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(1)BE THI CHiNH THUC
KYTHI CHQN HQC SINH GIOI cAp IIUYlN
TRUNG HQC coSO,NAM HQC 2018 2019 Mon: H6AHQC
Thai gian: 150 phut (khong ki thaigiangiao aJ)
Ngay thi: 19/02/2019
soGIAo DVC vA BAo T~o TIENGIANG
(DJ thico02trang,g6m 05 hili toan)
Cho bi~t nguyenm khai ciia cac nguyen tanhu sau: H=1; N =14;0 =16;Na =23; Mg=24;Al
=27;P=31; S=32;CI=35,5; K=39;Ca=40;Fe=56;Cu=64;Zn=65;Ba=137;Ph=207
Bid 1: (5,0 c1i@m)
1.1 Hay lua chon mot c~p chAtthich hop d€ di8u ch~ tnrc ti~pcac chAtsau: a) Nhom oxit
b) S~t(lII) clorua
e) Khi S02 trongphong thi nghiem d) Dungdich NaOH cong nghiep
Vi~t phuong trinh hoa hoc cua cac phan img xay ra, ghi ro di8uki~n phan irng (n~u co)
1.2 Cho daycac chdt gbm:Na, Cu, S03,S02, Ah03 vaFe203'
a) Trong day cac chAttren, hay chon cac chAtco tinh chAthoa hoc sau:
- Tac dungvoi mroc anhiet dQthuong
- Tac dung voi dung dich H2S04 d~e nong tao dungdich co mau xanh -Tac dung voi dung dichHe!tao dung dich co mau vang nau,
-DAyduoc bac kh6i dung dich AgN03•
b) Viet phuong trinh hoa hQcella cac phan (mg xay raacau a)
1.3 Hydro sunfua la chAtkhi adi8u ki~n thu<mg,khong mau, mui trtmg th6i, co (Jkhi gas,
b6e ratilxac dQngth\fe v~t 0nbng de>thich hqp, H2S gay ngQ dQc,chong m~t, nhuc
dAu,th~ chi co th~ ch~t n~u tha lau H2S D~ danh gia dQnhiem bdn hydro sunfua khong CllamQtnha may, nguOitati~nhanh thi nghi~m sau:
"Lay 1,4lit khong (tJktc) r6i ddn qua dung dich chi nitrat du thi thu tJU{1c0,239 mg chi(II) sunfua".
a) Hay neu,hi~ntuqn~ va phuong trinh hoa hQeCllaphan fulgxay raathi nghi~mtren b) Tinh phan tram the tich H2S 1,4 lit khong khitren
e) Hay xet xem S\fnhiem bAnhydro sunfua khong anha may tren co vuqt muc cho phep khong? N~u ham luqng cho phep la 0,01 mg/L khong
d) MQthQcsinh phat hi~n co th€ xu ly luqng H2S nhiem bAntrong dung dich bing caeh th6i
lien we oxi vao dung dieh Hay vi~t phmmg trinh hoa hQcclla phan (mg xay va eho biet hi~n tuqng clla phan (mg
Bii 2: (5,0 c1i@m)
2.1 Co4 dung dich: AICh, K2C03, Ba(HC03)2 va MgS04 du<),cki hi~u ngiu nhien lit X, Y,
Z va T K~t qua thi nghi~m CllaX, Y, Z va T vOi cac thu6c thu duqc ghi (Jbang sau (" -":
khOngxay ra phim u-ng;"t ": tt;lOchdt khi; ",J," :tt;lOchdt kit tua):
~at . x Y Z T
Dung dich NaOH ,J,keo trfulg, ,J, trfulg ,J, tr~g
rbi ,J,tan
-Dung dich H2S04 loang - t,,J, tr~ng - t
a) Xac dinh cac chAtx,Y,Z va T
b) Vi~t phuong trinh hoa hQcella cae phan (mgxayra cac thi nghi~m tren
(2)• J 1: ' ...
. "
2.2Hinh ve sau mo illthi nghiem di€u che vAth~ tinh chAt cua Z phong thi nghiem:
Dulll d!ChexitV
QuVtlmkha
H,so.(cqcj
a) Biet r[mg:X co kh6i hrong mol la 158 gam va dung dich X co mau tim; Z la don chAt mau vang luc, duoc tao illchAt ran X va axit Y~Xac dinh cac chAtx, Y, Z va viet
phirong trinh hoa hoc cua phan irng di€u che Z
b) Khi Z thu duoc ah~ thong tr.enco tinh khiet khong? Giai thich
e) Neu va giai thich hien nrong cua giAy quy tim khoa K dong va khoa K rna? Viet phirong trinh hoa hoc cua phan img xay (neu co)
Bai 3: (3,5 di~m) ' _~
3.1Nguyen tir cua nguyen t6 R-co t&ng sf)-h;;ttproton, notron va electron la 46 Trong hat nhan, s6hat khong mang di~n nhieu hon s6 hat mang di~n tich la
a) Xac dinh di~n tich h;;ttnhan, nguyen tir kh6i va ten cua nguyen t6 R
b) Biet ring: nguyen tir cua nguyen ,t6Rco lap electron va lap,ngmii cung co 5,electron Xac dinh vi tri (so thir tv0 nguyen to, chu ki,,nhom) cua nguyen to Rtrong bAngtuan hoan 3.~ Cho 12,0~am d6ng(II) o~it tac d~lllgvira, du v6i dung dich axit.sunfuriF 2510 thu duQ'c dung dich A Lam l;;tnhA xuong 20°C cho den CuS04.5H20 tach hoan toan, lQcIcy,
dem can duQ'c m gam tinh th~.Tinh m,biet dQ tan cua CUS04 (120°C la 20,5 gam
Bai 4: (3,0 di~m)
H6n hqp X g6m hai mu6i RHC03 vaR2C03 Chia 7,62 gamX ba ph~ bing nbau:
- Phfut mQt tac d\lng hoan toan vai dung dich HCl du thu duQ'c 0,672 lit (dktc) - Phfut hai tac d\lng hoan toan vai dung dich BaCh du, thu duQ'c 1,97 gam ket ma - Phftn ba tac d\lng t6i da v6i 30 niLdung dichNaOH aM
a) Xac dinh cong thirc hoa hQc cua hai mu6i
b) Tinh phftn phfut tram thea kh6i luqng m6i mU6i X
c) Tinh a
Bai 5: (3,5 di@m) _ ,
Cho m gam h6n hqp X g6m hai kim,lo;;ti Mg, Fe (1d;;tngbQtvito 50,0 gam dung dich CUS04 9,6 %.Sau phan irng thu duQ'c 2,48 gam chAt ran Y chira hai kim lo~i va dung dich Z Them NaOH du vao dung dich Z r6i IQc lAy ket tua; dem nung khong den kh6i luqng khong d&ithu duQ'c2,0 gam chAt ran (biet ring cac phan irng deu xAyfa hoan toan)
a) Hay viet phuong trinh hoa hQc cua cac phAn irng co.th~xAy b) Tinh m va phftn%theo kh6i luqng tirog kim lo;;tico X
c)JCac dinh n6ng dQ phftntram eua cac chAt-tan co dung djch Z
~ 't ~ " *
-~T -- -- - ---- - - - -
-Thi sinh khong tlu(1csii'd{lng taiIi?u va bling tUo'nhoan cac nguyen tn hoa h!'c.
Can b{jcoi thi khong gilii thich gi them.
HQ va ten thi sinh: S6 bao danh: