{"id":742,"date":"2021-10-07T23:23:26","date_gmt":"2021-10-07T23:23:26","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=742"},"modified":"2021-10-14T22:07:35","modified_gmt":"2021-10-14T15:07:35","slug":"cac-phuong-phap-nhan-biet-axit-bazo-muoi-hoa-8","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/cac-phuong-phap-nhan-biet-axit-bazo-muoi-hoa-8\/","title":{"rendered":"C\u00e1c ph\u01b0\u01a1ng ph\u00e1p nh\u1eadn bi\u1ebft Axit Baz\u01a1 mu\u1ed1i \u2013 H\u00f3a 8"},"content":{"rendered":"\n

Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n

B\u00e0i h\u1ecdc nh\u1eadn bi\u1ebft axit baz\u01a1 mu\u1ed1i l\u00e0 b\u00e0i h\u1ecdc c\u01a1 b\u1ea3n trong h\u00f3a h\u1ecdc l\u1edbp 8. C\u00f3 nhi\u1ec1u c\u00e1ch ph\u00e2n bi\u1ec7t kh\u00e1c nhau. Trong khu\u00f4n kh\u1ed5 b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd h\u01b0\u1edbng d\u1eabn cho b\u1ea1n c\u00e1ch ph\u00e2n bi\u1ec7t d\u1ec5 d\u00e0ng v\u00e0 ch\u00ednh x\u00e1c nh\u1ea5t nh\u00e9.<\/p>\n\n\n\n

L\u00fd thuy\u1ebft c\u01a1 b\u1ea3n v\u1ec1 axit baz\u01a1 mu\u1ed1i<\/p>\n\n\n\n

Tr\u01b0\u1edbc khi \u0111i v\u00e0o c\u00e1ch nh\u00e2\u0323n bi\u00ea\u0301t axit bazo mu\u1ed1i nh\u01b0 th\u1ebf n\u00e0o, ch\u00fang ta c\u00f9ng t\u00ecm hi\u1ec3u kh\u00e1i ni\u1ec7m oxit axit baz\u01a1 mu\u1ed1i \u0111\u00e3 nh\u00e9.<\/p>\n\n\n\n

Axit<\/p>\n\n\n\n

Tr\u01b0\u1edbc ti\u00ean ph\u1ea3i kh\u1eb3ng \u0111\u1ecbnh, axit l\u00e0 m\u1ed9t h\u1ee3p ch\u1ea5t h\u00f3a h\u1ecdc trong ph\u00e2n t\u1eed. N\u00f3 g\u1ed3m m\u1ed9t ho\u1eb7c nhi\u1ec1u nguy\u00ean t\u1eed Hidro li\u00ean k\u1ebft v\u1edbi g\u1ed1c axit. N\u00f3 c\u0169ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 m\u1ed9t h\u1ee3p ch\u1ea5t h\u00f3a h\u1ecdc m\u00e0 khi h\u00f2a tan trong n\u01b0\u1edbc t\u1ea1o ra m\u1ed9t dung d\u1ecbch c\u00f3 \u0111\u1ed9 pH nh\u1ecf h\u01a1n 7.<\/p>\n\n\n\n

Axit l\u00e0 m\u1ed9t h\u1ee3p ch\u1ea5t h\u00f3a h\u1ecdc c\u00f3 \u0111\u1ed9 pH b\u00e9 h\u01a1n 7<\/p>\n\n\n\n

\u0110\u0103ng ky\u0301 ho\u0323c th\u01b0\u0309 mi\u00ea\u0303n phi\u0301 m\u00f4n Ho\u0301a ho\u0323c t\u01b0\u0300 l\u01a1\u0301p 8 \u0111\u00ea\u0301n l\u01a1\u0301p 12<\/p><\/blockquote>\n\n\n\n

C\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a axit c\u00f3 d\u1ea1ng HxA, v\u1edbi x l\u00e0 ch\u1ec9 s\u1ed1 nguy\u00ean t\u1eed c\u1ee7a H c\u00f2n A l\u00e0 g\u1ed1c Axit V\u00ed d\u1ee5 nh\u01b0 ch\u00fang ta c\u00f3 c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a axit clohidric l\u00e0 HCl, c\u00f4ng th\u1ee9c c\u1ee7a axit photphoric l\u00e0 H3PO4 hay c\u1ee7a axit cacbonic l\u00e0 H2CO3.<\/p>\n\n\n\n

