PHONG GD&DT PHU HOA DE cHiNH THUC KI THI CHQN HQC SINH GIOI cAp HUY:¢N LOP 9 THCS N.AM HQC 2009-2010. MON THI: HOA HQC THe)] GIAN: 150 PHUT (kh6ng kd thai gian phat ai) _C_ii_u_l. (3,0 di~m) Vi~t phuO'ng trinh phan tmg hoa hQc theo sO'd6 chuy~n hoa sau (m6i mlii ten chi vi~t 01 phuO'ng trinh; ghi ro di~u ki~n - n~u co): FeS ~r !3J ~H2S Hr va ten thi sinh: sf; BD: . _C_iiu 2. (4,5 di~m) 1. Cac d\mg Cl,ldn thi~t s~n co, chi duQ'c dung them thu6c thu duy nhftt 1£1 fhO, hay nh~n bi~t cac lQ rieng bi~t dlJng cac hoa chftt r~n (d~ng bQt) sau: Na 2 0, CaO, Ah03, AI, MgO, P20S. 2. Dua mQt dai (bang) magie dang chay VaGday mQt lQ chua dAykhi C02, magie v~n ti~p t\ICchay, day lQxuftt hi~n bQt mau tr~ng l~n v6i bQt mau den, do 1£1 nhfi'ng chftt gi? T~i saG magie chay duQ'ctrong khi CO 2 ? Vi~t phuO'ng trinh phan tmg hoa hQc xay ra? __C_iiu 3. (4,0 di~m) 1. a 30°C, hoa tan kalinitrat VaGnu6c nguyen chftt thu duQ'c 950gam dung dich A co n6ng dQ b~ng 49%. Lam l~nh dung dich A tu 30°C xu6ng con 20°C, thfty kh6i lUQ'llgkalinitrat (kh6ng ng~m nu6c) tach ra khoi dung dich 1£1 a gam. Tinh a (gam), bi~t dQ tan cua kalinitrat trong dung m6i mr6c 620°C b~ng 32gam. 2. Cho 24,8gam h6n hQ'PX g6m mQt kim lo~i R (nhom IIA) va oxit cua no tac dl,lng h~t v6i dung dich HCl du thu duQ'c55,5gam mu6i khan. Xac dinh kim 10~i R? _C_iiu 4. (2,5 di~m) Cho 4,6gam Na VaG95,6ml H20 (d = 1,0gamlml), sau khi phan ung xay ra hoan toan t11UduQ'c a gam dung dich A. Lfty _3;_gam dung dich A cho tac dl,lng v6i 30gam dung dich CUS04 18%, phan ung k~t thuc thu duQ'ck~t tua B va dung dich C. Tinh n6ng dQpheln tram cac chftt co trong dung dich A, C. _~_ii_u_5. (3,0 di~m) Nung nong 18,56gam h6n hQ'p A g6m FeC0 3 va mQt oxit s~t F~xO¥ trong kh6ng khi d~n khi d,c phc'mlrng xay ra hoan toan, thu duQ'c V lit khi CO 2 va 16gam mQt chat ran (chi chua mQt oxit duy nhat Cllas~t). Cho V lit khi C02 hftp thl,lh~t VaG400ml dung dich Ba(OH)2 0, 15M thu duQ'c7,88gam k~t tua. Xac dinh c6ng thuc phan tu cua ox it s~t FexO y . _C_iiu 6. (3,0 di~m) Lfty mQth6n hQ'PbQt X g6m Al va Fe203 dem thlJc hi~n phc'mung nhi~t nh6m trong di€u ki~n kh6ng co kh6ng khi. Lfty h6n hQ'pr~n sau phan ling dem nghi€n nho, trQn d€u r6i chia lam hai phAn. - Cho pheln mQt (Xl) tac dl,lng v6i dung dich NaOH du, thu duQ'c 8,96lit H 2 va con l~i phAn kh6ng tan co kh6i lUQ'ngb&ng44,8% kh6i IUQ'ngcua phAn mQt. - Dem phelnhai (X 2 ) h.oa tan h~t trong dung dich HCI du, thu duQ'c26,88lit khi. Cac th~ tich khid€u do 6 di€uki~n tieu chufin, cac phc'mung d€u xay ra hoan toano a. Tinh kh6i IUQ'ng(gam) m6i pheln. b. Tinh kh6i lUQ'ngtung chftt trong h6n hQ'P X ban delu. H~T LlfU y: H9C sinh aU(Jcphep sir dl;mg Bang tudn hoem va may tinh cdm tay (theo danh m{lc may tinh B6 GD&DT cho phep sir dWlg trong cac ki thi qu6c gia). HQ, ten Giam tii! ]: , ; Chu' ky: HQ, ten Giam thi 2: ; Chu' ky: . . PHONG GD&DT PHU HOA DE cHiNH THUC KI THI CHQN HQC SINH GIOI cAp HUY:¢N LOP 9 THCS N.AM HQC 20 09- 2010. MON THI: HOA HQC THe)] GIAN: 150 PHUT (kh6ng kd thai gian phat ai) _C_ii_u_l. (3,0. phuO'ng trinh; ghi ro di~u ki~n - n~u co): FeS ~r !3J ~H2S Hr va ten thi sinh: sf; BD: . _C_iiu 2. (4,5 di~m) 1. Cac dmg Cl,ldn thi~ t s~n co, chi duQ'c dung them thu6c thu duy nhftt 1£1 fhO,. hQ'P X ban delu. H~T LlfU y: H9C sinh aU(Jcphep sir dl;mg Bang tudn hoem va may tinh cdm tay (theo danh m{lc may tinh B6 GD&DT cho phep sir dWlg trong cac ki thi qu6c gia). HQ, ten Giam tii!