1edbi n \u2265 2).<\/li>\n<li>Este \u0111\u01a1n gi\u1ea3n nh\u1ea5t l\u00e0 metyl fomat HCOOCH\u2083 (\u1ee9ng v\u1edbi n = 2).<\/li>\n<li>Kh\u1ed1i l\u01b0\u1ee3ng mol c\u1ee7a este no \u0111\u01a1n ch\u1ee9c m\u1ea1ch h\u1edf t\u00ednh theo c\u00f4ng th\u1ee9c: M = 14n + 32.<\/li>\n<\/ul>\n<p>Vi\u1ec7c thu\u1ed9c l\u00f2ng c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t C\u2099H\u2082\u2099O\u2082 gi\u00fap b\u1ea1n nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed khi bi\u1ebft kh\u1ed1i l\u01b0\u1ee3ng mol, \u0111\u00e2y l\u00e0 d\u1ea1ng b\u00e0i t\u1eadp r\u1ea5t ph\u1ed5 bi\u1ebfn trong \u0111\u1ec1 thi.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-569610 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-2.jpg\" alt=\"este-la-gi-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a este<\/h2>\n<p>Este c\u00f3 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m v\u1eadt l\u00fd kh\u00e1 ri\u00eang bi\u1ec7t so v\u1edbi axit v\u00e0 ancol t\u01b0\u01a1ng \u1ee9ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 m\u00f9i th\u01a1m d\u1ec5 ch\u1ecbu v\u00e0 kh\u1ea3 n\u0103ng tan k\u00e9m trong n\u01b0\u1edbc.<\/p>\n<ul>\n<li>L\u00e0 ch\u1ea5t l\u1ecfng ho\u1eb7c ch\u1ea5t r\u1eafn \u1edf \u0111i\u1ec1u ki\u1ec7n th\u01b0\u1eddng, nh\u1eb9 h\u01a1n n\u01b0\u1edbc.<\/li>\n<li>\u00cdt tan ho\u1eb7c kh\u00f4ng tan trong n\u01b0\u1edbc, do ph\u00e2n t\u1eed este kh\u00f4ng t\u1ea1o \u0111\u01b0\u1ee3c li\u00ean k\u1ebft hi\u0111ro v\u1edbi n\u01b0\u1edbc.<\/li>\n<li>Th\u01b0\u1eddng c\u00f3 m\u00f9i th\u01a1m \u0111\u1eb7c tr\u01b0ng c\u1ee7a hoa qu\u1ea3, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng l\u00e0m h\u01b0\u01a1ng li\u1ec7u.<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 s\u00f4i th\u1ea5p h\u01a1n axit v\u00e0 ancol c\u00f3 c\u00f9ng s\u1ed1 nguy\u00ean t\u1eed cacbon, v\u00ec gi\u1eefa c\u00e1c ph\u00e2n t\u1eed este kh\u00f4ng c\u00f3 li\u00ean k\u1ebft hi\u0111ro.<\/li>\n<\/ul>\n<p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 este quen thu\u1ed9c c\u00f9ng m\u00f9i \u0111\u1eb7c tr\u01b0ng c\u1ee7a ch\u00fang:<\/p>\n<table border=\"1\" cellpadding=\"8\" cellspacing=\"0\">\n<thead>\n<tr>\n<th>T\u00ean este<\/th>\n<th>C\u00f4ng th\u1ee9c<\/th>\n<th>M\u00f9i \u0111\u1eb7c tr\u01b0ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Etyl axetat<\/td>\n<td>CH\u2083COOC\u2082H\u2085<\/td>\n<td>M\u00f9i th\u01a1m nh\u1eb9, d\u00f9ng l\u00e0m dung m\u00f4i<\/td>\n<\/tr>\n<tr>\n<td>Isoamyl axetat<\/td>\n<td>CH\u2083COOC\u2085H\u2081\u2081<\/td>\n<td>M\u00f9i chu\u1ed1i ch\u00edn<\/td>\n<\/tr>\n<tr>\n<td>Etyl butirat<\/td>\n<td>C\u2083H\u2087COOC\u2082H\u2085<\/td>\n<td>M\u00f9i