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{"id":25527,"date":"2018-04-06T15:56:27","date_gmt":"2018-04-06T08:56:27","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=25527"},"modified":"2018-04-06T15:56:27","modified_gmt":"2018-04-06T08:56:27","slug":"chuong-1-bai-2-lipit-2","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-1-bai-2-lipit-2\/","title":{"rendered":"Ch\u01b0\u01a1ng 1 – B\u00e0i 2: Lipit"},"content":{"rendered":"

B\u00e0i 1 (trang 12 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0H\u00e3y ch\u1ecdn nh\u1eadn \u0111\u1ecbnh \u0111\u00fang :<\/strong><\/p>\n

A. Lipit l\u00e0 ch\u1ea5t b\u00e9o<\/p>\n

B. Lipit l\u00e0 t\u00ean g\u1ecdi chung cho d\u1ea7u m\u1ee1 \u0111\u1ed9ng th\u1ef1c v\u1eadt<\/p>\n

C. Lipti l\u00e0 este c\u1ee7a glixerol v\u1edbi c\u00e1c axit b\u00e9o<\/p>\n

D. Lipit l\u00e0 nh\u1eefng h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 c\u00f3 trong t\u1ebf b\u00e0o s\u1ed1ng, kh\u00f4ng h\u00f2a tan trong n\u01b0\u1edbc nh\u01b0ng h\u00f2a tan trong c\u00e1c dung m\u00f4i h\u1eefu c\u01a1 kh\u00f4ng ph\u00e2n c\u1ef1c. Lipit bao g\u1ed3m ch\u1ea5t b\u00e9o, s\u00e1p, steroit, photpholipit,…<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

\u0110\u00e1p \u00e1n D<\/p>\n

B\u00e0i 2 (trang 12 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0a. H\u00e3y ph\u00e2n bi\u1ec7t c\u00e1c kh\u00e1i ni\u1ec7m : lipit, ch\u1ea5t b\u00e9o, d\u1ea7u \u0103n, m\u1ee1 \u0103n<\/strong><\/p>\n

b. V\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc d\u1ea7u m\u1ee1 \u0103n kh\u00e1c d\u1ea7u m\u1ee1 b\u00f4i tr\u01a1n m\u00e1y nh\u01b0 th\u1ebf n\u00e0o?<\/strong><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

a. C\u00e1c kh\u00e1i ni\u1ec7m<\/p>\n

– Lipit : L\u00e0 nh\u1eefng h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 c\u00f3 trong t\u1ebf b\u00e0o s\u1ed1ng, kh\u00f4ng h\u00f2a tan trong n\u01b0\u1edbc nh\u01b0ng h\u00f2a tan trong c\u00e1c dung m\u00f4i kh\u00f4ng ph\u00e2n c\u1ef1c. Litpit ch\u1ea5t b\u00e9o, s\u00e1p, steroit, photpho lipit,…<\/p>\n

– Ch\u1ea5t b\u00e9o (m\u1ed9t trong c\u00e1c lo\u1ea1i lipit) : l\u00e0 trieste c\u1ee7a glixerol v\u1edbi c\u00e1c axit c\u00f3 m\u1ea1ch cacbon d\u00e0i kh\u00f4ng ph\u00e2n nh\u00e1nh( c\u00e1c axit b\u00e9o). Ch\u1ea5t b\u00e9o c\u00f2n g\u1ecdi l\u00e0 triglixerit.<\/p>\n

– D\u1ea7u \u0103n (m\u1ed9t lo\u1ea1i ch\u1ea5t b\u00e9o) : l\u00e0 c\u00e1c triglixerit ch\u1ee9a ch\u1ee7 y\u1ebfu c\u00e1c g\u1ed1c axit b\u00e9o kh\u00f4ng no<\/p>\n

– M\u1ee1 \u0103n (m\u1ed9t lo\u1ea1i ch\u1ea5t b\u00e9o) : L\u00e0 c\u00e1c triglixerit ch\u1ee9a ch\u1ee7 y\u1ebfu c\u00e1c g\u1ed1c axit b\u00e9o no<\/p>\n

b. V\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc d\u1ea7u, m\u1ee1 \u0103n c\u00f3 b\u1ea3n ch\u1ea5t kh\u00e1c ho\u00e0n to\u00e0n v\u1edbi d\u1ea7u m\u1ee1 b\u00f4i tr\u01a1n m\u00e1y :<\/p>\n

– D\u1ea7u m\u1ee1 \u0103n l\u00e0 c\u00e1c triglixerit (ch\u1ea5t b\u00e9o) thu\u1ed9c lo\u1ea1i este \u0111a ch\u1ee9c, \u0111\u01b0\u1ee3c t\u1ea1o t\u1eeb glixerol v\u00e0 c\u00e1c axit b\u00e9o<\/p>\n

– D\u1ea7u m\u1ee1 b\u00f4i tr\u01a1n m\u00e1y l\u00e0 h\u1ed7n h\u1ee3p c\u00e1c hidrocacbon r\u1eafn<\/p>\n

