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[{"@context":"https:\/\/schema.org\/","@graph":[{"@context":"https:\/\/schema.org\/","@type":"SiteNavigationElement","@id":"https:\/\/luatduonggia.edu.vn#Ti\u1ebfng Vi\u1ec7t","name":"Home","url":"https:\/\/luatduonggia.edu.vn\/"},{"@context":"https:\/\/schema.org\/","@type":"SiteNavigationElement","@id":"https:\/\/luatduonggia.edu.vn#Ti\u1ebfng Vi\u1ec7t","name":"C\u00f4ng Ngh\u1ec7","url":"https:\/\/luatduonggia.edu.vn\/cong-nghe"},{"@context":"https:\/\/schema.org\/","@type":"SiteNavigationElement","@id":"https:\/\/luatduonggia.edu.vn#Ti\u1ebfng Vi\u1ec7t","name":"Gi\u00e1o D\u1ee5c","url":"https:\/\/luatduonggia.edu.vn\/giao-duc"},{"@context":"https:\/\/schema.org\/","@type":"SiteNavigationElement","@id":"https:\/\/luatduonggia.edu.vn#Ti\u1ebfng Vi\u1ec7t","name":"Phong Thu\u1ef7","url":"https:\/\/luatduonggia.edu.vn\/phong-thuy"},{"@context":"https:\/\/schema.org\/","@type":"SiteNavigationElement","@id":"https:\/\/luatduonggia.edu.vn#Ti\u1ebfng Vi\u1ec7t","name":"Th\u1ee7 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b\u1ea1n \u0111\u1ecdc tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi li\u00ean quan \u0111\u1ebfn n\u1ed3ng \u0111\u1ed9 pH, c\u0169ng nh\u01b0 thang pH \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u00e0 axit, bazo,..... T\u1eeb \u0111\u00f3 b\u1ea1n \u0111\u1ecdc v\u1eadn d\u1ee5ng gi\u1ea3i c\u00e1c b\u00e0i t\u1eadp c\u00e2u h\u1ecfi li\u00ean quan. M\u1eddi c\u00e1c b\u1ea1n c\u00f9ng theo d\u00f5i b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y nh\u00e9. \u0110\u1ed9 pH \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 m\u1ee9c \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ion H+ trong m\u00f4i tr\u01b0\u1eddng dung di\u0323ch d\u01b0\u1edbi s\u1ef1 t\u00e1c \u0111\u1ed9ng b\u1edfi 1 h\u1eb1ng s\u1ed1 \u0111i\u1ec7n ly. T\u1ea5t c\u1ea3 c\u00e1c dung d\u1ecbch t\u1ed3n t\u1ea1i \u1edf d\u1ea1ng l\u1ecfng \u0111\u1ec1u c\u00f3 1 \u0111\u1ed9 pH ri\u00eang v\u00e0 pH \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u1ecfng \u0111\u00f3 c\u00f3 l\u1ee3i hay c\u00f3 h\u1ea1i. pH \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 logarit \u00e2m c\u1ee7a n\u1ed3ng \u0111\u1ed9 ion hydro ch\u1ea1y t\u1eeb 0 \u0111\u1ebfn 14. N\u00f3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng to\u00e1n h\u1ecdc nh\u01b0 sau : C\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9 pH: pH -log Trong ph\u00f2ng th\u00ed nghi\u1ec7m ho\u1eb7c trong c\u00e1c nghi\u00ean c\u1ee9u h\u1ea7u nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c qu\u00e1 tr\u00ecnh c\u00f3 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a n\u01b0\u1edbc \u0111\u1ec1u c\u1ea7n \u0111o pH. Vi\u1ec7c n\u00e0y bao g\u1ed3m chu\u1ea9n \u0111o\u00e1n h\u00f3a h\u1ecdc, ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc khoa h\u1ecdc m\u00f4i tr\u01b0\u1eddng v\u00e0 c\u00e1c th\u00ed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng sinh h\u1ecdc. T\u1ea5t c\u1ea3 c\u00e1c sinh v\u1eadt s\u1ed1ng \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ee9c \u0111\u1ed9 pH th\u00edch h\u1ee3p \u0111\u1ec3 duy tr\u00ec s\u1ef1 s\u1ed1ng. T\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi v\u00e0 \u0111\u1ed9ng v\u1eadt \u0111\u1ec1u d\u1ef1a v\u00e0o c\u01a1 ch\u1ebf n\u1ed9i b\u1ed9 \u0111\u1ec3 duy tr\u00ec 1 n\u1ed3ng \u0111\u1ed9 pH nh\u1ea5t \u0111\u1ecbnh. \u0110\u00e1p \u00e1n h\u01b0\u1edbng d\u1eabn gi\u1ea3i chi ti\u1ebft NaCl t\u1ea1o b\u1edfi bazo m\u1ea1nh (NaOH) v\u00e0 axit m\u1ea1nh (HCl) > m\u00f4i tr\u01b0\u1eddng trung t\u00ednh (pH 7) Na2CO3 t\u1ea1o b\u1edfi bazo m\u1ea1nh (NaOH) v\u00e0 axit y\u1ebfu (H2CO3) > m\u00f4i tr\u01b0\u1eddng