d\u1ee9a<\/td>\n<\/tr>\n<tr>\n<td>Benzyl axetat<\/td>\n<td>CH\u2083COOCH\u2082C\u2086H\u2085<\/td>\n<td>M\u00f9i hoa nh\u00e0i<\/td>\n<\/tr>\n<tr>\n<td>Etyl fomat<\/td>\n<td>HCOOC\u2082H\u2085<\/td>\n<td>M\u00f9i \u0111\u00e0o, r\u01b0\u1ee3u rum<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a este<\/h2>\n<p>Ph\u1ea3n \u1ee9ng \u0111\u1eb7c tr\u01b0ng v\u00e0 quan tr\u1ecdng nh\u1ea5t c\u1ee7a este l\u00e0 ph\u1ea3n \u1ee9ng th\u1ee7y ph\u00e2n. T\u00f9y m\u00f4i tr\u01b0\u1eddng m\u00e0 ph\u1ea3n \u1ee9ng di\u1ec5n ra theo hai h\u01b0\u1edbng kh\u00e1c nhau.<\/p>\n<p><strong>1. Th\u1ee7y ph\u00e2n trong m\u00f4i tr\u01b0\u1eddng axit:<\/strong> \u0111\u00e2y l\u00e0 ph\u1ea3n \u1ee9ng thu\u1eadn ngh\u1ecbch, t\u1ea1o l\u1ea1i axit cacboxylic v\u00e0 ancol ban \u0111\u1ea7u. \u0110\u00e2y c\u0169ng ch\u00ednh l\u00e0 ph\u1ea3n \u1ee9ng ngh\u1ecbch c\u1ee7a qu\u00e1 tr\u00ecnh este h\u00f3a.<\/p>\n<ul>\n<li>RCOOR\u2032 + H\u2082O \u21cc RCOOH + R\u2032OH (x\u00fac t\u00e1c H\u2082SO\u2084 lo\u00e3ng, \u0111un n\u00f3ng)<\/li>\n<li>V\u00ed d\u1ee5: CH\u2083COOC\u2082H\u2085 + H\u2082O \u21cc CH\u2083COOH + C\u2082H\u2085OH<\/li>\n<\/ul>\n<p><strong>2. Th\u1ee7y ph\u00e2n trong m\u00f4i tr\u01b0\u1eddng ki\u1ec1m (ph\u1ea3n \u1ee9ng x\u00e0 ph\u00f2ng h\u00f3a):<\/strong> \u0111\u00e2y l\u00e0 ph\u1ea3n \u1ee9ng m\u1ed9t chi\u1ec1u, t\u1ea1o mu\u1ed1i c\u1ee7a axit cacboxylic v\u00e0 ancol. Ph\u1ea3n \u1ee9ng n\u00e0y l\u00e0 c\u01a1 s\u1edf c\u1ee7a vi\u1ec7c s\u1ea3n xu\u1ea5t x\u00e0 ph\u00f2ng.<\/p>\n<ul>\n<li>RCOOR\u2032 + NaOH \u2192 RCOONa + R\u2032OH (\u0111un n\u00f3ng)<\/li>\n<li>V\u00ed d\u1ee5: CH\u2083COOC\u2082H\u2085 + NaOH \u2192 CH\u2083COONa + C\u2082H\u2085OH<\/li>\n<\/ul>\n<p>B\u1ea3ng so s\u00e1nh hai ph\u1ea3n \u1ee9ng th\u1ee7y ph\u00e2n c\u1ee7a este:<\/p>\n<table border=\"1\" cellpadding=\"8\" cellspacing=\"0\">\n<thead>\n<tr>\n<th>Ti\u00eau ch\u00ed<\/th>\n<th>Th\u1ee7y ph\u00e2n trong axit<\/th>\n<th>X\u00e0 ph\u00f2ng h\u00f3a (ki\u1ec1m)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>X\u00fac t\u00e1c\/t\u00e1c nh\u00e2n<\/td>\n<td>H\u2082SO\u2084 lo\u00e3ng, \u0111un n\u00f3ng<\/td>\n<td>Dung d\u1ecbch NaOH\/KOH, \u0111un n\u00f3ng<\/td>\n<\/tr>\n<tr>\n<td>Chi\u1ec1u ph\u1ea3n \u1ee9ng<\/td>\n<td>Thu\u1eadn ngh\u1ecbch (\u21cc)<\/td>\n<td>M\u1ed9t chi\u1ec1u (\u2192)<\/td>\n<\/tr>\n<tr>\n<td>S\u1ea3n ph\u1ea9m<\/td>\n<td>Axit + ancol<\/td>\n<td>Mu\u1ed1i + ancol<\/td>\n<\/tr>\n<tr>\n<td>\u1ee8ng d\u1ee5ng<\/td>\n<td>Thu h\u1ed3i axit, ancol<\/td>\n<td>S\u1ea3n xu\u1ea5t x\u00e0 ph\u00f2ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img decoding=\"async\" class=\"size-full wp-image-569611 