A. Chu\u1ea9n B\u1ecb<\/h2>\n

1. D\u1ee5ng c\u1ee5 th\u00ed nghi\u1ec7m: \u1ed0ng nghi\u1ec7m, \u1ed1ng nh\u1ecf gi\u1ecdt, c\u1ed1c th\u1ee7y tinh 100ml, \u0111\u0169a th\u1ee7y tinh, \u0111\u00e8n c\u1ed3n, gi\u00e1 th\u00ed nghi\u1ec7m, gi\u00e1 \u0111\u1ec3 \u1ed1ng nghi\u1ec7m.<\/p>\n

2. H\u00f3a ch\u1ea5t: Andehit fomic, axit axetic \u0111\u1eb7c, H_{2<\/sub>SO4<\/sub>\u00a0\u0111\u1eb7c, dung d\u1ecbch AgNO3<\/sub>\u00a01%, dung d\u1ecbch NH3<\/sub>, dung d\u1ecbch Na2CO3<\/sub>\u00a0\u0111\u1eb7c, dung d\u1ecbch NaCl b\u00e3o h\u00f2a, gi\u1ea5y qu\u1ef3.<\/p>\n}

B. N\u1ed9i dung v\u00e0 c\u00e1ch ti\u1ebfn h\u00e0nh<\/h2>\n

Th\u00ed nghi\u1ec7m 1: Ph\u1ea3n \u1ee9ng tr\u00e1ng b\u1ea1c<\/b><\/p>\n

a) C\u00e1ch ti\u1ebfn h\u00e0nh: Cho 1ml dung d\u1ecbch AgNO_{3<\/sub>\u00a0v\u00e0o \u1ed1ng nghi\u1ec7m s\u1ea1ch, l\u1eafc nh\u1eb9 v\u00e0 nh\u1ecf t\u1eeb t\u1eeb t\u1eebng gi\u1ecdt dung d\u1ecbch NH3<\/sub>\u00a02M \u0111\u1ebfn khi k\u1ebft t\u1ee7a sinh ra b\u1ecb h\u00f2a tan h\u1ebft. Nh\u1ecf ti\u1ebfp 3-5 gi\u1ecdt dung d\u1ecbch andehit fomic, sau \u0111\u00f3 \u0111un n\u00f3ng nh\u1eb9 h\u1ed7n h\u1ee3p trong 2 ph\u00fat \u1edf kho\u1ea3ng 60-70^{o<\/sup>C<\/p>\n}}

b) Hi\u1ec7n t\u01b0\u1ee3ng: C\u00f3 1 l\u1edbp kim lo\u1ea1i m\u00e0u x\u00e1m b\u00e1m v\u00e0o \u1ed1ng nghi\u1ec7m, \u0111\u00f3 ch\u00ednh l\u00e0 Ag<\/p>\n

c) Gi\u1ea3i th\u00edch: Cation Ag^{+<\/sup>\u00a0t\u1ea1o ph\u1ee9c v\u1edbi NH_{3<\/sub>, ph\u1ee9c n\u00e0y tan trong n\u01b0\u1edbc, andehit kh\u1eed ion b\u1ea1c trong ph\u1ee9c \u0111\u00f3 t\u1ea1o th\u00e0nh kim lo\u1ea1i b\u1ea1c b\u00e1m v\u00e0o th\u00e0nh \u1ed1ng nghi\u1ec7m<\/p>\n}}

Ph\u01b0\u01a1ng tr\u00ecnh p\u01b0:<\/p>\n

HCHO + 2AgNO_{3<\/sub>\u00a0+ 3NH3<\/sub>\u00a0+ H2<\/sub>O \u2192 HCOONH4<\/sub>\u00a0+ 2Ag\u2193 + 2NH4<\/sub>NO3<\/sub><\/p>\n}

Th\u00ed nghi\u1ec7m 2: Ph\u1ea3n \u1ee9ng c\u1ee7a axit axetic v\u1edbi qu\u1ef3 t\u00edm, natri cacbonat<\/b><\/p>\n

a) T\u00e1c d\u1ee5ng c\u1ee7a axit axetic v\u1edbi gi\u1ea5y qu\u1ef3 t\u00edm:<\/p>\n

C\u00e1ch ti\u1ebfn h\u00e0nh: Nh\u00fang \u0111\u1ea7u th\u1ee7y tinh v\u00e0o dung d\u1ecbch axit axetic 10% sau \u0111\u00f3 ch\u1ea5m v\u00e0o m\u1eabu gi\u1ea5y qu\u1ef3 t\u00edm.<\/p>\n

Hi\u1ec7n t\u01b0\u1ee3ng: Gi\u1ea5y qu\u1ef3 h\u00f3a h\u1ed3ng do trong n\u01b0\u1edbc axit axetic ph\u00e2n li nh\u01b0 sau<\/p>\n

CH_{3<\/sub>COOH \u21cb CH3<\/sub>COO^{–<\/sup>\u00a0+ H+<\/sup><\/p>\n}}

b) Ph\u1ea3n \u1ee9ng c\u1ee7a axit axetic v\u1edbi Na2CO_{3<\/sub><\/p>\n}

C\u00e1ch ti\u1ebfn h\u00e0nh: R\u00f3t 1-2ml dung d\u1ecbch axit axetic \u0111\u1eadm \u0111\u1eb7c v\u00e0o \u1ed1ng nghi\u1ec7m \u0111\u1ef1ng 1-2ml dung d\u1ecbch Na_{2<\/sub>CO3<\/sub>\u00a0\u0111\u1eb7c. \u0110\u01b0a que di\u00eam \u0111ang ch\u00e1y v\u00e0o mi\u1ec7ng \u1ed1ng nghi\u1ec7m.<\/p>\n}

Hi\u1ec7n t\u01b0\u1ee3ng: \u1ed0ng nghi\u1ec7m s\u1ee7i b\u1ecdt kh\u00ed, que di\u00eam \u0111ang ch\u00e1y v\u1ee5t t\u1eaft. Do trong \u1ed1ng nghi\u1ec7m x\u1ea3y ra ph\u1ea3n \u1ee9ng sau:<\/p>\n

2CH_{3<\/sub>COOH + Na2<\/sub>CO3<\/sub>\u00a0\u2192 2CH3<\/sub>COONa + CO2<\/sub>\u2191 + H2<\/sub>O<\/p>\n","protected":false},"excerpt":{"rendered":"}

A. Chu\u1ea9n B\u1ecb 1. D\u1ee5ng c\u1ee5 th\u00ed nghi\u1ec7m: \u1ed0ng nghi\u1ec7m, \u1ed1ng nh\u1ecf gi\u1ecdt, c\u1ed1c th\u1ee7y tinh 100ml, \u0111\u0169a th\u1ee7y tinh, \u0111\u00e8n c\u1ed3n, gi\u00e1 th\u00ed nghi\u1ec7m, gi\u00e1 \u0111\u1ec3 \u1ed1ng nghi\u1ec7m. 2. H\u00f3a ch\u1ea5t: Andehit fomic, axit axetic \u0111\u1eb7c, H2SO4\u00a0\u0111\u1eb7c, dung d\u1ecbch AgNO3\u00a01%, dung d\u1ecbch NH3, dung d\u1ecbch Na2CO3\u00a0\u0111\u1eb7c, dung d\u1ecbch NaCl b\u00e3o h\u00f2a, gi\u1ea5y qu\u1ef3. B. […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1322],"tags":[1511,1510],"yoast_head":"\n