(Cho H=1; N=14; O=16; Na=23; Mg=24; S=32; Al=27; S= 32; Cl=35,5;
K=39; Ca=40; Mn=55; Fe=56; Cu=64; Zn=65; Sn=119; Ba=137)
C TRN 1
Cu 1: (2,0 im)a) Vit 1 phng trnh ha hc chng minh H2S th hin tnh
kh,.b) Nu hin tng, gii thch, vit phng trnh minh ha khi: Dn kh kh
sunfur (SO2) vo dd brom (Br2)Cu 2: (2 im): Vit phng trnh ha hc thc
hin chui sau (ghi r iu kin nu c):
Cu 3: (2 im): Nhn bit cc l mt nhn cha cc dung dch sau: K2SO3,
BaCl2, Na2SO4, H2SO4Cu 4: (3,0 im): Cho 15,15 g hn hp kim loi X gm
km (Zn) v nhm (Al) tc dng hon ton vi dd H2SO4 98% (c, nng) d thu c
10,08 lt kh sunfur (SO2) (ktc) l phm kh duy nht.
a) Tnh % theo khi lng ca mi kim loi trong hn hp X.%Zn = 64,36;
%Al = 35,64
b) Tnh th tch kh SO2(kc) thot ra khi cho hn hp trn tc dng vi
H2SO4 c, ngui. 3,36ltc) Tnh th tch kh (kc) thot ra khi cho hn hp
trn tc dng vi H2SO4 long. 10,08 lt
Cu 5: (1,0 im):Cho 2,1g hn hp Mg v Al (theo t l mol 3:2) tc dng
vi axit H2SO4 c nng, va th thu c 0,025 mol sn phm c lu hunh.Xc nh
sn phm trn l SO2; S hay H2S.H2S
2
Cu 1: (2,0 im)a) Vit 1 phng trnh ha hc chng minh SO2 th hin tnh
kh,.b) Nu hin tng, gii thch, vit phng trnh minh ha khi:
Dn kh kh sunfur (SO2) vo dd axit sunfuhidric (H2S)Cu 2: (2 im):
Vit phng trnh ha hc thc hin chui sau (ghi r iu kin nu c):
Cu 3: (2 im): Nhn bit cc l mt nhn cha cc dung dch sau: K2SO3,
NaCl, NaBr, KOH
Cu 4: (3,0 ) Cho 6,48 g hn hp kim loi X gm bc (Ag) v nhm (Al) tc
dng hon ton vi dd H2SO4 98% (c, nng d) d thu c dd Y v kh 8,96 gam
sunfur (SO2) l phm kh duy nht. a) Tnh % theo khi lng ca mi kim loi
trong hn hp X.
%Ag = 66,67; %Al = 33,33
b) Cn bao nhiu gam FeO? Fe3O4?Fe2O3? tc dng 1/2 lng axit cu a?
5,04 g; 6,496g; 7,47 g
c) Dn ton b lng SO2 sinh ra cu a vo 200ml dd KOH aM. Tm khong gi
tr ca a phn ng to 2 mui? Mut trung ha ? Cu 5: (1,0 im):
Hp th hon ton 15,68 lt SO2 (ktc) vo V lt dd Ca(OH)2 2M thu c 72
gam kt ta. Tm V.
0,325 l
C NGC NGA: N 3
Cu 1: (2 im)
a) Vit 1 phng trnh ha hc chng minh H2S th hin tnh kh (1im)
b) Gii thch hin tng v vit phng trnh ha hc minh ha khi dn kh
SO2vo dd nc Brom (1im)
Cu 2: (2 im)Vit phng trnh ha hc thc hin chui phn ng sau:
S
b) FeS2 SO2 SO3 H2SO4 SO2 Na2SO3 Na2SO4
H2SO4Cu 3: (2 im) Nhn bit cc dung dch mt nhn sau: KI, Ba(OH)2,
BaCl2, K2S,HCl, KBr
Cu 4: (3 im) Cho 9,72gam hn hp gm nhm v bc vo dung dch axit
sunfuric c (d) v un nng th thu c 7,168 lt kh sunfur (ktc) duy nhta.
Tnh % khi lng mi kim loi trong hn hp ban u.
b. Dn kh sinh ra vo 500 ml NaOH 2M (d= 1,04g/ml). Tnh nng mol v
C% ca cc cht trong dung dch sau phn ng ( gi s th tch dung dch thay
i khng ng k) Cu 5: (1,0 im) Ha tan 9,28g hn hp X (Mg, Al, Zn) vi s
mol bng nhau trong mt lng va dung dch H2SO4 c nng, thu c dung dch Y
v 0,07 mol 1 sn phm duy nht cha sn phm ca lu hunh. Xc nh xem sn phm
cha lu hunh l cht no trong s cc cht sau: H2S; S; SO2.