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-3.jpg\" alt=\"este-la-gi-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>Xem th\u00eam: <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/tinh-khu-la-gi\/\">T\u00ednh Kh\u1eed L\u00e0 G\u00ec? To\u00e0n T\u1eadp Ki\u1ebfn Th\u1ee9c V\u1ec1 T\u00ednh Kh\u1eed v\u00e0 Oxi H\u00f3a Trong H\u00f3a H\u1ecdc<\/a><\/strong><\/p>\n<h2>\u0110i\u1ec1u ch\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a este<\/h2>\n<p>Este \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf ch\u1ee7 y\u1ebfu b\u1eb1ng ph\u1ea3n \u1ee9ng este h\u00f3a, trong \u0111\u00f3 axit cacboxylic ph\u1ea3n \u1ee9ng v\u1edbi ancol khi c\u00f3 x\u00fac t\u00e1c axit sunfuric \u0111\u1eb7c v\u00e0 \u0111un n\u00f3ng. \u0110\u00e2y l\u00e0 ph\u1ea3n \u1ee9ng thu\u1eadn ngh\u1ecbch, mu\u1ed1n t\u0103ng <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/hieu-suat\/\">hi\u1ec7u su\u1ea5t<\/a> ng\u01b0\u1eddi ta th\u01b0\u1eddng d\u00f9ng d\u01b0 m\u1ed9t ch\u1ea5t ho\u1eb7c t\u00e1ch b\u1edbt n\u01b0\u1edbc ra kh\u1ecfi h\u1ec7.<\/p>\n<ul>\n<li>Ph\u01b0\u01a1ng tr\u00ecnh t\u1ed5ng qu\u00e1t: RCOOH + R\u2032OH \u21cc RCOOR\u2032 + H\u2082O (H\u2082SO\u2084 \u0111\u1eb7c, t\u00b0)<\/li>\n<li>V\u00ed d\u1ee5 c\u1ee5 th\u1ec3: CH\u2083COOH + C\u2082H\u2085OH \u21cc CH\u2083COOC\u2082H\u2085 + H\u2082O<\/li>\n<\/ul>\n<p>Nh\u1edd c\u00f3 m\u00f9i th\u01a1m v\u00e0 kh\u1ea3 n\u0103ng h\u00f2a tan t\u1ed1t, este \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong \u0111\u1eddi s\u1ed1ng v\u00e0 s\u1ea3n xu\u1ea5t:<\/p>\n<ul>\n<li>L\u00e0m h\u01b0\u01a1ng li\u1ec7u trong th\u1ef1c ph\u1ea9m, b\u00e1nh k\u1eb9o, n\u01b0\u1edbc gi\u1ea3i kh\u00e1t v\u00e0 m\u1ef9 ph\u1ea9m.<\/li>\n<li>L\u00e0m dung m\u00f4i h\u00f2a tan c\u00e1c ch\u1ea5t h\u1eefu c\u01a1 trong s\u01a1n, keo d\u00e1n, m\u1ef1c in.<\/li>\n<li>L\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t x\u00e0 ph\u00f2ng, ch\u1ea5t d\u1ebbo v\u00e0 m\u1ed9t s\u1ed1 polime.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-569612 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-4.jpg\" alt=\"este-la-gi-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>V\u00ed d\u1ee5 v\u00e0 b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng c\u00f3 l\u1eddi gi\u1ea3i<\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp ti\u00eau bi\u1ec3u v\u1ec1 este, t\u1eeb nh\u1eadn bi\u1ebft \u0111\u1ebfn t\u00ednh to\u00e1n x\u00e1c \u0111\u1ecbnh c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed, k\u00e8m l\u1eddi gi\u1ea3i t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 b\u1ea1n d\u1ec5 theo d\u00f5i.<\/p>\n<p><strong>B\u00e0i 1.