rgp chi khoa hgc TrUdng B^i hgc Quy Nhan So 1, T4p VII ndm 2013 XA Y D; /NG VA stf DUNG BAI T^P TH^/C TIEN TRONG DAY HQC HOA HQC 6 TRl/dNG TRUNG HQC PHO T H 6 N G TRINH Lfe H 6 N G P H U O N G '''' I M6D[.]
rgp chi khoa hgc TrUdng B^i hgc Quy Nhan - So 1, T4p VII ndm 2013 XA Y D ; / N G VA stf DUNG BAI T^P TH^/C TIEN TRONG DAY HQC HOA HQC TRl/dNG TRUNG HQC PHO T H N G TRINH Lfe H N G P H U O N G ' I.M6DAU Hda hpc la ngdnh khoa hpc tfng dung, cd vai trd quan trpng ddi song va nin kinh td" qud'c ddn Trong qud trinh hpc tap, thdng qua cdc bdi hpc cd tinh thtfc tidn, hpc sinh dtfdc cung cd' mo'i hdn hd giii'a 1^ thuyd't vdi tfng dung Tuy nhidn, nhidu ndm qua npi dung sdch gido khoa cdn ndng ve ly thuyd't va dieu kien thtfc te' cda nhieu trtfdng md vide truyen thu kid'n thtfc cd hen quan dd'n thifc te' cdn chUa dtfdc dau ttf ddng mtfc Mac du sdch gido khoa mdi (dp dung ttf nam 2007) da cd nhieu cai tid'n dang ke, nhieu ttf Ueu thUc te' dUdc dtfa vao nhiftig van cdn thid'u mot he tho'ng bai tdp hda hpc da dang va phong phu lien quan dd'n thtfc tiln, de vide day va hpc bd mdn hda hpc dtfdc phong phd hdn Vdi mong muon gdp phan ddi mdi va hoan thidn phtfdng phdp giang day, chung toi da nghien cu'u each thu'c xdy dtfng vd siJ dung bai tap thtfc tien day hpc mon hda hpc d trtfdng trung hpc thdng NOI DUNG 2.1 Khai iii^m bai tdp hoa HQC thtfc tien Bai tap hda hpc cd npi dung gan vdi thtfc tidn (BTHHTT) Id nhffng bai tap van dung nhffng kid^n thtfc hda hpc vdo cupc sdng va san xud't nham giai quyet mpt so' va'n de thtfc td' ddt 2.2 Tac dung cua bai tap hda hpc thtfc tien SiJ" dung BTHHTT se tao dieu kien cho hpc sinh sil dung nhieu gidc quan, phdt huy tinh tich ctfc, chu dpng, sang tao qua trinh hpc Do dd, ngoai nhffng tdc dung chung cua bai tap hda hpc thi BTHHTT cdn cd nhti'ng tdc dung sau: - Giup hpc sinh hieu biet ve thien nhidn, moi trtfdng, tai nguyen, cac hoat dpng ciia ngUdi ddi sdng, sdn xudt, nhffng van dl thdi stf mang tinh todn cau - Giup hpc sinh van dung cdc kie'n thtfc hda hpc nham phdt hidn va giai quyet nhttng vd^n de thtfc tidn dat qua dd nang cao chd't Itfdng cupc sd'ng - Ren luyen vd phat trien cdc ki nang hpc teip: thu thap thong tin, van dung kie'n thtfc cd ban vao cdc tinh huo'ng, lifa chpn kie'n thtfc de giai quyd't van de thtfc tidn - Ren luyen va phdt triin cac ki nang: ttf phdntich,tdng hdp, so sdnh, do'i chieu, TRINH Lfe H6NG PHUdNC - Kich tiiich stf hffng thu, tri to md, Idng say md nghidn ctfu khoa hpc cong nghe cua hpc sinh - Giup hpc sinh sd'ng cd trdch nhipm hdn doi vdi gia dinh, cpng ddng, dia phtfdng 2.3 Nguyen t^c xSy di^ng BTHHTT Nguyen tde BTHHTT phdi thUe hi$n muc tieu mdn hge Bai tdp nh^m giup hpc sinh khde sdu, van dung, phdt triin h$ thong tri thtfc