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1. K\u1ef9 n\u0103ng \u00f4n t\u1eadp l\u00fd thuy\u1ebft H\u00f3a h\u1ecdc<\/strong><\/p>\n

V\u1edbi ph\u1ea7n ki\u1ebfn th\u1ee9c l\u00fd thuy\u1ebft, c\u00f4 Ng\u1ecdc Huy\u1ec1n khuy\u00ean c\u00e1c em n\u00ean \u00f4n theo t\u1eebng ph\u00e2n m\u00f4n: h\u00f3a v\u00f4 c\u01a1, h\u00f3a h\u1eefu c\u01a1. \u00d4n xong ph\u1ea7n n\u00e0o, c\u00e1c em n\u00ean ch\u1ed1t tr\u1ecdng t\u00e2m, ghi ra s\u1ed5 tay ph\u1ea7n \u0111\u00f3.<\/p>\n

C\u00e1c em c\u1ea7n ch\u00fa \u00fd k\u1ef9 nh\u1eefng ki\u1ebfn th\u1ee9c tr\u1ecdng t\u00e2m nh\u01b0: C\u00f4ng th\u1ee9c c\u00e1c ch\u1ea5t ph\u1ed5 bi\u1ebfn trong th\u1ef1c t\u1ebf; C\u00e1c s\u1ed1 \u0111\u1ed3ng ph\u00e2n c\u1ee7a c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 th\u00f4ng d\u1ee5ng; C\u00e1ch vi\u1ebft c\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o v\u00e0 c\u00e1ch g\u1ecdi t\u00ean c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u00e3 h\u1ecdc; Thu\u1ed9c l\u00f2ng d\u00e3y \u0111i\u1ec7n h\u00f3a v\u00e0 c\u00e1ch v\u1eadn d\u1ee5ng; \u00d4n c\u00e1ch c\u00e2n b\u1eb1ng ph\u1ea3n \u1ee9ng oxi h\u00f3a \u2013 kh\u1eed.<\/p>\n

2. K\u1ef9 n\u0103ng \u00f4n t\u1eadp ph\u1ea7n b\u00e0i t\u1eadp H\u00f3a h\u1ecdc<\/strong><\/p>\n

V\u1ec1 ph\u1ea7n b\u00e0i t\u1eadp, c\u00f4 Ng\u1ecdc Huy\u1ec1n l\u01b0u \u00fd h\u1ecdc sinh n\u00ean \u00f4n theo c\u00e1c d\u1ea1ng to\u00e1n c\u1ee5 th\u1ec3: \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n kh\u1ed1i l\u01b0\u1ee3ng (t\u0103ng gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng), b\u1ea3o to\u00e0n e, b\u1ea3o to\u00e0n \u0111i\u1ec7n t\u00edch, b\u1ea3o to\u00e0n nguy\u00ean t\u1ed1\u2026<\/p>\n

V\u1edbi m\u1ed7i d\u1ea1ng, h\u1ecdc sinh c\u1ea7n xem c\u00e1ch gi\u1ea3i c\u1ee7a 1, 2 b\u00e0i c\u1ee5 th\u1ec3 \u0111\u1ec3 n\u1eafm \u0111\u01b0\u1ee3c nguy\u00ean t\u1eafc chung. \u0110\u1ed3ng th\u1eddi xem l\u1ea1i c\u00e1ch gi\u1ea3i m\u1ed9t s\u1ed1 b\u00e0i to\u00e1n t\u1ed5ng h\u1ee3p; T\u1eadp ph\u00e2n t\u00edch \u0111\u1ec1 \u0111\u1ec3 c\u00f3 h\u01b0\u1edbng gi\u1ea3i th\u00edch h\u1ee3p, nhanh, g\u1ecdn.<\/p>\n

3. K\u1ef9 n\u0103ng l\u00e0m b\u00e0i thi tr\u1eafc nghi\u1ec7m H\u00f3a h\u1ecdc<\/strong><\/p>\n

\u0110\u1ec3 gi\u00fap h\u1ecdc sinh l\u00e0m t\u1ed1t b\u00e0i thi tr\u1eafc nghi\u1ec7m H\u00f3a h\u1ecdc, c\u00f4 Ng\u1ecdc Huy\u1ec1n chia s\u1ebb m\u1ed9t s\u1ed1 kinh nghi\u1ec7m v\u00e0 k\u1ef9 n\u0103ng c\u01a1 b\u1ea3n:<\/p>\n

– \u0110\u1ecdc k\u1ef9 \u0111\u1ec1 (c\u1ea3 \u0111\u00e1p \u00e1n) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh d\u1ea1ng b\u00e0i t\u1eadp m\u00e0 suy ra c\u00e1ch gi\u1ea3i ph\u00f9 h\u1ee3p.<\/p>\n