<\/strong> Vi\u1ebft c\u00f4ng th\u1ee9c v\u00e0 g\u1ecdi t\u00ean este t\u1ea1o b\u1edfi axit axetic v\u00e0 ancol metylic.<\/p>\n<p><em>L\u1eddi gi\u1ea3i:<\/em> Axit axetic l\u00e0 CH\u2083COOH, ancol metylic l\u00e0 CH\u2083OH. Ph\u1ea3n \u1ee9ng este h\u00f3a t\u1ea1o ra este CH\u2083COOCH\u2083, g\u1ecdi t\u00ean l\u00e0 <strong>metyl axetat<\/strong>. Ph\u01b0\u01a1ng tr\u00ecnh: CH\u2083COOH + CH\u2083OH \u21cc CH\u2083COOCH\u2083 + H\u2082O.<\/p>\n<p><strong>B\u00e0i 2.<\/strong> X\u00e0 ph\u00f2ng h\u00f3a ho\u00e0n to\u00e0n 8,8 gam m\u1ed9t este no, \u0111\u01a1n ch\u1ee9c, m\u1ea1ch h\u1edf X c\u1ea7n v\u1eeba \u0111\u1ee7 100 ml dung d\u1ecbch NaOH 1M. X\u00e1c \u0111\u1ecbnh c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed c\u1ee7a X.<\/p>\n<p><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<ul>\n<li>S\u1ed1 mol NaOH: n(NaOH) = 0,1 \u00d7 1 = 0,1 mol.<\/li>\n<li>V\u00ec X l\u00e0 este \u0111\u01a1n ch\u1ee9c n\u00ean n(X) = n(NaOH) = 0,1 mol.<\/li>\n<li>Kh\u1ed1i l\u01b0\u1ee3ng mol c\u1ee7a X: M = 8,8 \u00f7 0,1 = 88 (g\/mol).<\/li>\n<li>V\u1edbi este no \u0111\u01a1n ch\u1ee9c m\u1ea1ch h\u1edf C\u2099H\u2082\u2099O\u2082: M = 14n + 32 = 88 \u21d2 14n = 56 \u21d2 n = 4.<\/li>\n<li>V\u1eady c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed c\u1ee7a X l\u00e0 <strong>C\u2084H\u2088O\u2082<\/strong> (v\u00ed d\u1ee5 etyl axetat CH\u2083COOC\u2082H\u2085 ho\u1eb7c metyl propionat C\u2082H\u2085COOCH\u2083).<\/li>\n<\/ul>\n<p><strong>B\u00e0i 3.<\/strong> Este X c\u00f3 c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed C\u2083H\u2086O\u2082. Khi x\u00e0 ph\u00f2ng h\u00f3a X b\u1eb1ng dung d\u1ecbch NaOH thu \u0111\u01b0\u1ee3c mu\u1ed1i Y v\u00e0 ancol Z. X\u00e1c \u0111\u1ecbnh c\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o c\u00f3 th\u1ec3 c\u00f3 c\u1ee7a X, Y, Z.<\/p>\n<p><em>L\u1eddi gi\u1ea3i:<\/em> C\u2083H\u2086O\u2082 \u1ee9ng v\u1edbi c\u00f4ng th\u1ee9c C\u2099H\u2082\u2099O\u2082 v\u1edbi n = 3, l\u00e0 este no \u0111\u01a1n ch\u1ee9c m\u1ea1ch h\u1edf. C\u00f3 hai c\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o ph\u00f9 h\u1ee3p:<\/p>\n<ul>\n<li>HCOOC\u2082H\u2085 (etyl fomat): HCOOC\u2082H\u2085 + NaOH \u2192 HCOONa + C\u2082H\u2085OH. Y l\u00e0 HCOONa, Z l\u00e0 C\u2082H\u2085OH.<\/li>\n<li>CH\u2083COOCH\u2083 (metyl axetat): CH\u2083COOCH\u2083 + NaOH \u2192 CH\u2083COONa + CH\u2083OH. Y l\u00e0 CH\u2083COONa, Z l\u00e0 CH\u2083OH.<\/li>\n<\/ul>\n<p><strong>B\u00e0i 4 (tr\u1eafc nghi\u1ec7m).<\/strong> Este th\u01b0\u1eddng c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m n\u00e0o sau \u0111\u00e2y? A. Tan t\u1ed1t trong n\u01b0\u1edbc; B. C\u00f3 m\u00f9i th\u01a1m hoa qu\u1ea3; C. L\u00e0 axit m\u1ea1nh; D. D\u1eabn \u0111i\u1ec7n t\u1ed1t.