da hpc, hinh va rdn luypn cdc ky ndng cd bdn Do dd xdy dtfng, Itfa chpn BTHHTT phai can ctf vdo muc tidu ciia chtfdng, bdi vd td'ng npi dung bdi Nguyin tdc Ddm bdo tinh chinh xde, khoa hgc, hien dgi Npi dung bdi tap dtfa phai dtfdc cap nhdt phii hdp vdi viec ddi mdi chtfdng trinh hpc Kid'n thtfc phai chinh xdc, tidnh bdi t$p vdi nhffng kie'n thtfc cdn dang tranh cai Nguyen tdc Ddm bdo tinh logic, hi thdng Cdc bai tap dtfdc sdp xe'p theo tffng chtfdng, tffng bdi, mffc dp khd tdng dan theo trinh dp phdt trien cua hpc sinh Nguyen tdc Ddm bdo tinh sUphgm Cdc kie'n thtfc bdn ngoai dtfa vdo lam bdi tap deu phdi qua khdu xff li stf pham dl phu hdp vdi phtfdng phdp gidng day va kich thich kha nangtid'pthu cua hpc sinh BTHHTT phai phii hdp vdi kha ndng nhdn thffc cua ta't ca hpc sinh Cdc hai tdp dUdc xdy dffng tff de de'n khd, tff van dung dd'n sdng tao de phdt huytinhtichctfc cua hpc sinh Neu tha'y hpc sinh da dat mtfc dp ndy thi tffng bffdc ndng d^n Idn mtfc dp cao hdn 2.4 Quy trinh xdy di/ng bai t$p thtfc tidn Budc 1: Phdn tich, xdc dinh mue tiiu eua chuang, cua bdi Vide dau tidn la xac dinh muc tieu cua chtfdng, cua bai NgUdi xay dtfng he tho'ng bdi tap can phai biet dUdc sau hpc xong chtfdng hoac bdi thi hpc sinh se dat dtfdc nhffng gi vl kid'n thffc, kl ndng va thdi dp Budc 2: Xdc dinh trgng tdm vd kii'n thiie ea bdn - Bdm sdt npi dung chtfdng trinh cua bp mon - Dpc them tdi hdu, sach tham khao de md rdng hieu bid't vl va'n de c^n giang day vd tao kha nang chpn dung kid'n thtfc cd bdn - Viec chpn lpc kie'n thffc cd ban cd the di liin vdi vide sap xep lai cau tnic cua bai tff lam noi bat cdc md'i hen he giffa cac phan kie'n thtfc va lam rd cdc trpng tdm cua bai XAY DUNG VA Sl/ DTJNG BAl TAP THUC TIEN TRONG DAY HOC HOA HOC 19 Budc 3: Tiin hdnh soan thdo - Soan tffng dang bai tdp - Xdy dtfng phtfdng dn giai bdi tap - Dtf kid'n cdc tinh hudng, nhffng sai l i m cffa hpc sinh cd the xay hpc sinh giai bdi tap va cdch kh^c phuc - Sdp xe'p cdc bdi tdp thdnh tffng loai theo ed'u u-uc da de Budc 4: Ldy y kii'n eua dong nghiep vd hodn thi^n - La'y y kien cffa chuydn gia vd ddng nghiep - Dtfa vdo suf dung qud trinh day hpc - Chinh sffa nhffng cho khie'm khuye't, chffa hdp 1^, bd sung nhihig chi tie't cdn thie'u - Hodn thidn 2.5 Sd" dyng BTHHTT d^y hpc hda hpc Trong thtfc td' day hpc hien nay, gido vien thtfdng sff dung bdi tap vdo cudi gid hpc, cudi chtfdng, cudi hpc ki, cuoi nam hpc de dn tap vd kiem tra kie'n thtfc Quan nidm nhtf vdy se lam giam tdc dung cua bdi tap hda hpc Cdc bdi tap hda hpc cd npi dung gan vdi thtfc tien cd the dtfdc su* dung tiong tdt ca cac btfdc cua qua trinh day hpc, ttf gidi thieu muc tieu de'n stf danh gid ke't qua hpc tdp cua hpc sinh Tuy theo tffng npi dung cua bai, cua