C\u00f3 nhi\u1ec1u c\u00e1ch chia axit kh\u00e1c nhau, c\u1ee5 th\u1ec3 l\u00e0 c\u00e1c c\u00e1ch chia sau:<\/p>\n\n\n\n

D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc, c\u00f3 th\u1ec3 chia th\u00e0nh axit m\u1ea1nh (t\u1ee9c l\u00e0 khi h\u00f2a tan v\u00e0o n\u01b0\u1edbc, \u0111\u1ed9 pH nh\u1ecf h\u01a1n 7, c\u00e0ng nh\u1ecf th\u00ec t\u00ednh axit c\u00e0ng m\u1ea1nh) v\u00e0 axit y\u1ebfu.<\/p>\n\n\n\n

D\u1ef1a v\u00e0o nguy\u00ean t\u1eed oxi c\u0169ng chia l\u00e0m 2 lo\u1ea1i, axit c\u00f3 oxi ( nh\u01b0 HBr, HI, HF, HCl, H2S\u2026) v\u00e0 axit c\u00f3 oxi (nh\u01b0 H3PO4, H2CO3, H2SO4, HNO3\u2026)<\/p>\n\n\n\n

Ho\u1eb7c c\u00f3 th\u1ec3 ph\u00e2n axit th\u00e0nh axit v\u00f4 c\u01a1 v\u00e0 axit h\u1eefu c\u01a1\u2026<\/p>\n\n\n\n

Nh\u01b0 v\u1eady, axit c\u00f3 th\u1ec3 ph\u00e2n th\u00e0nh nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau d\u1ef1a theo t\u1eebng ti\u00eau ch\u00ed kh\u00e1c nhau.<\/p>\n\n\n\n

Baz\u01a1<\/p>\n\n\n\n

B\u00ean c\u1ea1nh axit, ch\u00fang ta c\u00f9ng t\u00ecm hi\u1ec3u th\u00eam m\u1ed9t kh\u00e1i ni\u1ec7m n\u1eefa l\u00e0 baz\u01a1 xem n\u00f3 l\u00e0 g\u00ec v\u00e0 c\u00f3 c\u00f4ng th\u1ee9c ra sao, t\u00ednh ch\u1ea5t nh\u01b0 th\u1ebf n\u00e0o nh\u00e9. Co\u0301 nh\u01b0 v\u00e2\u0323y, vi\u00ea\u0323c nh\u1eadn bi\u1ebft axit baz\u01a1 mu\u1ed1i se\u0303 d\u00ea\u0303 da\u0300ng h\u01a1n.<\/p>\n\n\n\n

Baz\u01a1 c\u0169ng gi\u1ed1ng nh\u01b0 axit, l\u00e0 h\u1ee3p ch\u1ea5t h\u00f3a h\u1ecdc. Ph\u00e2n t\u1eed c\u1ee7a n\u00f3 bao g\u1ed3m m\u1ed9t nguy\u00ean t\u1eed kim lo\u1ea1i li\u00ean k\u1ebft v\u1edbi m\u1ed9t hay nhi\u1ec1u nh\u00f3m hidroxit (OH). H\u00f3a tr\u1ecb c\u1ee7a kim lo\u1ea1i s\u1ebd b\u1eb1ng s\u1ed1 h\u00f3a nh\u00f3m hidroxit. Kh\u00e1c v\u1edbi axit, khi h\u00f2a tan trong n\u01b0\u1edbc, baz\u01a1 s\u1ebd t\u1ea1o th\u00e0nh dung d\u1ecbch c\u00f3 \u0111\u1ed9 pH l\u1edbn h\u01a1n 7.<\/p>\n\n\n\n

C\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a baz\u01a1 ch\u00ednh l\u00e0 M(OH) n; trong \u0111\u00f3, M l\u00e0 kim lo\u1ea1i v\u00e0 n l\u00e0 h\u00f3a tr\u1ecb c\u1ee7a kim lo\u1ea1i \u0111\u00f3. L\u1ea5y v\u00ed d\u1ee5 c\u1ee5 th\u1ec3 nh\u01b0 sau: c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a baz\u01a1 S\u1eaft (III) hidroxit l\u00e0 H2CO3, c\u1ee7a Natri Hi\u0111roxit l\u00e0 NaOH v\u00e0 c\u1ee7a Kali Hidroxit l\u00e0 KOH.<\/p>\n\n\n\n