– D\u1ef1a v\u00e0o \u0111\u00e1p \u00e1n \u0111\u1ec3 c\u00f3 th\u1ec3 ch\u1ecdn theo ph\u01b0\u01a1ng ph\u00e1p lo\u1ea1i tr\u1eeb ho\u1eb7c c\u00f3 th\u00eam d\u1eef ki\u1ec7n \u0111\u1ec3 gi\u1ea3i b\u00e0i ho\u00e0n ch\u1ec9nh.<\/p>\n

– N\u00ean l\u00e0m c\u00e2u d\u1ec5 tr\u01b0\u1edbc (\u00edt t\u1ed1n th\u1eddi gian).<\/p>\n

– V\u1edbi d\u1ea1ng b\u00e0i l\u1ea1 c\u1ee9 b\u00ecnh t\u0129nh \u0111\u1ecdc k\u1ef9 \u0111\u1ec1 v\u00e0 gi\u1ea3i t\u1eebng b\u01b0\u1edbc s\u1ebd ra.<\/p>\n

V\u00ed d\u1ee5: V\u1edbi b\u00e0i ch\u1ec9 c\u00f3 1 ph\u01b0\u01a1ng tr\u00ecnh m\u00e0 2 \u1ea9n s\u1ed1, c\u1ee9 gi\u1ea3i s\u1ebd r\u00fat g\u1ecdn \u0111\u01b0\u1ee3c th\u00f4i.<\/p>\n

– T\u1eadn d\u1ee5ng t\u1ed1i \u0111a c\u00e1cc\u00f4ng th\u1ee9c \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ecdc cho m\u1ed7i d\u1ea1ng b\u00e0i \u0111\u1ec3 gi\u1ea3i nhanh, kh\u00f4ng c\u1ea7n gi\u1ea3i t\u1ef1 lu\u1eadn.<\/p>\n

– V\u1edbi m\u1ed9t s\u1ed1 b\u00e0i c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o con s\u1ed1 \u0111\u1ec1 b\u00e0i cho m\u00e0 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c ngay \u0111\u00e1p \u00e1n, kh\u00f4ng c\u1ea7n gi\u1ea3i (n\u1ebfu th\u1eddi gian kh\u00f4ng c\u00f2n nhi\u1ec1u).<\/p>\n

V\u00ed d\u1ee5: Cho 10,8g KL \u2192 X\u00e1c \u0111\u1ecbnh KL \u2192 Th\u01b0\u1eddng l\u00e0 Al.<\/p>\n

11,2g KL \u2192 X\u00e1c \u0111\u1ecbnh KL \u2192 Th\u01b0\u1eddng l\u00e0 Fe.<\/p>\n

– N\u1ebfu ch\u01b0a ch\u1eafc v\u1edbi l\u1ef1a ch\u1ecdn, c\u00e1c em n\u00ean th\u1eed ki\u1ec3m tra l\u1ea1i.<\/p>\n

– Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng b\u1ecf c\u00e2u. N\u1ebfu kh\u00f4ng ch\u1eafc ch\u1eafn m\u1ed9t \u0111\u00e1p \u00e1n n\u00e0o, h\u00e3y ch\u1ecdn m\u1ed9t \u0111\u00e1p \u00e1n theo tr\u1ef1c quan.<\/p>\n

4. Th\u1eddi gian \u00f4n t\u1eadp h\u1ee3p l\u00fd<\/strong><\/p>\n

V\u1ec1 th\u1eddi gian \u00f4n t\u1eadp, c\u00f4 Ng\u1ecdc Huy\u1ec1n \u0111\u01b0a ra nh\u1eefng h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3: Tr\u01b0\u1edbc ng\u00e0y thi 1 th\u00e1ng, c\u00f9ng v\u1edbi vi\u1ec7c \u00f4n t\u1eadp ki\u1ebfn th\u1ee9c c\u00e1c m\u00f4n h\u1ecdc kh\u00e1c, c\u1ee9 2 ng\u00e0y h\u1ecdc sinh d\u00e0nh kho\u1ea3ng 2 ti\u1ebfng \u00f4n 1 ch\u01b0\u01a1ng c\u1ee7a l\u1edbp 12 (7 ch\u01b0\u01a1ng x 2 = 14 ng\u00e0y). Sau \u0111\u00f3 \u00f4n ki\u1ebfn th\u1ee9c l\u1edbp 10: ch\u1ee7 y\u1ebfu ph\u1ea3n \u1ee9ng oxi h\u00f3a \u2013 kh\u1eed v\u00e0 t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng, c\u00e2n b\u1eb1ng h\u00f3a h\u1ecdc (2 ng\u00e0y). \u00d4n ki\u1ebfn th\u1ee9c l\u1edbp 11: ch\u1ee7 y\u1ebfu ch\u01b0\u01a1ng HNO3 v\u00e0 hi\u0111rocacbon (3 ng\u00e0y.<\/p>\n