chtfdng gido vien cd thd Itfa chpn sff dung bat ctf luc ndo de dat hieu qua cao nha't O bai nay, chung toi gidi thieu mpt sd cdch sff dung bdi tap thtfc tidn day hpc hda hpc SO: dung md ddu bdi gidng An ttfdng d i u tidn rd't quan trpng Mdi bdi hpc deu can co phan md ddu thuyet phuc, vl ba phut md dau sd ddn dat ca buoi hpc Md dau bai gidng la mot nhffng yd'u to quyd't dinh tinh toan ven cua bdi hpc, cd tac dung phat huy tinh tich ctfc, chu dpng sdng tao cua hpc sinh, tao khong phan khdi cho cdc em bat dau vao bai mdi Vidu: Bai 31 Hidro clorua - Axit clohidric - Hda hpc 10 nang cao Giao vidn ddt cdu hdi: Trdn thi trtfdng hien cd rd't nhieu san pha'm giup ta'y rffa nha tam, vi du nhtf: VIM, DUCK la nhffng san pha'm thong dung Nd giup ta'y sach vd't gi set, v i t hda vdi, vet xd phdng dpng lai, vd't tham den ke gach, Thanh p h l n quan trpng cd ti-ong nhffng san pham la: A HCI C H^SO, B NaOH D CaOCL TRINH L6 H6NG PHUdNG" Gido vien dan ddt: De hieu thdm ve tinh chat cua axit HCI cung nhtf tfng dung cua nd thUc td'chung la cOng tim hieu qua bdi 31 * Sii dung hinh thdnh kii'n thiic mdi BTHHTT dtfdc sff dung nghien ctfu tdi li?u mdi thtfdng Id nhffng bai tgp chffa dtfng cdc linh hud'ng cd van dl Tuy nhidn, sd' dung, gido vien can chpn Itfa mpt so' bdi tap thtfc lien chu yd'u d mffc (vdn dung kid'n thtfc de giai thich dtfdc cdc sff kien, hien ttfdng cua cau hdi li thuyd't), gidi ban d mtfc (van dung kien thffc hda hpc de giai thich nhffng tinh huo'ng xdy thtfc tien) vd cd npi dung gan gui vdi kinh nghidm sd'ng cua hpc sinh thi se dem lai hieu qud cao hdn Vi du: Bdi 44 Hidro sunfua - Hda hpc 10 ndng cao Trong phan tinh chd't vat H, gido vidn cd the dtfa bdi tap sau: Thanh phan chinh cua bioga gom cd metan (60 - 70%), hidro sunfua, cacbonic Quan sat md hinh ham bioga mdi cua Trung Qud'c, di Iff ham phai cho qua Binh Hdm sinh Hinh Md hinh hdm bioga mdi cua Trung Qud'c A hda tan hidro sunfua B loai bo mpt phan can ba cdn dtf C hda tan cacbonic D giam nhiet dp cua thoat Qua vide giai bdi tap hpc sinh se hieu, hidro sunfua Id chd't cd mui trffng tho'i, dpc nen can phai loai bd khdi bioga Ldi dung kha ndng tan ntfdc cua hidro sunfua md ta cd the' loai bo nd bang each cho bioga ldi qua ntfdc nhtf hinh tren Day Id each dao sau va md rpng kie'n thtfc ma khong ldm ndng ne khdi Itfdng kien thtfc cho cdc em Hdn nffa, bdi tap ndy giup cdc em hieu vd thay dtfdc y nghia thtfc tien cua bdi hpc X A Y D U N G VA s C DUNG BAl TAP T H U C T I I N TRONG DAY HOC H A HOC 21 * Sii dung tiet dn tap, luyin tap Muc dieh cffa gid dn tgp, luyen tgp Id td chffc, dieu khien hpc sinh tdng kd't, he thdng hda vd khdi qudt hda Ui thtfc, ki ndng sau da hpc xong mdt chtfdng, mdt phan hay todn bd chtfdng tnnh mdn hpc