Cho Mng s&Faraday F = 96500 a Tinh kh6i hrong dung dich giam trong qua trinh di~ phan tren.. b Tinh pH cua dung dich Y khi thoi gian di~ phan dung dich Ia 630 giay..[r]
(1)so GIAO DVC vA DAo T";'O LAo CAl DE THI CHINH THUC CUQC THI cAP TINH GIAI ToAN TREN MAy TiNH CASIO, VINACAL NAMHQC 2012-2013 Mon thi: Hoa hec (Chuong trinb rHPT) Thai gian thi: 150 phut (khong kd thai gian giao dJ thi) Ngay thi: 17/0112013 nJ thi gam co 10 cdu, trang, m6i cdu 05 didm (Chzl y: ThEsinh lam bai thi VaG ban dJ thi nay) ~ DIEM CVA BAI THI Bangstl Giam khao (Ky va ghi ro ho ten) T SOPHACH (Do Truong ban chdm thi ghi) Bang chii' Call 1: Nguyen t6 A co 41o~i d6ng vi voi cac d~c di~m sau: Tang s6 khai cua 41o~i d6ng vi la 825 Tang sa notron cua d6ng vi A3 va At Ion han sa notron cua Alia 121 hat Hieu sa kh6i cua d6ng vi A2 va At nho han hieu s6 kh6i cua hai d6ng vi Al va A3 la dan vi Tang sa hat cua hai d6ng vi Al va At 100 han tang s6 hat khong mang di~n cua d6ng vi A2 va A3 la 333 hat, S6 kh6i cua A4 bang 33,5% tang s6 kh6i cua d6ng vi Xac dinh s6 kh6i cua d6ng vi va sa di~n tich hat nhan cua nguyen til'nguyen t6 A Cach giai K~t qua (2) Cau 2: Ldy 2,5 ml dung dich CH3COOH 4M rbi pha loang vao mroc lit dung dich A a) Hay tinh dQ di¢n Ii a cua CH3COOH va pH cua dung dich A Bi€t clng Iml dung dich A co 6,28.1018 ion va phan tU axit chua phan Ii Cho so Avogadro NA = 6,02.1023• b) Tinh hAng s6 axit K, ella axit axetic each giii K~t qua (3) Can 3: Cho 23,52g han hop kim loai Mg, Fe, Cu VaG 400 ml dung dich HN03 I,7M dung c5c X thay thoat mot nhftt khong mau, hoa nau khong Trong c5c X du mot kim loai chua tan het D6 tiep ill ill dung dich H2S04 0,5M vao c5c X, chftt tren lai bay cho den kim loai vira tan h~t thi mM440ml, thu duoc dung dich A Cho dung dich NaOH d~n du vao 112dung dich A, 19C k~t rna sau rna sach, nung k~t rna khong d~n kh5i hrong khong d6i thu duoc ch~t rfulB nang I5,6g Tinh n6ng dO moll} (CM) cua cac ion dung dich A? (Cho Mg=24; Fe= 56; Cu = 64; S=32; H=l; 0=16) Cach_ghii K~tqua , (4) Can 4: Ddt chay 3,2 gam sunfua kim 10~iM2S (M cac hop chAt co s6 oxi hoa +1 va +2) oxi duo San phfun r~n thu duoc dem hoa tan h~t mQt hrong vira dil dung dich H2S04 39,2% nhan duoc dung diIC h muoi; ,; 1600 OJ: n l'am lanh d'ung diIC h muoi;'., thAay tac , h co nong d9 33 zo vern 25, gam A • ,:{ ., ~ 1'\ : , 4800 ., tinh the, nong muoi lai la -% 107 , TIll A , A A., cong thuc tinh the muoi tach (Cho S=32; Cu=64; Fe=56; Zn=65; Ag =108; Na =23; K=39) Ca~h giai Ketqua , Call 5: Co dung dich x g6m F~(804)3 O,lOOM; FeS04 0,01OM va NaCI2M Di~n phan 100 ml dung dich X voi cuong dQ dong di~n mQt chieu khong d6i co 1= 9,650A voi di~ cue tro (co mang ngan) va thoi gian 100 giay, thu duoc dung dich Y Cho Mng s&Faraday F = 96500 a) Tinh kh6i hrong dung dich giam qua trinh di~ phan tren b) Tinh