<\/p>\n<p><em>\u0110\u00e1p \u00e1n:<\/em> B. Este \u00edt tan trong n\u01b0\u1edbc, kh\u00f4ng ph\u1ea3i axit v\u00e0 kh\u00f4ng d\u1eabn \u0111i\u1ec7n, nh\u01b0ng c\u00f3 m\u00f9i th\u01a1m \u0111\u1eb7c tr\u01b0ng c\u1ee7a hoa qu\u1ea3.<\/p>\n<p><strong>Xem th\u00eam: <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/can-bang-phuong-trinh-hoa-hoc\/\">C\u00e1ch c\u00e2n b\u1eb1ng ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc nhanh v\u00e0 ch\u00ednh x\u00e1c<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-569613 aligncenter\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-5.jpg\" alt=\"este-la-gi-5\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/este-la-gi-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 este<\/h2>\n<h3>Este l\u00e0 g\u00ec?<\/h3>\n<p>Este l\u00e0 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh khi thay nh\u00f3m \u2013OH c\u1ee7a axit cacboxylic b\u1eb1ng nh\u00f3m \u2013OR\u2032 (g\u1ed1c c\u1ee7a ancol), c\u00f3 c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t \u0111\u01a1n gi\u1ea3n l\u00e0 RCOOR\u2032.<\/p>\n<h3>C\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t c\u1ee7a este l\u00e0 g\u00ec?<\/h3>\n<p>Este \u0111\u01a1n ch\u1ee9c c\u00f3 d\u1ea1ng RCOOR\u2032; ri\u00eang este no, \u0111\u01a1n ch\u1ee9c, m\u1ea1ch h\u1edf c\u00f3 c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed C\u2099H\u2082\u2099O\u2082 v\u1edbi n \u2265 2.<\/p>\n<h3>Ph\u1ea3n \u1ee9ng \u0111\u1eb7c tr\u01b0ng c\u1ee7a este l\u00e0 g\u00ec?<\/h3>\n<p>\u0110\u00f3 l\u00e0 ph\u1ea3n \u1ee9ng th\u1ee7y ph\u00e2n, g\u1ed3m th\u1ee7y ph\u00e2n trong m\u00f4i tr\u01b0\u1eddng axit (thu\u1eadn ngh\u1ecbch) v\u00e0 th\u1ee7y ph\u00e2n trong m\u00f4i tr\u01b0\u1eddng ki\u1ec1m hay c\u00f2n g\u1ecdi l\u00e0 ph\u1ea3n \u1ee9ng x\u00e0 ph\u00f2ng h\u00f3a (m\u1ed9t chi\u1ec1u).<\/p>\n<h3>Ph\u1ea3n \u1ee9ng este h\u00f3a l\u00e0 g\u00ec?<\/h3>\n<p>L\u00e0 ph\u1ea3n \u1ee9ng gi\u1eefa axit cacboxylic v\u00e0 ancol t\u1ea1o th\u00e0nh este v\u00e0 n\u01b0\u1edbc, c\u00f3 x\u00fac t\u00e1c H\u2082SO\u2084 \u0111\u1eb7c v\u00e0 \u0111un n\u00f3ng. \u0110\u00e2y l\u00e0 ph\u1ea3n \u1ee9ng thu\u1eadn ngh\u1ecbch.<\/p>\n<h3>Ph\u1ea3n \u1ee9ng x\u00e0 ph\u00f2ng h\u00f3a l\u00e0 g\u00ec?<\/h3>\n<p>L\u00e0 ph\u1ea3n \u1ee9ng th\u1ee7y ph\u00e2n este trong m\u00f4i tr\u01b0\u1eddng ki\u1ec1m (NaOH ho\u1eb7c KOH), t\u1ea1o ra mu\u1ed1i c\u1ee7a axit v\u00e0 ancol. Ph\u1ea3n \u1ee9ng x\u1ea3y ra m\u1ed9t chi\u1ec1u v\u00e0 l\u00e0 c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t x\u00e0 ph\u00f2ng.<\/p>\n<h3>Este c\u00f3 m\u00f9i g\u00ec?