Cdc BTHHTT dtfa ti-ong gid on tap, luyen tdp ndn cd ndi dung tdng hdp, the hidn md'i lidn he chdt che giffa cdc kien thffc ddng thdi gidp hpc sinh khac sdu, he thdng vd md rpng tii thffc Vi du: Bdi 37 Luyen tap chUdng "Nhdm Halogen "-Ldp 10 nang cao Ydu cau cua hdi luyen tgp Id: - Nam vffng cdu tgo nguydn tff, dp am dien, so' oxi hda cffa cdc nguydn to' halogen tff dd h i l u dffdc sff gidng va khde ve tinh chat hda hpc giffa chiing - Nam vttng dtfdc tinh chd't hda hpc cd bdn cac hdp chat cua halogen vdi hidro, stf gidng vd khde gitta cdc hdp chat dd Biet dupc tinh chat va tfng dung mpt sd hdp chd't cffa clo vdi oxi - Dan dtfdc nhffng phdn tfng hda hpc de ehffng minh tinh chat cua cdc ddn chdt halogen vd hdp chat cua chdng - Nguydn tdc chung cua phtfdng phdp dieu che'halogen - Ren luyen ki nang giai bai todn hda hpc D I thffc hidn dtfdc nhffng yeu cau tren, ben canh nhffng cau hdi, bai tap mang npi dung thuan hda hpc, ngtfdi gido vien cd the sff dung nhffng cau hdi va bdi tap hda hpc thtfc tidn Vidu Nffdc bien chtfa mpt Itfdng nhd mudi natri bromua Bang each lam bay hdi ntfdc bien, ngffdi ta thu dtfdc dung dich chtfa NaBr vdi ham lUdng 40 g/l Can dung bao nhidu tit dung dich va bao nhidu lit clo (dktc) de dieu che' lit brom long (khd'i Itfdng rieng 3,12 kg/1)? (DS: 301,3 lit; 1310,4 lit) Vi du Trong y hpc, dtfdc pham Nabica (NaHCG^) dung de trung hda bdt Itfdng HCI dtf da ddy Tinh the tich HCI 0,04M (ndng dp axit da day) dtfdc trung hda vd the tich CO^ (dktc) sinh ud'ng 0,336 gam NaHCOj (DS:0,1 lit; 0,0896 lit) Vi du Kah iotua trdn tiong mud'i dn d l ldm mudi iol la mpt cha't rd't dd bi oxi hda thdnh Ij rdi bay hdi, nhat la cd mat nUdc hodc cdc chd't oxi hda cd mud'i, hoac d nhiet dp cao Theo nghidn cffu thi sau tiidng, Kl mud'i an se ma't hodn toan De de phdng dieu do, ngffdi ta han che ham Iffdng mudi mudi iot khdng vffdt qud 3,5% ve khd'i Itfdng (theo tidu chuan Lidn Xd cu) bang each cho thdm chd't dn dinh iot nhff Na2S203 Khi dd ed t h i giff Itfdng KI tiong mudi iot khoang thdng Tinh Itfdng ntfdc td'i da cho phdp cd ttong mot td'n mudi iot theo tidu chuan tten (DS: 3,5.10'g) TRINH LE HONG PHUCfNG* Nhffng vi du trdn gdn kid'n thtfc cda chtfdng vdi nhffng tinh hudng quen thuOc thtfc tien ndn cac em cd "diem ttfa" de ghi nhd nhttng kien thtfc dd Nhtf v§y, nhttng bai tap vffacd tdc dung dn tap, cung ed'kid'n thtfc cu, khdi qudt ki ndng, tri thtfc vffa tao tinh hudng mdi gidp hpc sinh van dung kie'n thffc da hpc d l giai quyd't vd'n de thtfc lien ddt * sa dung gid thuc hdnh D I tdn dung thdi gian cua gid thtfc hdnh, gido vien nen giao cdc BTHHTT de hpc sinh chuan bi trtfdc d nhd Ta't ca cdc BTHHTT dffa deu phai cdn ctf vdo muc tieu, nhiem vu npi dung cua bdi hpc vd trinh dp cua hpc