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a Dtg Tap chi KHOA HOC & CONG NGHE SI Dl N(; P H I O N G PHAP THAO LL \N NHOM (SE>nNA) TRONG VIEC OOI MOI PHI 0 \ C ; PHAP GIANG DAY HOC PHAN HOA PHAN TICH T \l TRI ONG DAI HOC NONG LAM THAI \ ( ; L \[.]
a Dtg Tap chi KHOA HOC & CONG NGHE SI Dl N(; P H I O N G PHAP T H A O LL.\N NHOM (SE>nNA) TRONG VIEC OOI MOI PHI \ C ; PHAP GIANG DAY HOC PHAN HOA PHAN TICH T.\l TRI ONG DAI H O C NONG LAM THAI \ ( ; L \ EN Bao Viet Hung' , Vii Thj Thu Le', Nguyen \lau Due" 'hin/ns Oai hoe "sdng lain DH Thai \yiiven -huongDaihoc '•irPham DlIHidi \gii\en TOM TA I Phirong phap semina d trudng Dai hgc va Cao dang c6 vai tro quan trgng gop phan dao lao nhiing can bo khoa hgc eo trinh cao va lii mgt cac phuong phap cho phep giai quyet mot each hieu qua nhirng nhiem vu hgc tap, giao due o cac Uuang Dai hoc & Cao dang N^u o phuong phap dien giang, thuyet trinh ngudi day hoat dong tich cue nguoi hgc co phan b] dgng thi o semma tinh nang dong lich cue ciia ngudi hoc duoc phat huy day du hon, smh vien thuc sir la chu the, trung tam cua qua trinh ITnh hoi ciic kien thirc, ho ciing hop lac dc Ihao luan giai quyet mot van dc khoa hoc Til' khoa' Seminar, hda phdn lich, pH, Sunfita Pynt GI61 THIEU TONG Q U A N VR PHUONG M i i i s6 dac diem co' ban ciia phuong phap PHAPSLMINA day hgc semina | , , 5| Semina la mgt nhung phuang phap (PP) dity hpc lich cue duac su dung Ihuong xuyen - Phai co chu de khoa boc nhiil dmh dc sinh vien ciin cir vao ma nghien ciiu irinh bay qua trinh doi moi PP day hoc hicn biio ciio thao luan tranh luan D e k h i i c phuc I6i truygn thu tri Ihiie mot chieu, loi hoc ihu dong, may moc, cim phai sir - Phiii cti ngutii(tliay cd) ui chiic, hming diui, ^}i£,^| khjcii dung phtii hop nhieu PP PP dav hoc truven ', ^ ' '' " lliting Vii PP day hoc hien dai, dti co ^ •", ", ^ , semina I nv nhien co nhicu liuiiiiz v kien irai , ••, ' - , r.r • ' - I chieuhgc ve vice van dung PP qua innh dav /-Co thao • 1 »- • • , i, -ike hoach to chuc cac lioijl tlomi trao doi luan - Co diinh liia kt:t gua va dinh hiuini: liep luc iigliit ' '' Thieu mtil tronu cac dac Irunii lrt:n semina s Semina la ui'' Theo lae gia Phan Ti"0im Ntio:' Semma tc{phirang ptu'tp trcmg ctd nhiun lim (lirp hoc) dmrc chiu ihimh ntnmg nhc'un ntio ""'^ ^''^ ^ ^ ' i ^ ^ ' ^ i vay kliong nen nham lan ^iLUi semma voi hmh thuc tranh luan, ihao cti kit ca cdc Ihimh vtin top cieu ctucrc IiiiU^ l^li'^'^^ '^l"i -J^ khong nguai huting diin, /(//// viic vd then) ludn ve mdl chit tti cu the vii etiai i' kien ehung cua nhdm minh ve vdn cle , PP lliiv cd mam mdim iir nhiiiui nam 70 cua 11,6 vi XX o IntbngDiu hoc Su phan, \ u nhuuc diem cua phu"o'ng phap semma ,• - -^^ " S dac h i d co i d , \icc Lap Ihii' D.^n dan, inon hoc „ay chu\en vdi IS nhiil nhal) ren luyen k\ nang lan, \icc Iheo hinh than), nen sei„ina d.i\ cac cap hoc 111 V i c l Nam PP dung rpng ra, Irong da> hiic lit _ [ j ^ , ^.^^ i^-,, ^.jm mo, ilmi,!, \icn lioni: nhom |,^^^ 1^^,, |.=|, |,|,,,„ ,;-,p |rj|^^^ „„|,^ ^ ^ i j ^ ^-^,;l „ „ ^ | ; „ ^|, |^, „„-,| ^ , j , |^,;.,; ,||,J„ in-,, , i , , i p ^^^^^^ ^^^^ ^ ^^^.