B\u00e0i 3 (trang 12 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Cho b\u1ea3ng s\u1ed1 li\u1ec7u sau:<\/strong><\/p>\n\n\n\n\n\n\n
Axit b\u00e9o (o<\/sup>C)<\/td>\nAxit stearic<\/td>\nAxit panmitic<\/td>\nAxit oleic<\/td>\n<\/tr>\n
tnc<\/sub>o<\/sup>(o<\/sup>C)<\/td>\n69,6<\/td>\n63,1<\/td>\n13,4<\/td>\n<\/tr>\n
Triglixerit<\/td>\nTristearin<\/td>\nPripanmetin<\/td>\nTriolein<\/td>\n<\/tr>\n
tnc<\/sub>o<\/sup>(o<\/sup>C)<\/td>\n71,5<\/td>\n65,5<\/td>\n-5,5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

a. Vi\u1ebft c\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o c\u1ee7a c\u00e1c ch\u1ea5t b\u00e9o n\u00f3i tr\u00ean?<\/p>\n

b. D\u1ea7u h\u01b0\u1edbng d\u01b0\u01a1ng c\u00f3 h\u00e0m l\u01b0\u1ee3ng oleat (g\u1ed1c c\u1ee7a axit oleic) v\u00e0 g\u1ed1c linoleat(g\u1ed1c c\u1ee7a axit linoleic) t\u1edbi 85%. D\u1ea7u ca cao c\u00f3 h\u00e0m l\u01b0\u1ee3ng g\u1ed1c stearat v\u00e0 panmitat t\u1edbi 75%. H\u1ecfi d\u1ea7u n\u00e0o \u0111\u00f4ng \u0111\u1eb7c \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n. V\u00ec sao?<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

a. C\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o c\u1ee7a c\u00e1c ch\u1ea5t b\u00e9o<\/p>\n

\"\"<\/p>\n

b. D\u1ea7u h\u01b0\u1edbng d\u01b0\u01a1ng \u0111\u00f4ng \u0111\u1eb7c \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n do th\u00e0nh ph\u1ea7n c\u1ee7a n\u00f3 ch\u1ee9a ch\u1ee7 y\u1ebfu l\u00e0 c\u00e1c axit b\u00e9o kh\u00f4ng no<\/p>\n

B\u00e0i 4 (trang 13 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0a. V\u00ec sao ch\u1ea5t b\u00e9o kh\u00f4ng tan trong n\u01b0\u1edbc m\u00e0 tan trong c\u00e1c dung m\u00f4i h\u1eefu v\u01a1 kh\u00f4ng ph\u00e2n c\u1ef1c.<\/strong><\/p>\n

b. So s\u00e1nh nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y, nhi\u1ec7t \u0111\u1ed9 s\u00f4i triglixerit ch\u1ee9a c\u00e1c g\u1ed1c axit b\u00e9o no v\u00e0 triglixerit ch\u1ee9a c\u00e1c g\u1ed1c axit b\u00e9o kh\u00f4ng no.<\/strong><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

a. Ch\u1ea5t b\u00e9o l\u00e0 c\u00e1c ch\u1ea5t h\u1eefu c\u01a1 kh\u00f4ng ph\u00e2n c\u1ef1c n\u00ean tan \u0111\u01b0\u1ee3c trong c\u00e1c dung m\u00f4i kh\u00f4ng ph\u00e2n c\u1ef1c v\u00e0 kh\u00f4ng tan \u0111\u01b0\u1ee3c trong c\u00e1c dung m\u00f4i ph\u00e2n c\u1ef1c nh\u01b0 n\u01b0\u1edbc.<\/p>\n

b. Nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y, nhi\u1ec7t \u0111\u1ed9 s\u00f4i c\u1ee7a c\u00e1c triglixerit ch\u1ee9a c\u00e1c g\u1ed1c axit b\u00e9o no cao h\u01a1n c\u00e1c triglixerit ch\u1ee9a c\u00e1c g\u1ed1c axit b\u00e9o kh\u00f4ng no<\/p>\n

B\u00e0i 5 (trang 13 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ph\u1ea3n \u1ee9ng c\u1ee7a ch\u1ea5t b\u00e9o c\u00f3 c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed nh\u01b0 sau:<\/strong><\/p>\n

\"\"<\/p>\n

a.V\u1edbi dung d\u1ecbch KOH \u0111un n\u00f3ng.<\/p>\n

b. V\u1edbi I2<\/sub>\u00a0d\u01b0<\/p>\n

c. V\u1edbi H2<\/sub>\u00a0d\u01b0. C\u00f3 Ni x\u00fac t\u00e1c, \u1edf nhi\u1ec7t \u0111\u1ed9 \u00e1p su\u1ea5t cao<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