sinh Vi du: Cdc BTHHTT chuan bi cho bdi thUc hdnh: "Tinh chat cdc hdp chat cua ItfU huynh "-Hda hpc 10 nang cao Khi hda tan mpt Itfdng nhd hidro sunfua ttong ntfdc dtfdc dung dich sudt khong mdu De Ip thuy tinh sud'l dffng dung dich dd ttong khdng vdi thi tha'y dung dich bi van due Hay gidi ihich hidn tffdng tren Khi lam thi nghidm, bat can, em bi vai gipt axit sunfuric dgc day vdo tay E m s e xff h tai nan nhtf thd'nao mpt cached hidu qua nhd't? Bie't rang ttong phdng thi nghiem cd day du cdc loai hda chat Khi lam thi nghiem de giam thilu Itfdng SO^, H^S thodt gay anh htfdng sffc khde, ngffdi la thffdng sue dng dan vdo binh dffng nao? Ben canh nhffng thi nghidm ttong sdch gido khoa giup hpc sinh nhd lai nhffng kie'n thffc da hpc vd ren ki ndng thffc hanh thi nhffng bdi tap thffc tien d tien giup cho gid thtfc hanh them sinh dpng, hap ddn Sau hodn thdnh bai tap, cdc em se cd them kinh nghiem Irong xff li tai nan hda cha't, ed y thtfc bao vd sffc khoe ban than va bao ve mdi trtfdng chi vdi nhffng hanh dpng rd't ddn gian nhtfng thie't thtfc * Sii dung hogt dgng ngodi gid lin ldp Trong cac hoat ddng ngoai khda, ngoai viec cho hpc sinh ttf tie'n hanh b i l u didn cac thi nghiem vui, gido vidn cd the cho hpc sinh lam mpt sd' bdi tap thtfc tidn gidp hpc sinh van dung cdc kid'n thffc dd hpc vao cupc song, qua dd khdi gdi n i l m dam md khoa hpc ndi chung va hda hpc ndi ridng Sau day la mpt so gdi y giup gido vidn td chffc hoat dpng ngoai gid Ien ldp dgt hieu qua cao: - Gido vien cd the giao trffdc BTHHTT cho cd nhan, nhdm hoac ca tap t h i (mdt ldp hoac nhieu ldp), yeu cau hpc sinh thu thap, phan tich, xff l$i thdng tin, - Cudi budi ngoai khda, giao vidn giao them BTHHTT d l hpc sinh vie't tiiu hoach, vach ke' hoach hanh dpng thie't thtfc Vidu: Hoat ddng ngoai khda " nhiem khdng khi"- ldp 10 XAY DUNG VA sis DUNG BAI TAP THUC TIEN TRONG DAY HQC H6A HOC Hinh Anh hudng cua axit den moi trudng sdng Ldng dd Non Ntfdc ttong khu du lich Ngu Hdnh Sdn-Dd Ndng la mpt dia diem tham quan ndi tie'ng da va dang thu hut mpt lUdng Idn du khdch vd ngoai nffdc Khi de'n day, du khdch dtfdc xem ta't ca cdc giai doan (ctfa, xe, due, deo dd, mai giua, ddnh bdng ttfdng) de lam mpt san pham thu cdng mi nghe ttf dd (ttfpng Phdt, htfdu nai, my nhan ngU, ) Trong qud trinh mai giua, ddnh bdng ttfdng, nhffng ngtfdi thd d day dd hda axit sunfuric vdo ntfdc roi tttfc tiep len ttfdng, nhtf vdy da rut ngan dtfdc thdi gian va cdng stfc mpt cdch ddng ke Ntfdc axit ttdn xudng sdn rdi chay ngoai dtfdng a Theo em, vide stf dung axit nhtf vdy cd anh htfdng nhU thd'ndo dd'n mdi trUdng? b Em hay de nghi cdch lam giam Iffdng axit sunfuric thai moi trtfdng cho ttfng hp ddn ttong lang nghe dd? Hoat dpng ngoai khda dffdc coi