<\/h3>\n<p>Este th\u01b0\u1eddng c\u00f3 m\u00f9i th\u01a1m d\u1ec5 ch\u1ecbu c\u1ee7a hoa qu\u1ea3, v\u00ed d\u1ee5 isoamyl axetat c\u00f3 m\u00f9i chu\u1ed1i, etyl butirat c\u00f3 m\u00f9i d\u1ee9a, benzyl axetat c\u00f3 m\u00f9i hoa nh\u00e0i.<\/p>\n<h3>V\u00ec sao este \u00edt tan trong n\u01b0\u1edbc?<\/h3>\n<p>V\u00ec ph\u00e2n t\u1eed este kh\u00f4ng t\u1ea1o \u0111\u01b0\u1ee3c li\u00ean k\u1ebft hi\u0111ro v\u1edbi n\u01b0\u1edbc, n\u00ean \u0111\u1ed9 tan trong n\u01b0\u1edbc r\u1ea5t k\u00e9m v\u00e0 este th\u01b0\u1eddng n\u1ed5i l\u00ean tr\u00ean m\u1eb7t n\u01b0\u1edbc.<\/p>\n<h3>Este kh\u00e1c axit cacboxylic \u1edf \u0111i\u1ec3m n\u00e0o?<\/h3>\n<p>Axit cacboxylic c\u00f3 nh\u00f3m \u2013COOH t\u1ea1o \u0111\u01b0\u1ee3c li\u00ean k\u1ebft hi\u0111ro n\u00ean tan t\u1ed1t v\u00e0 c\u00f3 nhi\u1ec7t \u0111\u1ed9 s\u00f4i cao; c\u00f2n este c\u00f3 nh\u00f3m \u2013COO\u2013, \u00edt tan, nhi\u1ec7t \u0111\u1ed9 s\u00f4i th\u1ea5p h\u01a1n v\u00e0 c\u00f3 m\u00f9i th\u01a1m.<\/p>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\"@type\":\"Question\",\"name\":\"Este l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Este l\u00e0 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh khi thay nh\u00f3m \u2013OH c\u1ee7a axit cacboxylic b\u1eb1ng nh\u00f3m \u2013OR\u2032 (g\u1ed1c c\u1ee7a ancol), c\u00f3 c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t \u0111\u01a1n gi\u1ea3n l\u00e0 RCOOR\u2032.\"}},\n    {\"@type\":\"Question\",\"name\":\"C\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t c\u1ee7a este l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Este \u0111\u01a1n ch\u1ee9c c\u00f3 d\u1ea1ng RCOOR\u2032; ri\u00eang este no, \u0111\u01a1n ch\u1ee9c, m\u1ea1ch h\u1edf c\u00f3 c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed CnH2nO2 v\u1edbi n \u2265 2.\"}},\n    {\"@type\":\"Question\",\"name\":\"Ph\u1ea3n \u1ee9ng \u0111\u1eb7c tr\u01b0ng c\u1ee7a este l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"\u0110\u00f3 l\u00e0 ph\u1ea3n \u1ee9ng th\u1ee7y ph\u00e2n, g\u1ed3m th\u1ee7y ph\u00e2n trong m\u00f4i tr\u01b0\u1eddng axit (thu\u1eadn ngh\u1ecbch) v\u00e0 th\u1ee7y ph\u00e2n trong m\u00f4i tr\u01b0\u1eddng ki\u1ec1m hay c\u00f2n g\u1ecdi l\u00e0 ph\u1ea3n \u1ee9ng x\u00e0 ph\u00f2ng h\u00f3a (m\u1ed9t chi\u1ec1u).\"}},\n    {\"@type\":\"Question\",\"name\":\"Ph\u1ea3n \u1ee9ng este h\u00f3a l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"L\u00e0 ph\u1ea3n \u1ee9ng gi\u1eefa axit cacboxylic v\u00e0 ancol t\u1ea1o th\u00e0nh este v\u00e0 n\u01b0\u1edbc, c\u00f3 x\u00fac t\u00e1c H2SO4 \u0111\u1eb7c v\u00e0 \u0111un n\u00f3ng. \u0110\u00e2y l\u00e0 ph\u1ea3n \u1ee9ng thu\u1eadn ngh\u1ecbch.