C\u0169ng gi\u1ed1ng nh\u01b0 axit, baz\u01a1 c\u0169ng \u0111\u01b0\u1ee3c chia ra nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, bao g\u1ed3m:<\/p>\n\n\n\n

D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc ch\u00fang ta c\u00f3 baz\u01a1 m\u1ea1nh v\u00e0 baz\u01a1 y\u1ebfu. Baz\u01a1 m\u1ea1nh c\u00f3 th\u1ec3 k\u1ec3 \u0111\u1ebfn nh\u01b0 NaOH hay KOH\u2026 Baz\u01a1 y\u1ebfu l\u00e0 e(OH)3 hay Al(OH)3\u2026<\/p>\n\n\n\n

D\u1ef1a v\u00e0o t\u00ednh tan trong n\u01b0\u1edbc, c\u0169ng chia baz\u01a1 th\u00e0nh 2 lo\u1ea1i l\u00e0 baz\u01a1 tan trong n\u01b0\u1edbc v\u00e0 baz\u01a1 kh\u00f4ng tan trong n\u01b0\u1edbc. Baz\u01a1 tan trong n\u01b0\u1edbc g\u1ecdi l\u00e0 ki\u1ec1m.<\/p>\n\n\n\n

Mu\u1ed1i<\/p>\n\n\n\n

Mu\u1ed1i c\u0169ng l\u00e0 m\u1ed9t h\u1ee3p ch\u1ea5t h\u00f3a h\u1ee3p, ph\u00e2n t\u1eed g\u1ed3m nguy\u00ean t\u1eed kim lo\u1ea1i li\u00ean k\u1ebft v\u1edbi g\u1ed1c axit. C\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a mu\u1ed1i ch\u00ednh l\u00e0 kim lo\u1ea1i + g\u1ed1c axit.<\/p>\n\n\n\n

Mu\u1ed1i g\u1ed3m nguy\u00ean t\u1eed kim lo\u1ea1i li\u00ean k\u1ebft v\u1edbi g\u1ed1c axit<\/p>\n\n\n\n

C\u0169ng gi\u1ed1ng nh\u01b0 axit v\u00e0 baz\u01a1, mu\u1ed1i c\u0169ng \u0111\u01b0\u1ee3c chia l\u00e0m 2 lo\u1ea1i nh\u01b0 sau:<\/p>\n\n\n\n

Mu\u1ed1i trung h\u00f2a: l\u00e0 mu\u1ed1i trong g\u1ed1c axit kh\u00f4ng c\u00f3 hidro. V\u00ed d\u1ee5 nh\u01b0 Na2CO3, Na2SO4\u2026<\/p>\n\n\n\n

Mu\u1ed1i axit: l\u00e0 mu\u1ed1i trong \u0111\u00f3 g\u1ed1c axit ch\u1ee9a nguy\u00ean t\u1eed hidro ch\u01b0a \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng kim lo\u1ea1i<\/p>\n\n\n\n

Nh\u01b0 v\u1eady ch\u00fang ta v\u1eeba \u0111i t\u00ecm hi\u1ec3u xong \u0111\u1ecbnh ngh\u0129a axit baz\u01a1 mu\u1ed1i. Nh\u1eefng th\u00f4ng tin n\u00e0y s\u1ebd gi\u00fap ch\u00fang ta nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c axit baz\u01a1 mu\u1ed1i h\u00f3a 8 nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n\n\n\n

Vietlearn \u2013 \u01af\u0301ng du\u0323ng da\u0323y ho\u0323c tr\u01b0\u0323c tuy\u00ea\u0301n ha\u0300ng \u0111\u00e2\u0300u Vi\u00ea\u0323t Nam<\/p>\n\n\n\n