ki\u1ec1m (pH > 7) NaOH l\u00e0 bazo m\u1ea1nh Ba(OH)2 > m\u00f4i tr\u01b0\u1eddng bazo (pH > 7) HCl l\u00e0 axit m\u1ea1nh > M\u00f4i tr\u01b0\u1eddng axit (pH < 7) \u0110\u00e1p \u00e1n B C\u00e2u h\u1ecfi b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng li\u00ean quan C\u00e2u 1. Cho d\u00e3y c\u00e1c ch\u1ea5t sau: K2O, P2O5, Na2O, Fe3O4, ZnO, MgO, CuO, Al2O3, BaO, FeO. Trong c\u00e1c ch\u1ea5t tr\u00ean. S\u1ed1 ch\u1ea5t tan \u0111\u01b0\u1ee3c trong n\u01b0\u1edbc t\u1ea1o ra dung d\u1ecbch c\u00f3 pH > 7 l\u00e0: A. 4 B. 5 C. 3 D. 6 C\u00e2u 2. Dung d\u1ecbch mu\u1ed1i n\u00e0o sau \u0111\u00e2y c\u00f3 pH > 7 A. KCl. B. Na2CO3. C. Ba(NO3)2. D. NH4Cl. C\u00e2u 3. Cho ba dung d\u1ecbch NH3, KOH, Ca(OH)2 c\u00f3 c\u00f9ng gi\u00e1 tr\u1ecb pH. C\u00e1c dung d\u1ecbch \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo th\u1ee9 t\u1ef1 n\u1ed3ng \u0111\u1ed9 mol t\u0103ng d\u1ea7n l\u00e0: A. NH3, KOH, Ca(OH)2 B. NH3, Ca(OH)2, KOH C. KOH, NH3, Ca(OH)2 D. Ca(OH)2, KOH, NH3 C\u00e2u 4. Ch\u1ecdn ph\u00e1t bi\u1ec3u \u0111\u00fang v\u1ec1 gi\u00e1 tr\u1ecb pH? A. Gi\u00e1 tr\u1ecb pH t\u0103ng th\u00ec \u0111\u1ed9 axit gi\u1ea3m. B. Gi\u00e1 tr\u1ecb pH t\u0103ng th\u00ec \u0111\u1ed9 axit t\u0103ng. C. Dung d\u1ecbch c\u00f3 pH < 7 l\u00e0m qu\u1ef3 t\u00edm ho\u00e1 xanh. D. Dung d\u1ecbch c\u00f3 pH >7 l\u00e0m qu\u1ef3 t\u00edm ho\u00e1 \u0111\u1ecf. C\u00e2u 5. Ch\u1ea5t n\u00e0o sau \u0111\u00e2y khi cho v\u00e0o n\u01b0\u1edbc kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111\u1ed9 pH c\u1ee7a dung d\u1ecbch? A. K2CO3. B. Na2SO4. C. HCl. D. NH4Cl. C\u00e2u 6. D\u00e3y s\u1eafp x\u1ebfp c\u00e1c dung d\u1ecbch lo\u00e3ng c\u00f3 n\u1ed3ng \u0111\u1ed9 mol\/l nh\u01b0 nhau theo th\u1ee9 t\u1ef1 pH t\u0103ng d\u1ea7n l\u00e0 A. KHSO4, HF, H2SO4, Na2CO3. B. HF, H2SO4, Na2CO3, KHSO4. C. H2SO4, KHSO4, HF, Na2CO3. D. HF, KHSO4, H2SO4, Na2CO3. C\u00e2u 7. Dung d\u1ecbch c\u00f3 pH > 7 l\u00e0 A. FeCl2. B. Na2SO4. C. K2CO3. D. Al2(SO4)3. C\u00e2u 8. Cho c\u00e1c ch\u1ea5t sau: KOH, HCl, NH3, KCl, KHSO4, C2H5OH. S\u1ed1 ch\u1ea5t dung d\u1ecbch c\u00f3 pH > 7 l\u00e0: A. 2 B. 3 C. 5 D. 4 C\u00e2u 9. Dung d\u1ecbch c\u00f3 gi\u00e1 tr\u1ecb pH > 7 s\u1ebd l\u00e0m qu\u1ef3 t\u00edm A. chuy\u1ec3n sang m\u00e0u \u0111\u1ecf. B. chuy\u1ec3n sang m\u00e0u xanh. C. qu\u1ef3 kh\u00f4ng \u0111\u1ed5i m\u00e0u. D. kh\u00f4ng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c. C\u00e2u 10. Dung d\u1ecbch c\u00f3 pH < 7 l\u00e0 A. CaCl2. B. K2SO3. C. Na2CO3. D. CuSO4 . C\u00e2u 11. Dung d\u1ecbch c\u00f3 pH >7, t\u00e1c d\u1ee5ng \u0111\u01b0\u1ee3c v\u1edbi dung d\u1ecbch Na2SO4 t\u1ea1o k\u1ebft t\u1ee7a l\u00e0: A. KOH B. H2SO4 C. Ba(OH)2 D. BaCl2 C\u00e2u 12. Cho c\u00e1c dung d\u1ecbch sau: KHSO4, AlCl3, Na2SO4, Na2S, Ca(NO3)2. S\u1ed1 dung d\u1ecbch c\u00f3 pH < 7 l\u00e0 A. 1. B. 2. C. 3. D. 4 C\u00e2u 13. N\u1ed9i dung nh\u1eadn \u0111\u1ecbnh n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0 ch\u00ednh x\u00e1c A. M\u00f4i tr\u01b0\u1eddng ki\u1ec1m c\u00f3 pH < 7. B. M\u00f4i tr\u01b0\u1eddng ki\u1ec1m c\u00f3 pH > 7. C. M\u00f4i tr\u01b0\u1eddng trung t\u00ednh c\u00f3 pH 7. D. M\u00f4i tr\u01b0\u1eddng axit c\u00f3 pH < 7. C\u00e2u 14. C\u00e1c nh\u00f3m kim lo\u1ea1i n\u00e0o sau \u0111\u00e2y ph\u1ea3n \u1ee9ng v\u1edbi HCl sinh ra kh\u00ed H2? A. Fe, Ag, NaK, Ag, Al, Ca B. Cu, Fe, Zn, Al, Mg, Na C. Mg, K, Fe, Al, Na D. Zn, Cu, K, Mg, Ag, Al, Ca C\u00e2u 15. Cho h\u1ed7n h\u1ee3p b\u1ed9t g\u1ed3m c\u00e1c kim lo\u1ea1i sau: Al, Fe, Mg v\u00e0 Ag v\u00e0o dung d\u1ecbch H2SO4 d\u01b0, sau ph\u1ea3n \u1ee9ng thu \u0111\u01b0\u1ee3c ch\u1ea5t r\u1eafn T kh\u00f4ng tan. V\u1eady T l\u00e0: A. Al. B. Fe. C. Mg. D. Ag C\u00e2u 