– Tr\u01b0\u1edbc thi 10 ng\u00e0y:<\/p>\n

+ \u00d4n c\u00e1c c\u00f4ng th\u1ee9c c\u1ea7n nh\u1edb, c\u00e1c c\u00e2u l\u00fd thuy\u1ebft tr\u1ecdng t\u00e2m.<\/p>\n

+ Xem l\u1ea1i v\u00e0i b\u00e0i t\u1eadp kh\u00f3 \u2192 C\u00e1ch gi\u1ea3i.<\/p>\n

– Tr\u01b0\u1edbc thi 3 ng\u00e0y:<\/p>\n

+ Ngh\u1ec9 ng\u01a1i cho tinh th\u1ea7n tho\u1ea3i m\u00e1i.<\/p>\n

5. B\u00ed quy\u1ebft gi\u1eef s\u1ee9c kh\u1ecfe tr\u01b0\u1edbc k\u1ef3 thi<\/strong><\/p>\n

V\u1edbi kinh nghi\u1ec7m nhi\u1ec1u n\u0103m gi\u00fap h\u1ecdc sinh chu\u1ea9n b\u1ecb ki\u1ebfn th\u1ee9c v\u00e0 t\u00e2m th\u1ebf cho nh\u1eefng k\u1ef3 thi quan tr\u1ecdng, c\u00f4 Ng\u1ecdc Huy\u1ec1n \u0111\u1eb7c bi\u1ec7t l\u01b0u \u00fd h\u1ecdc sinh n\u00ean gi\u1eef g\u00ecn s\u1ee9c kh\u1ecfe v\u00e0 t\u00e2m l\u00fd v\u1eefng v\u00e0ng \u0111\u1ec3 “h\u00e1i qu\u1ea3” th\u00e0nh c\u00f4ng.<\/p>\n

C\u00e1c em c\u1ea7n ng\u1ee7 \u0111\u1ee7 gi\u1ea5c v\u00e0 \u0111\u00fang gi\u1edd (kho\u1ea3ng 6 ti\u1ebfng v\u00e0o bu\u1ed5i t\u1ed1i: t\u1eeb 22 gi\u1edd 30 ph\u00fat \u0111\u1ebfn 5 gi\u1edd s\u00e1ng), tr\u01b0a ngh\u1ec9 kho\u1ea3ng 30 ph\u00fat sau \u0103n tr\u01b0a; \u0102n u\u1ed1ng \u0111\u1ee7 ch\u1ea5t dinh d\u01b0\u1ee1ng, \u0103n nhi\u1ec1u tr\u00e1i c\u00e2y (c\u00f3 th\u1ec3 ch\u00fa \u00fd \u0111\u1ebfn t\u00e1o).<\/p>\n

H\u1ea1n ch\u1ebf ho\u1eb7c t\u1ea1m “cai” l\u01b0\u01a1t web v\u00ec s\u1ebd \u1ea3nh h\u01b0\u1edfng nhi\u1ec1u \u0111\u1ebfn vi\u1ec7c nh\u1edb ki\u1ebfn th\u1ee9c, t\u1ed1n th\u1eddi gian. C\u00e1c em n\u00ean t\u1eadp th\u1ec3 d\u1ee5c nh\u1eb9 nh\u00e0ng v\u00e0o m\u1ed7i bu\u1ed5i s\u00e1ng th\u1ee9c d\u1eady \u0111\u1ec3 tinh th\u1ea7n s\u1ea3ng kho\u00e1i cho 1 ng\u00e0y \u00f4n t\u1eadp m\u1edbi.<\/p>\n<\/div>\n

Kim Thoa (ghi)<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

X\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m ki\u1ebfn th\u1ee9c, ph\u00e2n b\u1ed5 th\u1eddi gian \u00f4n t\u1eadp h\u1ee3p l\u00fd, gi\u1eef g\u00ecn s\u1ee9c kh\u1ecfe v\u00e0 t\u00e2m l\u00fd v\u1eefng v\u00e0ng s\u1ebd gi\u00fap c\u00e1c em c\u00f3 m\u1ed9t b\u00e0i thi \u0111\u1ea1t k\u1ebft qu\u1ea3 nh\u01b0 mong \u0111\u1ee3i. C\u00f4 gi\u00e1o Nguy\u1ec5n \u0110\u1eb7ng Th\u1ecb Ng\u1ecdc Huy\u1ec1n – T\u1ed5 tr\u01b0\u1edfng m\u00f4n H\u00f3a h\u1ecdc, Tr\u01b0\u1eddng THPT Tr\u1ea7n H\u01b0ng \u0110\u1ea1o […]<\/p>\n","protected":false},"author":2,"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":[159],"tags":[],"yoast_head":"\n