^^ ^j,^,^;,, ,^1,,.,^ ,,,^,l ^ j ^ , , j - , ^ |jp ilhekN X X d.iulhek> li'l ll 0,H (ddt hi kiem qua) de ldm cho cdc hat keo ildt hi phdn tiin, di' hi rira trdi cdc chdt dinh dirirng cle lieu, ddt bi lay tut cdc chdt VI imrng bi ci) ctinh nhieu Cdy sinh Iriftmg yen vd cd the chet Nhir vay pH cua ddi itd cd anh hucmg rdi inctnh ctin ddi sdng cuu cdy trdng, Khi dat chua ( p l l < 4.5) co the dimg bicn phap bon voi, de ciu lliicii chua Voi bon vao dal ihudng d dang CaO hoac Ca(0H)2 n(:u lii bot da vol thi d dang CaCO; D^t phen va iinh h u d n g ciia p H (hap len doi song thiiy sinh vui Trong cac ITnh vuc san xual ndng nghiep cac van de ve cai tao diil san xuat cac viing diil nhiem phen dii dugc nhieu nha khoa hpc nghien ciiu va irng dung vao tlurc tien san xuat, Mpt nhfrng kho khan trd ngai sail xuat tren vimg diit phen la anh huong cua pH Kill pH ao nudi ca thap se Iiun cho ca chet hoae lang trirdng cham lam thuc an tu nhien kem phiit Irien v icc bon phan se CO hieu quii thap tiing anh hudng dgc to cua sat va nhcini Qua trinh hinh thiinh diit phen la eac chat hiru ca bj tich tu phiin huy dieu kien yem ed cac tap doan v khuan khu sunfua ehiing chuyiin hoa cac hop chat luu huynh (trong tlurc vat dk\ nude bien) Ihanh dang sunfua hydro (H^S) Fe(0H):-II:S FeS + S -^ -^ H.S + 2HC0-" FeS ••• H>0 FeS: (py rit) Viee nil nude qua can hay vao miia khd han se lam cho dat nirt ne khong theo eac du'dng nirt di chuyen xuong dudi tang dat CO chiia phen tiem tang, khong CO oxy nen dugc tiep xiic vdi khdng se xay qua trinh oxy hoa pynt ya sinh axil sunfuarie: 4FeS^ (pyril) + 150: + 14H:0 -^ 4Fe(0H), + 8S0j''-'- 16H Anh liifimg limy sinh: ctia pH thdp den ciin sdng cua p l l lii chi so dac trirng vc dti axil (chua) hoac dd kiem (chat) ciia mrdc p l l ihiip ehua nh\eu axil va pH eao chira nhicu kicm vii p l l - dugc ggi la lrung tinh Trong v ung et) pi riil cao hay riil ihap Ciic loai lliiiy thing vai khting sdng dtroc Tac dong cua pH den diii sting thuy smh y;it cti tinh chiil gian ticp chir khong llieo phuang thirc true liep p l l anh huong den qua trinh can biing hoii hoc, sinh hgc nude nhu can biing ammoniac, simtiia hydro, cio, ion kun loai va quii Irinh btin pluin cho ao hd Ap suiil thiim thau man cii hi ciic inutii vti CO qui dinh, A p suiil lluini thau cua niiiu vil dieh 1116 giu vai tro rat quan trgng Irong y iec dicu hoa su irao ddi mrdc giira mau va cac nio \ i e c dieu hoa ap suiil tham thiiu trirtic lien phai kc den mgl so cation ehu yeu nhu Nil K Ca"' Mg" cac cation hen kel vtVi cac anion tirong irng la C l HCO;' IIPOj"", Khi mau bien dting pH ihien vc acid hoiic kiem deu liim cho hoat linh cua he Ihting em/yine Irung Ie biio b\ anh lurtnig, dting thdi linh chiil lv litui hoc cua cac chiil te biiti Cling bi thay dtii Cii song irong nuii inning cti p l l Ihiip Ihl sti luong hdng ciiu irong mini Dao Viei Hiing vo Dig Tap chi KHOA HOC & CONG NGHE cao han d moi trudng co pH cao Do sdng moi trudng c6 pH thap kha nang tien k^t CLia oxy vdi hemoglobin giam vi su chenh lech ve ndng H' giira