16. \u0110\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c ch\u1ea5t \u0111\u1ef1ng trong l\u1ecd ri\u00eang bi\u1ec7t sau: KNO3, Cu(NO3)2, Fe(NO3)3, Ba(NO3)2 ng\u01b0\u1eddi ta c\u1ea7n s\u1eed d\u1ee5ng h\u00f3a ch\u1ea5t n\u00e0o? A. KOH, H2SO4 B. KCl, HCl C. Ca(OH)2 D. BaCl2 C\u00e2u 17. Cho kh\u00ed H2S l\u1ed9i qua dung d\u1ecbch CuSO4 th\u1ea5y c\u00f3 k\u1ebft t\u1ee7a m\u00e0u x\u00e1m \u0111en xu\u1ea5t hi\u1ec7n, ch\u1ee9ng t\u1ecf: A. C\u00f3 ph\u1ea3n \u1ee9ng oxi ho\u00e1 - kh\u1eed x\u1ea3y ra. B. C\u00f3 k\u1ebft t\u1ee7a CuS t\u1ea1o th\u00e0nh, kh\u00f4ng tan trong axit m\u1ea1nh. C. Axit sunfuhi\u0111ric m\u1ea1nh h\u01a1n axit sunfuric. D. Axit sunfuric m\u1ea1nh h\u01a1n axit sunfuhi\u0111ric. C\u00e2u 18. Tr\u01b0\u1eddng h\u1ee3p n\u00e0o sau \u0111\u00e2y kh\u00f4ng x\u1ea3y ra ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc? A. 3O2 + 2H2S \u2192 2SO2 + 2H2O (to) B. FeCl2 + H2S \u2192 2HCl + FeS C. O3 + 2KI + H2O \u2192 2KOH + O2 + I2 D. Cl2 + 2NaOH \u2192 NaCl + NaClO + H2O C\u00e2u 19. Cho m\u1ea9u qu\u1ef3 t\u00edm v\u00e0o \u1ed1ng nghi\u1ec7m ch\u1ee9a dung d\u1ecbch NaOH, sau \u0111\u00f3 ti\u1ebfp t\u1ee5c nh\u1ecf t\u1eeb t\u1eeb \u0111\u1ebfn d\u01b0 dung d\u1ecbch H2SO4 v\u00e0o \u1ed1ng nghi\u1ec7m. K\u1ebft th\u00fac ph\u1ea3n \u1ee9ng qu\u1ef3 t\u00edm chuy\u1ec3n sang m\u00e0u g\u00ec A. Qu\u1ef3 t\u00edm chuy\u1ec3n sang m\u00e0u \u0111\u1ecf B. Qu\u1ef3 t\u00edm chuy\u1ec3n sang m\u00e0u xanh C. Qu\u1ef3 t\u00edm kh\u00f4ng \u0111\u1ed5i m\u00e0u D. Qu\u1ef3 t\u00edm \u0111\u1ed5i s\u00e1ng m\u00e0u v\u00e0ng C\u00e2u 20. Nh\u1ecf m\u1ed9t gi\u1ecdt qu\u1ef3 t\u00edm v\u00e0o dung d\u1ecbch NaOH, dung d\u1ecbch c\u00f3 m\u00e0u xanh, nh\u1ecf t\u1eeb t\u1eeb dung d\u1ecbch HCl cho t\u1edbi d\u01b0 v\u00e0o dung d\u1ecbch c\u00f3 m\u00e0u xanh tr\u00ean th\u00ec: A. M\u00e0u xanh v\u1eabn kh\u00f4ng thay \u0111\u1ed5i. B. M\u00e0u xanh nh\u1ea1t d\u1ea7n r\u1ed3i m\u1ea5t h\u1eb3n C. M\u00e0u xanh nh\u1ea1t d\u1ea7n, m\u1ea5t h\u1eb3n r\u1ed3i chuy\u1ec3n sang m\u00e0u \u0111\u1ecf D. M\u00e0u xanh \u0111\u1eadm th\u00eam d\u1ea7n ......................................... Tr\u00ean \u0111\u00e2y VnDoc.com v\u1eeba gi\u1edbi thi\u1ec7u t\u1edbi c\u00e1c b\u1ea1n b\u00e0i vi\u1ebft Dung d\u1ecbch n\u00e0o sau \u0111\u00e2y c\u00f3 pH < 7, b\u00e0i vi\u1ebft \u0111\u00e3 cho c\u00e1c b\u1ea1n th\u1ea5y nh\u1eefng dung d\u1ecbch c\u00f3 \u0111\u1ed9 pH nh\u1ecf h\u01a1n 7. Mong r\u1eb1ng qua b\u00e0i vi\u1ebft n\u00e0y c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 h\u1ecdc t\u1eadp t\u1ed1t h\u01a1n m\u00f4n H\u00f3a h\u1ecdc l\u1edbp 11. M\u1eddi c\u00e1c b\u1ea1n c\u00f9ng tham kh\u1ea3o th\u00eam ki\u1ebfn th\u1ee9c c\u00e1c m\u1ee5c Tr\u1eafc nghi\u1ec7m H\u00f3a h\u1ecdc 11... >> M\u1eddi c\u00e1c b\u1ea1n tham kh\u1ea3o th\u00eam t\u00e0i li\u1ec7u li\u00ean quan Dung d\u1ecbch ch\u1ea5t n\u00e0o sau \u0111\u00e2y c\u00f3 pH b\u00e9 h\u01a1n 7 C\u00e2u n\u00e0o sai khi n\u00f3i v\u1ec1 pH v\u00e0 pOH c\u1ee7a dung d\u1ecbch Dung d\u1ecbch ch\u1ea5t n\u00e0o sau \u0111\u00e2y c\u00f3 pH l\u1edbn nh\u1ea5t Dung d\u1ecbch n\u00e0o sau \u0111\u00e2y c\u00f3 gi\u00e1 tr\u1ecb pH l\u1edbn h\u01a1n 7 Dung d\u1ecbch mu\u1ed1i n\u00e0o sau \u0111\u00e2y c\u00f3 pH 7 Dung d\u1ecbch n\u00e0o sau \u0111\u00e2y c\u00f3 pH >7 pH l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh pH","name":"Dung d\u1ecbch nào sau \u0111ây có pH < 7 - Blog Lu\u1eadt \u0110\u01b0\u1eddng Gia","uploadDate":"2024-02-19T07:13:44+07:00","thumbnailUrl":"","author":{"@type":"Person","name":"Lu\u1eadt \u0110\u01b0\u1eddng Gia","url":"https:\/\/luatduonggia.edu.vn\/author\/bachkhoadanang","sameAs":["https:\/\/luatduonggia.edu.vn"],"image":{"@type":"ImageObject","url":"https:\/\/secure.gravatar.com\/avatar\/cb3f00cee5aab0735d6aa9b692c9d819?