N 4Cu 1: (2 im)
Vit 1 phng trnh ha hc chng minh H2SO4 th hin tnh axit, tnh oxi
ha mn(1im) Gii thch hin tng v vit phng trnh ha hc minh ha khi cho
Axit sunfuric c vo ng saccaroz (1im)Cu 2: (2 im)Vit phng trnh ha hc
thc hin chui phn ng sau:Fe FeS H2S S SO2 SO3 H2SO4 SO2
H2SO4Cu 3: (2 im) Nhn bit cc dung dch mt nhn sau bng phng php ha
hc:
HI, CaCl2, Na2S, Na2CO3, HBr
Cu 4: (3 im) Cho 18,2g hn hp gm Al v Cu tc dng hon ton vi dung
dch H2SO4 c, nng thu c 11,2 lt kh SO2 (ktc). a. Tnh % khi lng mi
kim loi trong hn hp ban u.
b. Tnh th tch kh thot ra (ktc) khi cho 9,1g hn hp trn tc dng vi
dung dch H2SO4 long.
c. Tnh th tch kh thot ra (ktc) khi cho 36,4g hn hp trn tc dng vi
dd H2SO4 c ngui.
Cu 5: (1,0 im) Cho 3,07g hn hp Zn v Fe (theo t l mol 3:2) tc dng
vi axit H2SO4 c nng, va th thu c 0,336l kh (ktc) mt sn phm kh c lu
hunh. Xc nh sn phm kh.
THY LC N S 5Cu 1. (2 im)
a) Vit 1 phng trnh phn ng chng minh: c tnh kh. (2 phng trnh)
b) Nu hin tng v vit phng trnh minh ha: cho axit sunfuric c vo cc
ng saccaro.
Cu 2. (2 im) Hon thnh chui phn ng.
Cu 3. (2 im) Nhn bit cc dung dch sau:
Cu 4. (3 im) Ha tan hon ton 3,68 g hn hp Fe v Cu trong dung dch
H2SO4 c nng d, thu c 1,568 lt SO2 (ktc) l sn phm kh duy nht, v dung
dch X.
a) Tm % khi lng tng kim loi trong hn hp u.
b) trung ha ht lng axit d trong dung dch X th cn 200 ml dung dch
NaOH 2 M. Tm khi lng dung dch H2SO4 90% dng.
c) Dn ton b kh sunfuro trn qua dd cha 3,7g Ca(OH)2. Tm kim loi
kt ta thu c.
Cu 5. (1 im) Ha tan hon ton 13,44 g mt kim loi trong dd H2SO4 c
nng d, thu c 23,04 g SO2. Tm kim loi.
N S 6Cu 1. (2 im)
a) Vit 1 phng trnh phn ng chng minh: c tnh kh. (2 phng trnh)
b) Nu hin tng v vit phng trnh minh ha: dn SO2 qua dd nc
brom.
Cu 2. (2 im) Hon thnh chui phn ng.
Cu 3. (2 im) Nhn bit cc dung dch sau:
Cu 4. (3 im) Ha tan hon ton 24,9 g hn hp Al v Zn trong dung dch
H2SO4 c nng d, thu c 13,44 lt SO2 (ktc) l sn phm kh duy nht, v dung
dch X.
a) Tm % khi lng tng kim loi trong hn hp u.
b) Nu cho 19,92 g hn hp kim loi ban u phn ng vi dd H2SO4 c ngui
d. Bit sn phm kh l H2S. Tm th tch H2S (ktc).
Cu 5. (1 im) Ha tan hon ton 17,55 g mt kim loi trong dd H2SO4 c
nng d, thu c dd X v kh SO2 (sn phm kh duy nht). Bit dd X gim so vi
dd ban u l 44,85 g. Tm kim loi.
THY LC 7Cu 1: (2)
a. Vit PTHH chng minh: (1)
SO2 th hin tnh kh; tnh oxi ha. (Mi tnh cht 1 pt)b. Gii thch hin
tng v vit phng trnh minh ha: (1)
Dn kh H2S vo dung dch CuSO4.
Cu 2: (2 ) Hon thnh chui phn ng sau.
S
b) FeS2 SO2 SO3 H2SO4 SO2 Na2SO3 Na2SO4
H2SO4
Cu 3: (2 ) Nhn bit cc dung dch sau: K2SO4; Na2SO3; Na2S ;BaBr2;
KOH.