C\u00e1c c\u00e1ch nh\u1eadn bi\u1ebft axit baz\u01a1 mu\u1ed1i<\/p>\n\n\n\n

Ch\u00fang t\u00f4i s\u1ebd ch\u1ec9 cho b\u1ea1n c\u00e1ch nh\u1eadn bi\u1ebft axit baz\u01a1 mu\u1ed1i b\u1eb1ng nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p sau:<\/p>\n\n\n\n

S\u1eed d\u1ee5ng qu\u1ef3 t\u00edm<\/p>\n\n\n\n

Qu\u1ef3 t\u00edm l\u00e0 m\u1ed9t v\u1eadt d\u1ee5ng c\u00f3 th\u1ec3 gi\u00fap nh\u1eadn bi\u1ebft 3 ch\u1ea5t axit baz\u01a1 mu\u1ed1i m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng.<\/p>\n\n\n\n

Qu\u1ef3 t\u00edm s\u1ebd chuy\u1ec3n sang m\u00e0u \u0111\u1ecf n\u1ebfu dung d\u1ecbch \u0111\u00f3 l\u00e0 axit; m\u00e0u xanh n\u1ebfu dung d\u1ecbch \u0111\u00f3 l\u00e0 baz\u01a1 v\u00e0 qu\u1ef3 t\u00edm kh\u00f4ng \u0111\u1ed5i m\u00e0u khi cho v\u00e0o dung d\u1ecbch mu\u1ed1i.<\/p>\n\n\n\n

Qu\u1ef3 t\u00edm \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 nh\u1eadn bi\u1ebft axit baz\u01a1 mu\u1ed1i<\/p>\n\n\n\n

Song c\u00f3 m\u1ed9t l\u01b0u \u00fd r\u1eb1ng \u1edf nh\u1eefng l\u1edbp cao h\u01a1n ho\u1eb7c thi h\u1ecdc sinh<\/a> gi\u1ecfi th\u00ec s\u1ebd c\u00f3 m\u1ed9t s\u1ed1 mu\u1ed1i khi\u1ebfn qu\u1ef3 t\u00edm \u0111\u1ed5i m\u00e0u nh\u01b0 NaHCO3, Na2CO3 (qu\u1ef3 t\u00edm chuy\u1ec3n xanh)<\/p>\n\n\n\n

Nh\u01b0 v\u1eady, n\u1ebfu m\u1eabu th\u1eed qu\u1ef3 t\u00edm chuy\u1ec3n m\u00e0u n\u00e0o th\u00ec b\u1ea1n c\u0169ng \u0111\u00e3 bi\u1ebft \u0111\u00f3 l\u00e0 dung d\u1ecbch ch\u1ee9a g\u00ec r\u1ed3i nh\u00e9. \u0110\u00e2y l\u00e0 c\u00e1ch d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n v\u00e0 nh\u1eadn bi\u1ebft nh\u1ea5t.<\/p>\n\n\n\n

B\u00e2\u0323t mi\u0301 ca\u0301ch \u0111a\u0301nh bay n\u00f4\u0303i s\u01a1\u0323 m\u00f4n Ho\u0301a ho\u0323c \u2013 Vietlearn<\/p><\/blockquote>\n\n\n\n

S\u1eed d\u1ee5ng h\u00f3a ch\u1ea5t kh\u00e1c<\/p>\n\n\n\n

B\u00ean c\u1ea1nh s\u1eed d\u1ee5ng qu\u1ef3 t\u00edm \u0111\u1ec3 nh\u1eadn bi\u1ebft axit baz\u01a1 mu\u1ed1i th\u00ec c\u00f2n m\u1ed9t c\u00e1ch kh\u00e1c n\u1eefa \u0111\u1ec3 nh\u1eadn bi\u1ebft. \u0110\u00f3 ch\u00ednh l\u00e0 s\u1eed d\u1ee5ng h\u00f3a ch\u1ea5t kh\u00e1c l\u00e0 mu\u1ed1i \u0111\u1ec3 xem c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc x\u1ea3y ra.<\/p>\n\n\n\n