pH cua dung dich Y thoi gian di~ phan dung dich Ia 630 giay (Coi th~ tich dung dich thay d6i khong dang k~ sau di~n phan va 8=32; Fe=56; Na =23; Cl=35,5) (5) Cach giai K~t qua can Amoni hydrosunfua la mot hQ'Pehdt khong b~n; dS dang phan huy NH3(k) va HZS(k): NRtHS(r) - NH3(k) + H2S(k) Cho bi~t cac s61i~u nhiet dc)ng hoc sau day tai 25°C: I-f(kJ.mor1) S°(J.K-1.mor1) NH4HS(r) -156,9 113,4 NH3(k) -45,9 192,6 HZS(k) -20,4 205,6 a) Tinh ~Ho, L).So,L).Gotai 25°C cua phan trng tren (theo Jzmol hoac J/mol.K) b) Hay tinh hfug s6 din bfug K, tai 25°C cua phan irng tren (khong d.n ghi dan vi), c) Hay tinh hang s6 can bang K, tai 35°C cua phan irng tren gill.thiet r~g ca & va ~so khong phu thuoc nhiet dc) d) Hay tinh ap sudt tom phan binh chua n~u phan irng phan huy dat can bang tai 2SoC B6 qua th~ tich cua NRJIS(r) Bi~t T = 273 + tOC;R = 8,314 J/mol.K K~tqua Cach giai (6) ·can 7: Ch§t htru co X chi chua (C, H, 0) D6t chay hoan toan gam X r6i cho san pham chay hap thu h~t 100mI dung dich NaOH 20% (d=I,2g/mI) thi sau phan irng thay n6ng d9 NaOH dung dich chi 14,125% d6ng thai khei hrong binh NaOH tang them 4,6 gam Xac dinh cong thirc phan tu cua X, bi6t Mx <290 each K~t qua giai (7) Call 8: MQt h6n hop kill X g6m mQt ankan, anken va mQt ankin c6 th~ tich 1,792 (lit) dktc, duoc chia lam phftn bing Ph§n 1: cho lQi cham qua dung dich AgNOiNH3 du thi thfiy th~ tich han hop giam di 12,5% va c6 0,735 gam k~t tua Ph§n 2: dem d6t chay hoan tom r6i cho san pham IQi qua 9,2 lit dung dich Ca(OH)2 0,0125M thi thfiy 11 gam kSt tua, L9C bo k~t rna, dun n6ng dung dich thu duoc lai thfiy xufit hien k~t rna Xac dinh cong thirc phan nr cua cac hidrocacbon bi~t ankan va anken c6 cling s6 nguyen ill cacbon t rong PJh~ an tu Ket qua each ghii , , (8) Can 9: H6n hop A g6m eh§.t hiru co mach ho chua cung m9t loai nhom chirc hoa hoc Khi dun nang 47,2g h6n hop A voi hrongdir dung dich NaOH thi thu diroc m9t nrou dan clnrc va 38,2 g h6n hop muM cua hai axit htru co dan chirc, k~ ti~p day d6ng d~ng Mat khac n~u d6t chay h~t 9,44g A c~n vira du 12,096 lit O2, thu diroc 10,304 lit CO2, Cac th8 tich dktc Xac dinh CTPT , VIe '~t CTCT' eua cae ch~t a co'tr ong A a r each giAi Ket qua , (9) Ciu 10: mang co sa hi dan vi cau true nho nhat duoc l~p lai cau true tinh th8 Phuong phap nhi€u xa tia X cho bi~t rang mang co sa cua tinh th8 vang co cau true l~p plurong tam dien (nrc Ia tam cua m6i nguyen nr n~m a cac dinh cua hinh l~p phirong va tam di~m cua m6i mat) Canh cua mang bang 0,408 nm Thill xem m6i mang co sa chua bao nhieu nguyen ill Kh6i hrong rieng cua vang la 1,93.104 kg.m", Hay tinh the tich va khoi hrong cua m~g l~p phuong co sa (theo gam) Tinh kh6i hrong cua m9t ngui'en ill vang (theo gam) va s6 Avogadro Cho nguyen ill kh6i cua yang la 196,97 ; lu= 1,6605.10-2 kg K~t qua Cach_giii -H~t- (10)