va ngoai ca Ehe HbH khong th^ phan ly Hb va H' do oxy khong the gan ket vdi hemoglobin Thdo luan chung cd liip Ticn hanh thao luan chung cho ca ldp theo npi dung ciia cac can hoi sau: Caul: Khai mem vt: gia tri pH'' Ciiu Cach xac dinh gia tn pH dung dich: axit baza, muoi thiiy phan ? Cau 3' Ung dung ctia viec nghien ciru gia tri pH vao canh lac nong nghiep va nuoi lluiy san? Dai dien nhom len trinh bay npi dung tra Idi Ciiu hoi ! bang MS.povyerpoint - Hudng dan cae nhom Ihao luan va trinh bay bti sung bang giay A,, - Ket luan - riuiyet trinh ket hpp voi giai thich vii nluin xL'l ket qua thao luan nhom I Dill dien nhom len trinh bay ngi dung Uii loi can hoi bang MS povverpoint, - I ludng dan cac nluim thao luan va,trinh bay bti sung bang giay Ao - Kel luan phan thao luan - Thuyel trinh kel hpp voi giai thich vii nhiin xt:t kel qua thao luan nhdm Dai dien nhom len trinh bay ngi dung tra Idi ciiu hoi bang MS,poyycrpoint - frinh chieu mtil so hinh anh minh hoa vice Ml ly dal trdng bi nhiem chua hoac nhiem p he'll, - Quail sat y a tir nil kt:i luiin Qua viec thuc Inen de tai semina nhom sinh vicn da giai quyel trpn ven nhiem vu da dal !ii lim hieu irng dung quan trpng ciia viec nghien ciru gia tri pH vao mgt so ITnh vtrc canh lac nong nghiep Tii giup smh vien eo su lien he thuc te mpl each hieu qua tinh lich cue va chll dpng cua smh v icn dugc phat huy 114(14) 135- 141 dong thdi ky nang cdng tac lam viec ky nang tim kiem, xu ly thdng tin VAN DE TO CHUC DANH GIA La van de quan trgng nang chat lugng kich thich tinh than hgc tap dam bao cong bang Diem l6i da ciia bao cao seminar la 3diem /IO di^m cho tiing mon hgc cu the Mot s6 ciic each to chuc danh gia sau day da duac thuc hien: - Sinh vien nhdm moi ngirdi mpt nhiem vu: suu tain tai lieu, trinh bay bao cao bang Povverpoint giay hoac bieu bang, bao cao seminar Diem danh gia cho mdi vien thong qua ket qua trinh bay ciia toan nhom, - Sinh vicn nhom phan cong nhu tren nhung diem danh gia co diem doitn ket giiip dd lan hoan nhiem vu ciia lung vien ( danh gia thong qua sir the hien ciia cac vien qua buoi bao eao va thao luan) -Sinh vicn nhom phiin cong nhu tren, diem cho boat dong hgp tac ciia nhom bao cao Seminar rat cu the: ca nhan bat ky nhom dugc ehi dinh tra loi eau hdi va dua vao ket qua trinh bay cua cac ca nhan nay, giao vien danh gia diem cho toim nhom Cach lam rat hieu qua: inoi sinh vien deu co gang nam vung nhu'ng van de co lien quan den npi dung bao cao HAN CHt TON TAI vA GlAl PHAP Theo 100% sinh vien cac tinb: hinh thuc hgc rat hay, nhung co rat nhieu kho khan viec thu thap thong tin Theo 70% sinh vien tai Dai hpc Nong Lam Dai hgc Thai Nguyen: viec thuc hien hinh thuc hgc se dat hieu qua rat cao neu chii y den van de bo sung nguon lu lieu d thu vien day dii dan vi tao dieu kicn sinh vien truy cap Internet thuan lien KET LUAN-KIEN NGHI Nhin chung semina la mgi nhirng hinh thuc to chirc day hgc ca ban d Cao dang va Dai hoc Dao Viet Himg vd Dig Tap chi KHOA HOC & CONG NGHF Semina phat t n e n kha nang tim kidin va van dung tri thuc ren luyen t u khoa hpc thoi