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"suckhoegioitinh","url":"https:\/\/luatduonggia.edu.vn\/","logo":{"@type":"ImageObject","url":"https:\/\/luatduonggia.edu.vn\/wp-content\/uploads\/2023\/09\/cropped-mamnondothiviethung-1.png","width":"540","height":"180"}},"image":{"@type":"ImageObject","@id":"https:\/\/luatduonggia.edu.vn\/dung-dich-ph-7-co-moi-truong#primaryimage","url":"https:\/\/luatduonggia.edu.vn\/wp-content\/plugins\/accelerated-mobile-pages\/images\/SD-default-image.png","width":"1280","height":"720"}}, {"@context":"https:\/\/schema.org\/","@type":"NewsArticle","@id":"https:\/\/luatduonggia.edu.vn\/dung-dich-ph-7-co-moi-truong#newsarticle","url":"https:\/\/luatduonggia.edu.vn\/dung-dich-ph-7-co-moi-truong","headline":"Dung d\u1ecbch nào sau \u0111ây có pH < 7 - Blog Lu\u1eadt \u0110\u01b0\u1eddng Gia","mainEntityOfPage":"https:\/\/luatduonggia.edu.vn\/dung-dich-ph-7-co-moi-truong","datePublished":"2024-02-19T07:13:44+07:00","dateModified":"2024-02-19T07:13:47+07:00","description":"Dung d\u1ecbch n\u00e0o sau \u0111\u00e2y c\u00f3 pH < 7 \u0111\u01b0\u1ee3c VnDoc bi\u00ean so\u1ea1n h\u01b0\u1edbng d\u1eabn b\u1ea1n \u0111\u1ecdc tr\u1ea3 l\u1eddi c\u00e2u","articleSection":"T\u1ed5ng h\u1ee3p","articleBody":"Dung d\u1ecbch n\u00e0o sau \u0111\u00e2y c\u00f3 pH < 7 \u0111\u01b0\u1ee3c VnDoc bi\u00ean so\u1ea1n h\u01b0\u1edbng d\u1eabn b\u1ea1n \u0111\u1ecdc tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi li\u00ean quan \u0111\u1ebfn n\u1ed3ng \u0111\u1ed9 pH, c\u0169ng nh\u01b0 thang pH \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u00e0 axit, bazo,..... T\u1eeb \u0111\u00f3 b\u1ea1n \u0111\u1ecdc v\u1eadn d\u1ee5ng gi\u1ea3i c\u00e1c b\u00e0i t\u1eadp c\u00e2u h\u1ecfi li\u00ean quan. M\u1eddi c\u00e1c b\u1ea1n c\u00f9ng theo d\u00f5i b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y nh\u00e9. \u0110\u1ed9 pH \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 m\u1ee9c \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ion H+ trong m\u00f4i tr\u01b0\u1eddng dung di\u0323ch d\u01b0\u1edbi s\u1ef1 t\u00e1c \u0111\u1ed9ng b\u1edfi 1 h\u1eb1ng s\u1ed1 \u0111i\u1ec7n ly. T\u1ea5t c\u1ea3 c\u00e1c dung d\u1ecbch t\u1ed3n t\u1ea1i \u1edf d\u1ea1ng l\u1ecfng \u0111\u1ec1u c\u00f3 1 \u0111\u1ed9 pH ri\u00eang v\u00e0 pH \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u1ecfng \u0111\u00f3 c\u00f3 l\u1ee3i hay c\u00f3 h\u1ea1i. pH \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 logarit \u00e2m c\u1ee7a n\u1ed3ng \u0111\u1ed9 ion hydro ch\u1ea1y t\u1eeb 0 \u0111\u1ebfn 14. N\u00f3 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng to\u00e1n h\u1ecdc nh\u01b0 sau : C\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9 pH: pH -log Trong ph\u00f2ng th\u00ed nghi\u1ec7m ho\u1eb7c trong c\u00e1c nghi\u00ean c\u1ee9u h\u1ea7u nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c qu\u00e1 tr\u00ecnh c\u00f3 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a n\u01b0\u1edbc \u0111\u1ec1u c\u1ea7n \u0111o pH. Vi\u1ec7c n\u00e0y bao g\u1ed3m chu\u1ea9n \u0111o\u00e1n h\u00f3a h\u1ecdc, ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc khoa h\u1ecdc m\u00f4i tr\u01b0\u1eddng v\u00e0 c\u00e1c th\u00ed nghi\u1ec7m m\u00f4i tr\u01b0\u1eddng sinh h\u1ecdc. T\u1ea5t c\u1ea3 c\u00e1c sinh v\u1eadt s\u1ed1ng \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ee9c \u0111\u1ed9 pH th\u00edch h\u1ee3p \u0111\u1ec3 duy tr\u00ec s\u1ef1 s\u1ed1ng. T\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi v\u00e0 \u0111\u1ed9ng v\u1eadt \u0111\u1ec1u d\u1ef1a v\u00e0o c\u01a1 ch\u1ebf n\u1ed9i b\u1ed9 \u0111\u1ec3 duy tr\u00ec 1 