\"}},\n    {\"@type\":\"Question\",\"name\":\"Ph\u1ea3n \u1ee9ng x\u00e0 ph\u00f2ng h\u00f3a l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"L\u00e0 ph\u1ea3n \u1ee9ng th\u1ee7y ph\u00e2n este trong m\u00f4i tr\u01b0\u1eddng ki\u1ec1m (NaOH ho\u1eb7c KOH), t\u1ea1o ra mu\u1ed1i c\u1ee7a axit v\u00e0 ancol. Ph\u1ea3n \u1ee9ng x\u1ea3y ra m\u1ed9t chi\u1ec1u v\u00e0 l\u00e0 c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t x\u00e0 ph\u00f2ng.\"}},\n    {\"@type\":\"Question\",\"name\":\"Este c\u00f3 m\u00f9i g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Este th\u01b0\u1eddng c\u00f3 m\u00f9i th\u01a1m d\u1ec5 ch\u1ecbu c\u1ee7a hoa qu\u1ea3, v\u00ed d\u1ee5 isoamyl axetat c\u00f3 m\u00f9i chu\u1ed1i, etyl butirat c\u00f3 m\u00f9i d\u1ee9a, benzyl axetat c\u00f3 m\u00f9i hoa nh\u00e0i.\"}},\n    {\"@type\":\"Question\",\"name\":\"V\u00ec sao este \u00edt tan trong n\u01b0\u1edbc?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"V\u00ec ph\u00e2n t\u1eed este kh\u00f4ng t\u1ea1o \u0111\u01b0\u1ee3c li\u00ean k\u1ebft hi\u0111ro v\u1edbi n\u01b0\u1edbc, n\u00ean \u0111\u1ed9 tan trong n\u01b0\u1edbc r\u1ea5t k\u00e9m v\u00e0 este th\u01b0\u1eddng n\u1ed5i l\u00ean tr\u00ean m\u1eb7t n\u01b0\u1edbc.\"}},\n    {\"@type\":\"Question\",\"name\":\"Este kh\u00e1c axit cacboxylic \u1edf \u0111i\u1ec3m n\u00e0o?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Axit cacboxylic c\u00f3 nh\u00f3m \u2013COOH t\u1ea1o \u0111\u01b0\u1ee3c li\u00ean k\u1ebft hi\u0111ro n\u00ean tan t\u1ed1t v\u00e0 c\u00f3 nhi\u1ec7t \u0111\u1ed9 s\u00f4i cao; c\u00f2n este c\u00f3 nh\u00f3m \u2013COO\u2013, \u00edt tan, nhi\u1ec7t \u0111\u1ed9 s\u00f4i th\u1ea5p h\u01a1n v\u00e0 c\u00f3 m\u00f9i th\u01a1m.\"}}\n  ]\n}\n<\/script><\/p>\n<p><strong>Xem th\u00eam: <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/anken\/\">Anken l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c, t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc v\u00e0 b\u00e0i t\u1eadp<\/a><\/strong><\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>T\u00f3m l\u1ea1i, este l\u00e0 d\u1eabn xu\u1ea5t c\u1ee7a axit cacboxylic c\u00f3 c\u00f4ng th\u1ee9c RCOOR\u2032, \u00edt tan trong n\u01b0\u1edbc, c\u00f3 m\u00f9i th\u01a1m hoa qu\u1ea3 v\u00e0 ph\u1ea3n \u1ee9ng \u0111\u1eb7c tr\u01b0ng l\u00e0 th\u1ee7y ph\u00e2n c\u00f9ng x\u00e0 ph\u00f2ng h\u00f3a. N\u1eafm v\u1eefng t\u00ednh ch\u1ea5t v\u00e0 c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp c\u1ee7a este s\u1ebd gi\u00fap b\u1ea1n h\u1ecdc t\u1ed1t ph\u1ea7n h\u00f3a h\u1eefu c\u01a1 l\u1edbp 12. \u0110\u1ec3 \u00f4n th\u00eam ki\u1ebfn th\u1ee9c li\u00ean quan, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o b\u00e0i <strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/andehit-la-gi\/\">An\u0111ehit l\u00e0 g\u00ec<\/a><\/strong> v\u00e0 nhi\u1ec1u b\u00e0i vi\u1ebft kh\u00e1c tr\u00ean chuy\u00ean m\u1ee5c tin t\u1ee9c H\u00f3a h\u1ecdc c\u1ee7a Ho\u00e0ng H\u00e0 Mobile.