quen lam viec nhom va trinh bay nhdng hi^u biel va quan diem ca nhan Vi vay moi sinh vien tham du cac budi 114(141 135- 141 de nghi m d rdng Day la hinh thdc dav hgc hieu qua: nang cao chat lirgng day hgc hinh ky nang tu nghien cdu tu hgc tap ky nang nghiep vu su pham lam quen vdi each lam viec tap the, semina can co su chuan bi chu dao de c u a n g thao luan hay bao cao va tich cue tham gia vao vice thao luan tranh luan gop phan tim kiem chan iy c h o nhdng van de khoa hgc da duoc neu Giang vien phat huy vai tro la nguoi to chdc, khuyen khich dong vien va hudng dan thao luan Hinh thuc semina g o p phan phal tnen nang luc chu dgng tich cue va sang tao cua sinh vien Mdl sd cac mon hpc thugc bg mdn Hoa hgc duoc day hgc bang bao cao seminar, Hinh thirc hgc tap d u g c smh vien yeu thich va TAI LIEU T H A M K H A O I, Meier Berd Nguyen Van Cirong Giao tnnh li luan day hoc dai hoc Du an trum: hoc co so Ha Noi 2005 Bo mon Hoa Khoa KHCB Trirong Dai hoc Nong Lam Bai giang Hoa phan tich 2012 3, Nguyen Cuong Tiep tuc doi moi phuong phap day va hoc Hoa hoc de nang cao chit luong dao tao giao vien Hoa hoc THCS o cac irucme CDSP Hoi thao lap huan trien khai chirong trinh giiio trinh CDSP- Bo GD & DT 2006 Tran Tir Hieu I loa hoc phan tich, lia Noi, 2005 5, G More lis and F J CarcKcn Trens and movation in education & didactics, lia \ o i 2003 SUMMARY A P P L Y I N G G R O U P O l S C l i S S I O N ( S E M I N A R ) IN T H K I ^ ^ O \ \ T I O N OF TKACHING ANALYTIC CHEMISTRY AT THF U N I V E R S I T Y O F A G R I C U L T U R E A N D F O R E S T R Y - M Dao Viel Hung'", \ u Thi Thu Lc' Njiuycu Mau Duc" < illei'col li-nLiihuie anj) on-an IM '< nlU'i^n nt I'hi^alion IM Group discussion, or seminar, drawn on al univcisilies and colleges has an important role in training advanced scientists, and is one of ihc meihods thai can errectivcly addiess learning and teaching Jobs at universities and colleges Willi the method of" Iccuinng and prcseniing, Iccliircrs play an aclive role whereas learners are quite passive In conluist wiili ihe inclht)d otseminar learners" active role is enhanced and strengthened, they are the ceniiai subjectb of llie acquisition of knowledge in which Ihey co-opeiate to solve scieniific issues Key words; "seminar, Analytic chemistry, pH \gin nhan bin 2"^ 5-2013 \gav phan I •n 10 2013 \gii\ Phan bii'n khtui hoc: 'TS Liinh Ihi \go Trudng Dai hoc \o 'lel O'JSf, JsJ'JW, bmail lmiii_-khet> a umail e ng 25 12 201J - / ) / / lhai \g!n ... nhan cua minh Semina biio cao Mgl so sinh vicn dupe chi dinh chuan bi bao cao va nhan xet biio eao Trong qua trinh semina tac gia se trinh bay bao cao, ngudi nhan x(:l phal bicu y kien nhung ngudi... chinh xac ban la [HiO"] tire eae ion hidromum), dugc theo moi tren lit (eon gpi la phan tir gam) Trong cac dung dich loiing (nhu nude sdng hay tir voi nuoc) thi dp hoat dong xap xi bang nong dp... ion H Logid bicu thi logant CO so 10, va pH vi the duoc dmh nghTa la thang logarit cua tinh axit Trong dung dich nude d nhiet va ap suat lieu chuan (STP) giii iri pH bang chi tinh lrung hoa (tire