n\u1ed3ng \u0111\u1ed9 pH nh\u1ea5t \u0111\u1ecbnh. \u0110\u00e1p \u00e1n h\u01b0\u1edbng d\u1eabn gi\u1ea3i chi ti\u1ebft NaCl t\u1ea1o b\u1edfi bazo m\u1ea1nh (NaOH) v\u00e0 axit m\u1ea1nh (HCl) > m\u00f4i tr\u01b0\u1eddng trung t\u00ednh (pH 7) Na2CO3 t\u1ea1o b\u1edfi bazo m\u1ea1nh (NaOH) v\u00e0 axit y\u1ebfu (H2CO3) > m\u00f4i tr\u01b0\u1eddng ki\u1ec1m (pH > 7) NaOH l\u00e0 bazo m\u1ea1nh Ba(OH)2 > m\u00f4i tr\u01b0\u1eddng bazo (pH > 7) HCl l\u00e0 axit m\u1ea1nh > M\u00f4i tr\u01b0\u1eddng axit (pH < 7) \u0110\u00e1p \u00e1n B C\u00e2u h\u1ecfi b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng li\u00ean quan C\u00e2u 1. Cho d\u00e3y c\u00e1c ch\u1ea5t sau: K2O, P2O5, Na2O, Fe3O4, ZnO, MgO, CuO, Al2O3, BaO, FeO. Trong c\u00e1c ch\u1ea5t tr\u00ean. S\u1ed1 ch\u1ea5t tan \u0111\u01b0\u1ee3c trong n\u01b0\u1edbc t\u1ea1o ra dung d\u1ecbch c\u00f3 pH > 7 l\u00e0: A. 4 B. 5 C. 3 D. 6 C\u00e2u 2. Dung d\u1ecbch mu\u1ed1i n\u00e0o sau \u0111\u00e2y c\u00f3 pH > 7 A. KCl. B. Na2CO3. C. Ba(NO3)2. D. NH4Cl. C\u00e2u 3. Cho ba dung d\u1ecbch NH3, KOH, Ca(OH)2 c\u00f3 c\u00f9ng gi\u00e1 tr\u1ecb pH. C\u00e1c dung d\u1ecbch \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo th\u1ee9 t\u1ef1 n\u1ed3ng \u0111\u1ed9 mol t\u0103ng d\u1ea7n l\u00e0: A. NH3, KOH, Ca(OH)2 B. NH3, Ca(OH)2, KOH C. KOH, NH3, Ca(OH)2 D. Ca(OH)2, KOH, NH3 C\u00e2u 4. Ch\u1ecdn ph\u00e1t bi\u1ec3u \u0111\u00fang v\u1ec1 gi\u00e1 tr\u1ecb pH? A. Gi\u00e1 tr\u1ecb pH t\u0103ng th\u00ec \u0111\u1ed9 axit gi\u1ea3m. B. Gi\u00e1 tr\u1ecb pH t\u0103ng th\u00ec \u0111\u1ed9 axit t\u0103ng. C. Dung d\u1ecbch c\u00f3 pH < 7 l\u00e0m qu\u1ef3 t\u00edm ho\u00e1 xanh. D. Dung d\u1ecbch c\u00f3 pH >7 l\u00e0m qu\u1ef3 t\u00edm ho\u00e1 \u0111\u1ecf. C\u00e2u 5. Ch\u1ea5t n\u00e0o sau \u0111\u00e2y khi cho v\u00e0o n\u01b0\u1edbc kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111\u1ed9 pH c\u1ee7a dung d\u1ecbch? A. K2CO3. B. Na2SO4. C. HCl. D. NH4Cl. C\u00e2u 6. D\u00e3y s\u1eafp x\u1ebfp c\u00e1c dung d\u1ecbch lo\u00e3ng c\u00f3 n\u1ed3ng \u0111\u1ed9 mol\/l nh\u01b0 nhau theo th\u1ee9 t\u1ef1 pH t\u0103ng d\u1ea7n l\u00e0 A. KHSO4, HF, H2SO4, Na2CO3. B. HF, H2SO4, Na2CO3, KHSO4. C. H2SO4, KHSO4, HF, Na2CO3. D. HF, KHSO4, H2SO4, Na2CO3. C\u00e2u 7. Dung d\u1ecbch c\u00f3 pH > 7 l\u00e0 A. FeCl2. B. Na2SO4. C. K2CO3. D. Al2(SO4)3. C\u00e2u 8. Cho c\u00e1c ch\u1ea5t sau: KOH, HCl, NH3, KCl, KHSO4, C2H5OH. S\u1ed1 ch\u1ea5t dung d\u1ecbch c\u00f3 pH > 7 l\u00e0: A. 2 B. 3 C. 5 D. 4 C\u00e2u 9. Dung d\u1ecbch c\u00f3 gi\u00e1 tr\u1ecb pH > 7 s\u1ebd l\u00e0m qu\u1ef3 t\u00edm A. chuy\u1ec3n sang m\u00e0u \u0111\u1ecf. B. chuy\u1ec3n sang m\u00e0u xanh. C. qu\u1ef3 kh\u00f4ng \u0111\u1ed5i m\u00e0u. D. kh\u00f4ng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c. C\u00e2u 10. Dung d\u1ecbch c\u00f3 pH < 7 l\u00e0 A. CaCl2. B. K2SO3. C. Na2CO3. D. CuSO4 . C\u00e2u 11. Dung d\u1ecbch c\u00f3 pH >7, t\u00e1c d\u1ee5ng \u0111\u01b0\u1ee3c v\u1edbi dung d\u1ecbch Na2SO4 t\u1ea1o k\u1ebft t\u1ee7a l\u00e0: A. KOH B. H2SO4 C. Ba(OH)2 D. BaCl2 C\u00e2u 12. Cho c\u00e1c dung d\u1ecbch sau: KHSO4, AlCl3, Na2SO4, Na2S, Ca(NO3)2. S\u1ed1 dung d\u1ecbch c\u00f3 pH < 7 l\u00e0 A. 1. B. 2. C. 3. D. 4 C\u00e2u 13. N\u1ed9i dung nh\u1eadn \u0111\u1ecbnh n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0 ch\u00ednh x\u00e1c A. M\u00f4i tr\u01b0\u1eddng ki\u1ec1m c\u00f3 pH < 7. B. M\u00f4i tr\u01b0\u1eddng ki\u1ec1m c\u00f3 pH > 7. C. M\u00f4i tr\u01b0\u1eddng trung t\u00ednh c\u00f3 pH 7. D. M\u00f4i tr\u01b0\u1eddng axit c\u00f3 pH < 7. C\u00e2u 14. C\u00e1c nh\u00f3m kim lo\u1ea1i n\u00e0o sau \u0111\u00e2y ph\u1ea3n \u1ee9ng v\u1edbi HCl sinh ra kh\u00ed H2? A. Fe, Ag, NaK, Ag, Al, Ca B. Cu, Fe, Zn, Al, Mg, Na