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Este l\u00e0 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh khi nh\u00f3m \u2013OH trong ph\u00e2n t\u1eed axit cacboxylic \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng nh\u00f3m \u2013OR\u2032 (g\u1ed1c c\u1ee7a ancol), v\u1edbi c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t \u0111\u01a1n gi\u1ea3n l\u00e0 RCOOR\u2032. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng nh\u00f3m ch\u1ea5t quan tr\u1ecdng nh\u1ea5t c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh H\u00f3a h\u1ecdc h\u1eefu c\u01a1 l\u1edbp 12, xu\u1ea5t [&hellip;]<\/p>\n","protected":false},"author":65,"featured_media":569608,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"este","_yoast_wpseo_title":"Este l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c, t\u00ednh ch\u1ea5t v\u00e0 \u0111i\u1ec1u ch\u1ebf","_yoast_wpseo_metadesc":"Este l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c RCOOR\u2032, t\u00ednh ch\u1ea5t, ph\u1ea3n \u1ee9ng este h\u00f3a, x\u00e0 ph\u00f2ng h\u00f3a v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft. T\u00ecm hi\u1ec3u ngay c\u00f9ng Ho\u00e0ng H\u00e0 Mobile!","footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-568958","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kham-pha","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Este l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c, t\u00ednh ch\u1ea5t v\u00e0 \u0111i\u1ec1u ch\u1ebf<\/title>\n<meta name=\"description\" content=\"Este l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c RCOOR\u2032, t\u00ednh ch\u1ea5t, ph\u1ea3n \u1ee9ng este h\u00f3a, x\u00e0 ph\u00f2ng h\u00f3a v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft. T\u00ecm hi\u1ec3u ngay c\u00f9ng Ho\u00e0ng H\u00e0 Mobile!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/este-la-gi\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Este l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c, t\u00ednh ch\u1ea5t, \u0111i\u1ec1u ch\u1ebf v\u00e0 b\u00e0i t\u1eadp\" \/>\n<meta property=\"og:description\" content=\"Este l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c RCOOR\u2032, t\u00ednh ch\u1ea5t, ph\u1ea3n \u1ee9ng este h\u00f3a, x\u00e0 ph\u00f2ng h\u00f3a v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft. 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