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Be xu li so bp nude thai tren (lam giam ham lupng cac muoi cua kim loai nang) vdi chi phi thap, ngudi ta sii dung chat nao sau day.. Khli lupng ciia dung dich Y giam so vdi khoi lupng d[r]
(1)SO GIAO DUC VA DAO TAO H A N O I
K I T H I CHQN HOC SINH GIOI LOP CAP THANH PHO CAC MON KHOA HOC TIT NHIEN NAM HOC 2016 - 2017
L DE CHINH THlTC Ngay thi: 28/3/2017 Mon: HOA HOC Then gian lam bai: 45 phut
(De thi gom 04 trang)
* ~ " •• » —
Diem
Giam khao
Bang so Bang chu Ho va ten Chuki
1/ 21
Phach:
Thi sinh lam bai trice tiep vao de thi Can bo coi thi khong giai thich gi them
ong tim klii Cho nguyen tu khoi: H = 1; C = 12; O = 16; Li = 7; N = 14; Na = 23; Mg = 24; K = 39; Ag = 108; Al = 27; S = 32; Ba = 137; Fe = 56; Zn = 65; Mn = 55; CI = 35,5; Ca = 40
Phan I Trac nghiem (10,0 diem)
Thi sinh khoanh tron vao mot lira chon dung cua moi cau (moi cau trd loi dung dugc 1,0 diem) Can Cho phuang trinh hoa hoc:
aFeS04 + bKMn04 + cH2S04 -»dFe2(S04)3 + eMnS04 + fK2S04 + gH20
Trong do: a, b, c, d, e, f, g la cac he so (la bo so nguyen, toi gian) Gia tri cua bieu thuc (a + c) la A B.26 C 18 D 10
Cau Mo hinh thu nhu hinh ben co the ap dung de thu nao sau day ?
A Cl2 B HC1
C.NH3 D 02
mi 6c Cau Nuac thai cong nghiep thudng chua cac kim loai nang nhu thiiy ngan, chi, sat d dang muoi tan Be xu li so bp nude thai tren (lam giam ham lupng cac muoi cua kim loai nang) vdi chi phi thap, ngudi ta sii dung chat nao sau day ?
A NaN03 B.Ca(OH)2 C HN03 D.KOH
Cau Hon hop X glm Na, K va Ba Cho m gam X tac dung het vdi nude duac dung dich Y va 4,48 lit H2 (dktc) B l trung hoa dung dich Y can V ml dung dich hln hop HC1 0,4M va H2S 04 0,3M Gia
tri cua V la
A 100 B 600 C 400 D 200
Cau K M hoan toan m gam hln hap cac oxit FeO, Fe203 va Fe304 bang CO d nhiet dp cao Sau
phan ung thu duac san phlm la C 02 va kim loai Fe Hap thu het luong C 02 bang nude voi
trong (du) dupe a gam ket tua Hoa tan hoan toan lupng Fe tren dung dich HC1 du thu duac V lit H2 (dktc) Moi lien he giua m, V va a la
A m = 2,5V + 0,16a B.m = 5V+l,6a C m= 1,25 V + 0,16a D m = 2,5V + 1,6a
Cau Mpt hop chit X chua ba nguyen t l C, H, O co ti le khli lupng mc: mH: m0 = 21 : : Ti
khli hai cua X so vdi oxi la d, bilt ring < d < 3,5 S i nguyen tu hidro co mpt phan tu X la A B C D 10
Cau Hln hop X gom C2H6, C2H4 va C2H2 Ti khli cua X so vdi hidro la 14,5 B i t chay hoan toan
5,8 gam X r l i hip thu toan bp san phlm chay vao dung dich Ca(OH)2 du, thu duac kit tua va dung
dich Y Khli lupng ciia dung dich Y giam so vdi khoi lupng dung dich Ca(OH)2 ban dau la
A 26,6 gam B 40,0 gam C 13,4 gam D 22,4 gam
Cau Nhiet phan 8,06 gam hln hap X glm KC103 va KMn04, thu dugc 02 va m gam chit rln glm
(2)K2Mn04, Mn02 va KC1 Toan bo lugng 02 tac dung het voi cacbon nong do, thu dugc 1,792 lit hon
hgp Y (dktc) co ti khli so vai H2 la 20 Thanh phln phln tram theo khli lugng cua KMn04
hon hgp X la
C. 16,24% D 39,21% S (bot)
dung dich H,S0*1M A 41,88% B 58,12%
Cau Thuc hien thi nghiem theo sa d l hinh ve ben Hien tugng xay Ing nghiem dung dung dich CuS04 la
A co kit tua tring B co kit tua den
C co kit tua xanh
D dung dich chuyln mau xanh tham
Cau 10 Khi X la nguyen nhan chinh gay hieu ung nha kinh, Y la nguyen nhan chinh gay hien tugng mua axit Hai X , Y lan lugt la
A S 02 va C02 B CH4 va C02 C C 02v a N2 D C 02 va S02
Phan H Bai tra lcri ngan (4,0 diem)
Thi sinh dien ket qua tim dirge vao vuong sau moi cau Cau 1 (2,0 diim)
Cho 0,411 gam hln hop X glm Fe va Al vao 250 ml dung dich AgN03 0,12M Sau cac phan
ung xay hoan toan, thu dugc 3,324 gam chit rln va dung dich muli Y Phan tram khoi lugng cua Al hln hgp X la
Cm (2,0 diim)
Cho 17,70 gam hln hop muoi cacbonat va muoi sunfat cua kim loai kiem X tac dung vira du vdi 150 ml dung dich BaCI2 1M (khli lugng rieng la 1,17 g/ml) Sau phan ting xay hoan toan thu
dugc m gam ket tua va dung dich Y Tinh nlng phan tram chat tan dung dich Y
Phan H I Tur luan (6,0 diim) B a i l (3,0 diim)
Cacnalit la mot muli khoang, phan gom co kali clorua, magie clorua va nude Nung nong 5,55 gam cacnalit thi thu dugc 3,39 gam muli khan Mat khac, lly 5,55 gam cacnalit hoa tan vao nude dugc dung dich X , cho X tac dung vdi dung dich natri hidroxit du, dugc kit tua Y Nhiet phan hoan toan Y thu chat rln Z, khoi lugng cua Z nho han khli lugng cua Y la 0,36 gam Xac dinh cong thtic hoa hoc cua cacnalit
Bai giai:
(3)Bai (3,0 diim)
1 Khi nlu cam blng blp than (blp cui), neu qua lua, com thudng co mui chay khet (cam khe), de giam mui chay khet do, ngudi ta thudng cho vao n l i cam mot mau than go (than hoa) Hay giai thich each lam tren ?
2 Mot hon hop long X glm rucru etylic (C2H5OH), hai ankan A (CnH2ll+.2) va B (CJEWz) vdi
m = n + Cho ^ hon hop X bay hai duac the tich blng thi tich cua 0,84 gam N2 (cung dieu kien nhiet
do, ap suit) Mat khac, dlt chay hoan toan ^ hdn hop X can vita, du 5,544 lit 02 (dktc) thu dugc hon
hgp san pham Y Cho Y hip thu hit vao dung dich Ba(OH)2 du thu dugc 31,126 gam kit tua tach Xac
dinh cong thuc phan tu cua A, B
Bai giai:
(4)