C. Mg, K, Fe, Al, Na D. Zn, Cu, K, Mg, Ag, Al, Ca C\u00e2u 15. Cho h\u1ed7n h\u1ee3p b\u1ed9t g\u1ed3m c\u00e1c kim lo\u1ea1i sau: Al, Fe, Mg v\u00e0 Ag v\u00e0o dung d\u1ecbch H2SO4 d\u01b0, sau ph\u1ea3n \u1ee9ng thu \u0111\u01b0\u1ee3c ch\u1ea5t r\u1eafn T kh\u00f4ng tan. V\u1eady T l\u00e0: A. Al. B. Fe. C. Mg. D. Ag C\u00e2u 16. \u0110\u1ec3 ph\u00e2n bi\u1ec7t c\u00e1c ch\u1ea5t \u0111\u1ef1ng trong l\u1ecd ri\u00eang bi\u1ec7t sau: KNO3, Cu(NO3)2, Fe(NO3)3, Ba(NO3)2 ng\u01b0\u1eddi ta c\u1ea7n s\u1eed d\u1ee5ng h\u00f3a ch\u1ea5t n\u00e0o? A. KOH, H2SO4 B. KCl, HCl C. Ca(OH)2 D. BaCl2 C\u00e2u 17. Cho kh\u00ed H2S l\u1ed9i qua dung d\u1ecbch CuSO4 th\u1ea5y c\u00f3 k\u1ebft t\u1ee7a m\u00e0u x\u00e1m \u0111en xu\u1ea5t hi\u1ec7n, ch\u1ee9ng t\u1ecf: A. C\u00f3 ph\u1ea3n \u1ee9ng oxi ho\u00e1 - kh\u1eed x\u1ea3y ra. B. C\u00f3 k\u1ebft t\u1ee7a CuS t\u1ea1o th\u00e0nh, kh\u00f4ng tan trong axit m\u1ea1nh. C. Axit sunfuhi\u0111ric m\u1ea1nh h\u01a1n axit sunfuric. D. Axit sunfuric m\u1ea1nh h\u01a1n axit sunfuhi\u0111ric. C\u00e2u 18. Tr\u01b0\u1eddng h\u1ee3p n\u00e0o sau \u0111\u00e2y kh\u00f4ng x\u1ea3y ra ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc? A. 3O2 + 2H2S \u2192 2SO2 + 2H2O (to) B. FeCl2 + H2S \u2192 2HCl + FeS C. O3 + 2KI + H2O \u2192 2KOH + O2 + I2 D. Cl2 + 2NaOH \u2192 NaCl + NaClO + H2O C\u00e2u 19. Cho m\u1ea9u qu\u1ef3 t\u00edm v\u00e0o \u1ed1ng nghi\u1ec7m ch\u1ee9a dung d\u1ecbch NaOH, sau \u0111\u00f3 ti\u1ebfp t\u1ee5c nh\u1ecf t\u1eeb t\u1eeb \u0111\u1ebfn d\u01b0 dung d\u1ecbch H2SO4 v\u00e0o \u1ed1ng nghi\u1ec7m. K\u1ebft th\u00fac ph\u1ea3n \u1ee9ng qu\u1ef3 t\u00edm chuy\u1ec3n sang m\u00e0u g\u00ec A. Qu\u1ef3 t\u00edm chuy\u1ec3n sang m\u00e0u \u0111\u1ecf B. Qu\u1ef3 t\u00edm chuy\u1ec3n sang m\u00e0u xanh C. Qu\u1ef3 t\u00edm kh\u00f4ng \u0111\u1ed5i m\u00e0u D. Qu\u1ef3 t\u00edm \u0111\u1ed5i s\u00e1ng m\u00e0u v\u00e0ng C\u00e2u 20. Nh\u1ecf m\u1ed9t gi\u1ecdt qu\u1ef3 t\u00edm v\u00e0o dung d\u1ecbch NaOH, dung d\u1ecbch c\u00f3 m\u00e0u xanh, nh\u1ecf t\u1eeb t\u1eeb dung d\u1ecbch HCl cho t\u1edbi d\u01b0 v\u00e0o dung d\u1ecbch c\u00f3 m\u00e0u xanh tr\u00ean th\u00ec: A. M\u00e0u xanh v\u1eabn kh\u00f4ng thay \u0111\u1ed5i. B. M\u00e0u xanh nh\u1ea1t d\u1ea7n r\u1ed3i m\u1ea5t h\u1eb3n C. M\u00e0u xanh nh\u1ea1t d\u1ea7n, m\u1ea5t h\u1eb3n r\u1ed3i chuy\u1ec3n sang m\u00e0u \u0111\u1ecf D. M\u00e0u xanh \u0111\u1eadm th\u00eam d\u1ea7n ......................................... Tr\u00ean \u0111\u00e2y VnDoc.com v\u1eeba gi\u1edbi thi\u1ec7u t\u1edbi c\u00e1c b\u1ea1n b\u00e0i vi\u1ebft Dung d\u1ecbch n\u00e0o sau \u0111\u00e2y c\u00f3 pH < 7, b\u00e0i vi\u1ebft \u0111\u00e3 cho c\u00e1c b\u1ea1n th\u1ea5y nh\u1eefng dung d\u1ecbch c\u00f3 \u0111\u1ed9 pH nh\u1ecf h\u01a1n 7. Mong r\u1eb1ng qua b\u00e0i vi\u1ebft n\u00e0y c\u00e1c b\u1ea1n c\u00f3 th\u1ec3 h\u1ecdc t\u1eadp t\u1ed1t h\u01a1n m\u00f4n H\u00f3a h\u1ecdc l\u1edbp 11. M\u1eddi c\u00e1c b\u1ea1n c\u00f9ng tham kh\u1ea3o th\u00eam ki\u1ebfn th\u1ee9c c\u00e1c m\u1ee5c Tr\u1eafc nghi\u1ec7m H\u00f3a h\u1ecdc 11... >> M\u1eddi c\u00e1c b\u1ea1n tham kh\u1ea3o th\u00eam t\u00e0i li\u1ec7u li\u00ean quan Dung d\u1ecbch ch\u1ea5t n\u00e0o sau \u0111\u00e2y c\u00f3 pH b\u00e9 h\u01a1n 7 C\u00e2u n\u00e0o sai khi n\u00f3i v\u1ec1 pH v\u00e0 pOH c\u1ee7a dung d\u1ecbch Dung d\u1ecbch ch\u1ea5t n\u00e0o sau \u0111\u00e2y c\u00f3 pH l\u1edbn nh\u1ea5t Dung d\u1ecbch n\u00e0o sau \u0111\u00e2y c\u00f3 gi\u00e1 tr\u1ecb pH l\u1edbn h\u01a1n 7 Dung d\u1ecbch mu\u1ed1i n\u00e0o sau \u0111\u00e2y c\u00f3 pH 7 Dung d\u1ecbch n\u00e0o sau \u0111\u00e2y c\u00f3 pH >7 pH l\u00e0 g\u00ec? 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Dung dịch nào sau đây có pH