V\u1edbi H2SO4 v\u00e0 dung d\u1ecbch mu\u1ed1i sunfat (SO4): ch\u00fang ta s\u1eed d\u1ee5ng dung d\u1ecbch mu\u1ed1i c\u1ee7a Bari ho\u1eb7c Ba(OH)2. Khi ti\u1ebfn h\u00e0nh th\u00ed nghi\u1ec7m, s\u1ebd th\u1ea5y c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng k\u1ebft t\u1ee7a tr\u1eafng, \u0111\u00f3 ch\u00ednh l\u00e0 BaSO4 kh\u00f4ng tan trong n\u01b0\u1edbc v\u00e0 axit.<\/p>\n\n\n\n

V\u1edbi HCl v\u00e0 mu\u1ed1i clorua (Cl): ch\u00fang ta s\u1eed d\u1ee5ng dung d\u1ecbch AgNO3 \u0111\u1ec3 th\u1eed. Ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc di\u1ec5n ra ch\u00ednh l\u00e0 xu\u1ea5t hi\u1ec7n k\u1ebft t\u1ee7a tr\u1eafng AgCl kh\u00f4ng tan trong n\u01b0\u1edbc v\u00e0 axit<\/p>\n\n\n\n

V\u1edbi mu\u1ed1i cacbonat (CO3), s\u1eed d\u1ee5ng dung d\u1ecbch axit (HCl, HNO3, H2SO4) s\u1ebd xu\u1ea5t hi\u1ec7n kh\u00ed kh\u00f4ng m\u00e0u kh\u00f4ng m\u00f9i.<\/p>\n\n\n\n

V\u1edbi mu\u1ed1i amoni (NH4): s\u1eed d\u1ee5ng dung d\u1ecbch ki\u1ec1m s\u1ebd xu\u1ea5t hi\u1ec7n kh\u00ed kh\u00f4ng m\u00e0u v\u00e0 c\u00ed m\u00f9i khai.<\/p>\n\n\n\n

Ngo\u00e0i ra c\u00f2n m\u1ed9t s\u1ed1 th\u00ed nghi\u1ec7m kh\u00e1c \u0111\u1ec3 c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c axit baz\u01a1 mu\u1ed1i trong dung d\u1ecbch.<\/p>\n\n\n\n

T\u00f3m l\u1ea1i, c\u00f3 nhi\u1ec1u c\u00e1ch kh\u00e1c nhau \u0111\u1ec3 nh\u1eadn bi\u1ebft axit baz\u01a1 mu\u1ed1i. B\u00ean c\u1ea1nh s\u1eed d\u1ee5ng qu\u1ef3 t\u00edm \u0111\u1ec3 th\u1eed, c\u00f2n m\u1ed9t s\u1ed1 c\u00e1ch s\u1eed d\u1ee5ng ch\u1ea5t th\u1eed \u0111\u1ec3 nh\u1eadn bi\u1ebft. Ch\u00fac c\u00e1c em gi\u1ea3i \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i t\u1eadp nh\u1eadn bi\u1ebft m\u1ed9t c\u00e1ch thu\u1ea7n th\u1ee5c nh\u00e9.<\/p>\n\n\n\n

Xem th\u00eam<\/p>\n\n\n\n

[B\u1ecf t\u00fai] B\u1ea3ng h\u00f3a tr\u1ecb c\u00e1c nguy\u00ean t\u1ed1 l\u1edbp 8 \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t \u2013 Vietlearn<\/p>\n\n\n\n

Ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc l\u00e0 g\u00ec? C\u00f3 m\u1ea5y lo\u1ea1i ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc \u2013<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"

Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn B\u00e0i h\u1ecdc nh\u1eadn bi\u1ebft axit baz\u01a1 mu\u1ed1i l\u00e0 b\u00e0i h\u1ecdc c\u01a1 b\u1ea3n trong h\u00f3a h\u1ecdc l\u1edbp 8. C\u00f3 nhi\u1ec1u c\u00e1ch ph\u00e2n bi\u1ec7t kh\u00e1c nhau. Trong khu\u00f4n kh\u1ed5 b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd h\u01b0\u1edbng d\u1eabn cho b\u1ea1n c\u00e1ch ph\u00e2n bi\u1ec7t d\u1ec5 d\u00e0ng v\u00e0 ch\u00ednh x\u00e1c nh\u1ea5t nh\u00e9. L\u00fd thuy\u1ebft […]<\/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],"tags":[],"class_list":["post-742","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/742","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=742"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/742\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=742"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}