nhff mot cac hinh thffc ddnh gid hpc sinh theo quan diem phdt triin toan dien vd cang cd y nghia hdn nd'u cdc hoat dpng ngoai khda cd tdc dpng trd lai, giup hpc sinh cd thdm hffng thu, niem vui hpc tap va ren luyen dao dffc Bdi tap vtfa giup hpc sinh nhd lai kie'n thtfc da hpc, van dung kid'n thtfc de giai quyd't van d l thtfc tidn dat ra, vtfa tao dieu kien cho cac em trinh bay y kid'n cd nhdn, phdt huy tinh sang tao; dieu ldm budi ngoai khda thdm bd ich, hpc sinh tham gia vdi niem dam me, ttf nguyen, "hpc md chdi, chdi ma hpc" 2.6 Thtfc nghidm stf phgm Chung tdi da tie'n hanh thtfc nghiem nham k i l m tra tinh kha thi va hidu qua cua vide xay dtfng va sff dung he thdng BTHHTT day hpc mdn hda h p c l d p 10 nang cao Chung tdi dd Itfa chpn ldp gdm: ldp thtfc nghidm (TN) va ldp ddi chtfng (DC) d trtfdng thupc tinh: Dong Nai (THPT Tran Bien vd THPT Ngd Quyen) vd tiidnh phd'Hd Chi Minh (THPT Bui Thi Xuan vd THPT Nguyin Thffdng Hien) de tid'n hdnh thffc nghiem Vdi mdi cap tiitfc nghiem, chung tdi chon ldp cd trinh dp ttfdng dffdng nhau, dd mot ldp dgy theo gido an ttuyen thdng vd mpt ldp day theo gido dn thtfc nghidm Kd't qua thtfc nghidm the hien qua cdc gid tri sau: TRINH L6 H6NO PHlfCjNff Bang ; Phdn phoi tdn s6', tdn suat, tdn suit tich luy (tdng hgp bdi TN) Diem X 10 Tong % HS dat diem X, trd xuong % HS dat diem X, So HS dat diem X, TN DC TN DC TN DC 0 0 23 50 87 99 81 75 424 0 32 58 96 82 74 47 23 422 0.0 0.0 0.0 0.2 2.1 7.6 13.7 22.7 19.4 17.5 11.1 5.5 100.0 0.0 0.0 0.0 0.2 2.4 10.0 23.7 46.4 65.9 83.4 94.5 100.0 0.0 0.0 0.0 2.1 5.4 11.8 20.5 23.3 19.1 17.7 100.0 0.0 0.0 0.0 2.1 7.5 19.3 39.8 63.2 82.3 100.0 Bang Kit qud hgc tap eua hgc sinh (tdng hop bdi TN) i3r~~-~s Yeu - Kem Trung binh Kha Gioi TN DC 2.1 10.0 17.2 36.5 43.9 37.0 36.8 16.5 Bang Cdc tham so'thdng ke ddc trung (tdng hgp bdi TN) Ldp TN DC XTB±™ S^ S 7.86 ± 0,08 6.73 ± 0,08 2.39 2.91 1.55 1.71 V 19.66 T 10.1 25.34 Chon a = 0,05 vdi k = 844; T ^ ^ = 1,96 Ta cd T = 10.1 > T ^^, vay stf khac giffa X.^ va Xj,^ la co y nghla Phdn tich ke't qud thuc nghiem Can ciJ vao ket qua xij li so' lieu TN cho tha'y: - Diem trung binh cong ctia cac ldp TN luon cao hdn cac ldp DC, chiing to ldp TN cd ke't qua hoc tap cao hdn ldp DC X A Y DUNG VA sO DUNG BAl TAP THlJC TifeN TRONG DAY HOC H6A HOC 25 - Ti Id HS dat d i l m khd gioi d cdc ldp TN cao hdn cdc ldp ddi ehtfng - Hd sd b i i n thien V cua Idp TN ludn nhd hdn ldp DC, diiu ndy cho tha'y ch^t Itfdng ldp TN deu hdn ldp DC - He sd k i l m dinh T > T ^^., vdy stf khde gitta d i l m trung binh cua ldp TN vd ldp DC la cd y nghia v l mat tho'ng ke - Do thi dtfdng luy tieh cua ldp TN ludn ndm d bdn phdi vd dtfdi ldp DC, nghia la ldp TN cd k i t qud hpe tap cao hdn ldp DC Nhtf vdy, vide