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Thời điểm uống chanh mật ong giúp giảm cân
Đảm bảo sự vững mạnh về chính trị là nguyên tắc cơ bản trong xây dựng quân đội kiểu mới của giai cấp vô sản. Nắm vững nguyên lý đó, 70 năm qua, Đảng ta luôn quan tâm xây dựng Quân đội vững mạnh về chính trị. Đó là bài học xuyên suốt quá trình xây dựng, chiến đấu, trưởng thành, chiến thắng của Quân đội nhân dân Việt Nam.

Độ pH được hiểu là mức độ hoạt động của ion H+ trong môi trường dung dịch dưới sự tác động bởi 1 hằng số điện ly. Tất cả các dung dịch tồn tại ở dạng lỏng đều có 1 độ pH riêng và pH ảnh hưởng đến chất lỏng đó có lợi hay có hại.

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pH được định nghĩa là logarit âm của nồng độ ion hydro chạy từ 0 đến 14. Nó được thể hiện bằng toán học như sau :

Công thức tính độ pH: pH = -log[H+]

Trong phòng thí nghiệm hoặc trong các nghiên cứu hầu như tất cả các quá trình có sự tồn tại của nước đều cần đo pH. Việc này bao gồm chuẩn đoán hóa học, kiểm tra chất lượng nước khoa học môi trường và các thí nghiệm môi trường sinh học.