C\u00e1c ph\u01b0\u01a1ng tr\u00ecnh h\u00f3a h\u1ecdc<\/p>\n

a. V\u1edbi KOH<\/p>\n

\"\"<\/p>\n

b. V\u1edbi I2<\/sub>\u00a0d\u01b0 :<\/p>\n

\"\"<\/p>\n

c. V\u1edbi H2<\/sub>\u00a0d\u01b0<\/p>\n

\"\"<\/p>\n

B\u00e0i 6 (trang 13 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0\u0110\u1ec3 \u0111\u00e1nh gi\u00e1 l\u01b0\u1ee3ng axit b\u00e9o t\u1ef1 do c\u00f3 trong ch\u1ea5t b\u00e9o ng\u01b0\u1eddi ta d\u00f9ng ch\u1ec9 s\u1ed1 axit. \u0110\u00f3 l\u00e0 s\u1ed1 miligam KOH c\u1ea7n \u0111\u1ec3 trung h\u00f2a axit b\u00e9o t\u1ef1 do c\u00f3 trong m\u1ed9t gam ch\u1ea5t b\u00e9o(n\u00f3i g\u1ecdn l\u00e0 trung h\u00f2a m\u1ed9t gam ch\u1ea5t b\u00e9o).<\/strong><\/p>\n

a. T\u00ednh ch\u1ec9 s\u1ed1 axit c\u1ee7a m\u1ed9t ch\u1ea5t b\u00e9o bi\u1ebft r\u1eb1ng \u0111\u1ec3 trung h\u00f2a 14g ch\u1ea5t b\u00e9o \u0111\u00f3 c\u1ea7n d\u00f9ng 15 ml dung d\u1ecbch KOH 0,1M.<\/strong><\/p>\n

b. T\u00ednh kh\u1ed1i l\u01b0\u1ee3ng NaOH c\u1ea7n thi\u1ebft \u0111\u1ec3 trung h\u00f2a 10 gam ch\u1ea5t b\u00e9o c\u00f3 ch\u1ec9 s\u1ed1 axit l\u00e0 5,6.<\/strong><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

a. nKOH<\/sub>\u00a0= 0,015.0,1= 0,0015 mol<\/p>\n

=> mKOH<\/sub>\u00a0= 0,0015.56 = 0,084 gam = 84 mg.<\/p>\n

\u0110\u1ec3 trung h\u00f2a 14 gam ch\u1ea5t b\u00e9o c\u1ea7n 84 mg KOH<\/p>\n

=> \u0110\u1ec3 trung h\u00f2a 1 gam ch\u1ea5t b\u00e9o c\u1ea7n 84 : 14 = 6 mg KOH<\/p>\n

V\u1eady ch\u1ec9 s\u1ed1 axit l\u00e0 6<\/p>\n

b. Ch\u1ec9 s\u1ed1 axit c\u1ee7a ch\u1ea5t b\u00e9o l\u00e0 5,6 t\u1ee9c l\u00e0 :<\/p>\n

\u0110\u1ec3 trung h\u00f2a 1 g ch\u1ea5t b\u00e9o \u0111\u00f3 c\u1ea7n 5,6 mg KOH<\/p>\n

\u0110\u1ec3 trung h\u00f2a 10 g ch\u1ea5t b\u00e9o c\u1ea7n 56 mg KOH<\/p>\n

=> nKOH<\/sub>\u00a0= (56:56).10-3 mol<\/p>\n

M\u00e0 ph\u1ea3n \u1ee9ng c\u1ee7a ch\u1ea5t b\u00e9o v\u1edbi KOH v\u00e0 NaOH c\u00f3 c\u00f9ng t\u1ec9 l\u1ec7 l\u00e0 s\u1ed1 mol KOH v\u00e0 NaOH ti\u00eau t\u1ed1n nh\u01b0 nhau => nNaOH<\/sub>\u00a0= nKOH<\/sub>\u00a0= 10 – 3 mol<\/p>\n

V\u1eady kh\u1ed1i l\u01b0\u1ee3ng NaOH c\u1ea7n d\u00f9ng \u0111\u1ec3 trung h\u00f2a 10 gam ch\u1ea5t b\u00e9o l\u00e0 :<\/p>\n

m = 10 – 3.40 = 0,04 (g)<\/p>\n

 <\/p>\n

<\/div>\n","protected":false},"excerpt":{"rendered":"

B\u00e0i 1 (trang 12 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0H\u00e3y ch\u1ecdn nh\u1eadn \u0111\u1ecbnh \u0111\u00fang : A. Lipit l\u00e0 ch\u1ea5t b\u00e9o B. Lipit l\u00e0 t\u00ean g\u1ecdi chung cho d\u1ea7u m\u1ee1 \u0111\u1ed9ng th\u1ef1c v\u1eadt C. Lipti l\u00e0 este c\u1ee7a glixerol v\u1edbi c\u00e1c axit b\u00e9o D. Lipit l\u00e0 nh\u1eefng h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 c\u00f3 trong t\u1ebf b\u00e0o s\u1ed1ng, kh\u00f4ng […]<\/p>\n","protected":false},"author":3,"featured_media":25530,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1306],"tags":[1436,1435],"yoast_head":"\nCh\u01b0\u01a1ng 1 - B\u00e0i 2: Lipit<\/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-1-bai-2-lipit-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 1 - B\u00e0i 2: Lipit\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 12 sgk H\u00f3a 12 n\u00e2ng cao):\u00a0H\u00e3y ch\u1ecdn nh\u1eadn \u0111\u1ecbnh \u0111\u00fang : A. 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