sff dung BTHHTT Id rd't can thie't, gdp phan da dang he thdng bai tap hda hpc phd thdng vd nang eao kd't qua hpc tap cho hpc sinh KET LUAN Vide nghien cuti cdch xdy dffng vd sff dung bai tap thffc tien dgy hpc hda hpc d THPT, chung tdi da dffa cdc van d l sau: - Khdi niem vd tdc dung BTHHTT - Nguyen tdc xay dffng BTHHTT - Quy ttinh xay dffng BTHHTT - Sff dung BTHHTT ttong day hpc hda hpe d THPT - Thtfc nghidm sff phgm nham ddnh gid tinh kha thi va hieu qua cua viec sff dung BTHHTT ttong dgy hpc hda hpc d ttung hpc thdng Thong qua vide nghidn ctfu, chdng tdi tha'y rang xay dtfng vd sff dung bdi tap hda hpc cd npi dung gan vdi thtfc tidn la can thid't Nd cd tdc dung ddng ke viec giup cho hpc sinh hffng thff hpc tap, ndng cao kd't qua day hpc Hy vpng nhttng ke't qua nghien effu cua chung tdi se gdp phan tich ctfc vao vide ndng cao chat Itfdng day hpc dTHPT TAI LIEU THAM KHAO [1] Tran Thi Phffdng Thdo, Xdy dUng he thdng bdi tap trdc nghiem Ichdch quan vi hoa hgc cd ngi dung gan vdi thuc tiin, Luan van thac si Giao due hpc, Dai hoc Sff pham Tp.HCM, (2008) [2] Le Thi Kim Thoa, Tuyen chgn vd xdy dung he thdng bdi tap hoa hoc thuc tiin dUng dgy hgc hoa hgc d trudng THPT, Luan van thac si Giao due hpc, Dai hpc Sff pham Tp.HCM, (2009) [3] Nguyin Xudn Trtfdng, Bdi tap hoa hgc d trudng phd thong, Nxb Dai hoc Stf pham, (2003) TRINH L H N G PHUCfNG" DESIGNING AND USING PRACTICALLY ORIENTED EXERCISES IN TEACHING CHEMISTRY AT HIGH SCHOOLS Trinh Le Hong Phuong Chemistry exercises with real-life practical content are those which apply chemistry knowledge into our daily-life and manufacturing processes They help students discover and solve problems posed by nature and real life, through which stimulate students' curiosity, excitement, and the unswerving love for scientific research Chemistry exercises with real-life practical content are primarily devised from principles, processes and can be used in steps as lead-in, new knowledge formulation, revision, practice, experiment and outside classroom activities 'Khoa Hda hoc, Dai hoc SiTpham th^nh Ho Chi Minh Ngay nhan bii: 04/4/2012, Ng^y nhan dang: 04/6/2012 ... 301,3 lit; 1310,4 lit) Vi du Trong y hpc, dtfdc pham Nabica (NaHCG^) dung de trung hda bdt Itfdng HCI dtf da ddy Tinh the tich HCI 0,04M (ndng dp axit da day) dtfdc trung hda vd the tich CO^ (dktc)... ndng cao Trong phan tinh chd''t vat H, gido vidn cd the dtfa bdi tap sau: Thanh phan chinh cua bioga gom cd metan (60 - 70%), hidro sunfua, cacbonic Quan sat md hinh ham bioga mdi cua Trung Qud''c,... eua hgc sinh (tdng hop bdi TN) i3r~~-~s Yeu - Kem Trung binh Kha Gioi TN DC 2.1 10.0 17.2 36.5 43.9 37.0 36.8 16.5 Bang Cdc tham so''thdng ke ddc trung (tdng hgp bdi TN) Ldp TN DC XTB±™ S^ S 7.86