Tất cả các sinh vật sống đều phụ thuộc vào mức độ pH thích hợp để duy trì sự sống. Tất cả mọi người và động vật đều dựa vào cơ chế nội bộ để duy trì 1 nồng độ pH nhất định.

Đáp án hướng dẫn giải chi tiết

NaCl tạo bởi bazo mạnh (NaOH) và axit mạnh (HCl) => môi trường trung tính (pH = 7)

Na2CO3 tạo bởi bazo mạnh (NaOH) và axit yếu (H2CO3) => môi trường kiềm (pH > 7)

NaOH là bazo mạnh Ba(OH)2 => môi trường bazo (pH > 7)

HCl là axit mạnh => Môi trường axit (pH

Đáp án B

Câu hỏi bài tập vận dụng liên quan

Câu 1. Cho dãy các chất sau: K2O, P2O5, Na2O, Fe3O4, ZnO, MgO, CuO, Al2O3, BaO, FeO. Trong các chất trên. Số chất tan được trong nước tạo ra dung dịch có pH > 7 là:

A. 4

B. 5

C. 3

D. 6

Câu 2. Dung dịch muối nào sau đây có pH > 7

A. KCl.

B. Na2CO3.

C. Ba(NO3)2.

D. NH4Cl.

Câu 3. Cho ba dung dịch NH3, KOH, Ca(OH)2 có cùng giá trị pH. Các dung dịch được sắp xếp theo thứ tự nồng độ mol tăng dần là:

A. NH3, KOH, Ca(OH)2

B. NH3, Ca(OH)2, KOH

C. KOH, NH3, Ca(OH)2

D. Ca(OH)2, KOH, NH3

Câu 4. Chọn phát biểu đúng về giá trị pH?

A. Giá trị pH tăng thì độ axit giảm.

B. Giá trị pH tăng thì độ axit tăng.

C. Dung dịch có pH

D. Dung dịch có pH >7 làm quỳ tím hoá đỏ.

Câu 5. Chất nào sau đây khi cho vào nước không làm thay đổi độ pH của dung dịch?

A. K2CO3.

B. Na2SO4.

C. HCl.

D. NH4Cl.

Câu 6. Dãy sắp xếp các dung dịch loãng có nồng độ mol/l như nhau theo thứ tự pH tăng dần là

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A. KHSO4, HF, H2SO4, Na2CO3.

B. HF, H2SO4, Na2CO3, KHSO4.

C. H2SO4, KHSO4, HF, Na2CO3.

D. HF, KHSO4, H2SO4, Na2CO3.

Câu 7. Dung dịch có pH > 7 là

A. FeCl2.

B. Na2SO4.

C. K2CO3.

D. Al2(SO4)3.

Câu 8. Cho các chất sau: KOH, HCl, NH3, KCl, KHSO4, C2H5OH. Số chất dung dịch có pH > 7 là:

A. 2

B. 3

C. 5

D. 4

Câu 9. Dung dịch có giá trị pH > 7 sẽ làm quỳ tím

A. chuyển sang màu đỏ.

B. chuyển sang màu xanh.

C. quỳ không đổi màu.

D. không xác định được.

Câu 10. Dung dịch có pH

A. CaCl2.

B. K2SO3.

C. Na2CO3.

D. CuSO4 .

Câu 11. Dung dịch có pH >7, tác dụng được với dung dịch Na2SO4 tạo kết tủa là:

A. KOH

B. H2SO4

C. Ba(OH)2

D. BaCl2

Câu 12. Cho các dung dịch sau: KHSO4, AlCl3, Na2SO4, Na2S, Ca(NO3)2. Số dung dịch có pH

A. 1.

B. 2.

C. 3.

D. 4

Câu 13. Nội dung nhận định nào dưới đây là chính xác

A. Môi trường kiềm có pH

B. Môi trường kiềm có pH > 7.

C. Môi trường trung tính có pH = 7.

D. Môi trường axit có pH

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Câu 14. Các nhóm kim loại nào sau đây phản ứng với HCl sinh ra khí H2?

A. Fe, Ag, NaK, Ag, Al, Ca

B. Cu, Fe, Zn, Al, Mg, Na

C. Mg, K, Fe, Al, Na

D. Zn, Cu, K, Mg, Ag, Al, Ca

Câu 15. Cho hỗn hợp bột gồm các kim loại sau: Al, Fe, Mg và Ag vào dung dịch H2SO4 dư, sau phản ứng thu được chất rắn T không tan. Vậy T là:

A. Al.

B. Fe.

C. Mg.

D. Ag

Câu 16. Để phân biệt các chất đựng trong lọ riêng biệt sau: KNO3, Cu(NO3)2, Fe(NO3)3, Ba(NO3)2 người ta cần sử dụng hóa chất nào?

A. KOH, H2SO4

B. KCl, HCl

C. Ca(OH)2

D. BaCl2

Câu 17. Cho khí H2S lội qua dung dịch CuSO4 thấy có kết tủa màu xám đen xuất hiện, chứng tỏ:

A. Có phản ứng oxi hoá – khử xảy ra.

B. Có kết tủa CuS tạo thành, không tan trong axit mạnh.

C. Axit sunfuhiđric mạnh hơn axit sunfuric.

D. Axit sunfuric mạnh hơn axit sunfuhiđric.

Câu 18. Trường hợp nào sau đây không xảy ra phản ứng hóa học?

A. 3O2 + 2H2S → 2SO2 + 2H2O (to)

B. FeCl2 + H2S → 2HCl + FeS

C. O3 + 2KI + H2O → 2KOH + O2 + I2

D. Cl2 + 2NaOH → NaCl + NaClO + H2O

Câu 19. Cho mẩu quỳ tím vào ống nghiệm chứa dung dịch NaOH, sau đó tiếp tục nhỏ từ từ đến dư dung dịch H2SO4 vào ống nghiệm. Kết thúc phản ứng quỳ tím chuyển sang màu gì

A. Quỳ tím chuyển sang màu đỏ

B. Quỳ tím chuyển sang màu xanh

C. Quỳ tím không đổi màu

D. Quỳ tím đổi sáng màu vàng

Câu 20. Nhỏ một giọt quỳ tím vào dung dịch NaOH, dung dịch có màu xanh, nhỏ từ từ dung dịch HCl cho tới dư vào dung dịch có màu xanh trên thì:

A. Màu xanh vẫn không thay đổi.

B. Màu xanh nhạt dần rồi mất hẳn

C. Màu xanh nhạt dần, mất hẳn rồi chuyển sang màu đỏ

D. Màu xanh đậm thêm dần

…………………………………..

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