Cu 4: (3) Cho 5,1 (g) hn hp Al v Mg tc dng va vi dung dch H2SO4
c nng thu c 5,6 lt kh SO2 (ktc) v dung dch A.
a. Tnh % v khi lng ca Al v Mg.
b. Cho 10,2 (g) hn hp kim loi trn tc dng vi dung dch H2SO4 long
thu c V(lt) H2 (ktc). Tnh V?
Cu 5: (1)
Cho 4,6 (g) hn hp Al v Zn (c t l mol 1 : 1) tc dng va vi dung
dch H2SO4 c thu c 7 lt kh (ktc) ( mt sn phm kh duy nht) v dung dch
A. Tm cng thc ca kh thu c?
8Cu 1: (2)
a. Vit PTHH chng minh: (1)
SO2 th hin tnh kh; tnh oxi ha. (Mi tnh cht 1 pt)b. Gii thch hin
tng v vit phng trnh minh ha: (1)
Dn kh H2S vo dung dch CuSO4.
Cu 2: (2 ) Hon thnh chui phn ng sau.
KMnO4 O2 SO2 SO3 H2SO4 SO2 S Na2S CuS
Cu 3: (2 ) Nhn bit cc dung dch sau: K2SO4; Na2CO3; Na2S ;BaCl2;
HNO3.
Cu 4: (3) Cho 9,1 (g) hn hp Al v Cu tc dng va vi dung dch H2SO4
c nng thu c 16 g kh SO2 (ktc) v dung dch A.
a. Tnh % v khi lng ca Al v Cu.
b. Cho 4,55 (g) hn hp kim loi trn tc dng vi dung dch H2SO4 long
thu c V(lt) H2 (ktc). Tnh V?
Cu 5: (1) Dn 6,72 lt SO2 (ktc) qua 200 ml dung dch Ca(OH)2 1M va
thu c dung dch A. Tnh nng cc cht trong dch A.
THY DNG n 9Cu 1: (2 im)
a) (1 im) Vit 1 phng trnh ha hc chng minh. H2SO4 th hin tnh
axit, tnh oxi ha mnh.
b) (1 im)
Gii thch 1 hin tng v vit phng trnh ha hc minh ha.
Dn kh H2S vo dd CuSO4Cu 2: (2 im) Vit 8 phng trnh ha hc thc hin
chui phn ng S H2SO4
FeS2 SO2 SO3 H2SO4 SO2 Na2SO3 Na2SO4Cu 3: (2 im) Nhn bit cc l mt
nhn cha 4 dung dch HI, HNO3, H2SO4, Na2S.
Cu 4: Cho 9,72gam hn hp gm nhm v bc vo dung dch axit sunfuric c
(d) v un nng th thu c 7,168 lt kh sunfur (ktc) duy nht. a) Tnh thnh
phn % khi lng mi kim loi.b) Thay H2SO4 c, nng bng axit H2SO4 long
Tnh V kh sinh ra.
Cu 5: (1,0 im): Ha tan hon ton 3,54 gam hn hp kim loi gm St v
kim loi R(ha tr II khng i trong hp cht) bng dung dch H2SO4 long thu
c 1,344 lt H2. Mt khc, ha tan hon ton 7,08 gam hn hp trn vo dung
dch H2SO4 c ngui (d) thu c 0.896 lt SO2 duy nht. Tm kim loi R. n
10Cu 1: (2 im)
a) (1 im) Vit 1 phng trnh ha hc chng minh.
H2SO4 th hin tnh axit, tnh oxi ha mnh.
b) (1 im) Gii thch 1 hin tng v vit phng trnh ha hc minh ha. Axit
sunfuric c vo ng saccaroz
Cu 2: (2 im)Vit 8 phng trnh ha hc thc hin chui phn ng
KMnO4 O2 SO2 SO3 H2SO4 SO2 S Na2S PbS
Cu 3: (2 im)Nhn bit cc l mt nhn cha cc dung dch Ba(OH)2, KOH,
KNO3, K2SO4, K2SO3.Cu 4: (3) a) (2,0 im) Ha tan 23,2 gam hn hp Fe v
Cu vo dung dch H2SO4 c v un nng (d) th thu c 12,32 lit kh sunfur
duy nht (ktc). Tnh % khi lng mi kim loi trong hn hpb) (1,0) Thay
H2SO4 c, nng bng c ngui Tnh V kh sinh ra.Cu 5: (1,0 im): t nng 11,2
gam Fe ngoi khng kh mt thi gian thu c 15,04g hn hp X gm Fe, FeO,
Fe2O3, Fe3O4. Cho ton b dung dch X tc dng vi H2SO4 c nng thu c V lt
(ktc)kh SO2 (sn phm kh duy nht). Tnh V.CHC CC EM THI TT !!!7
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