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***** nhom NIT *****Dng I : Hiu sut phn ng

Cu 1: Mt hn hp A gm hai kh N2 v H2 theo t l mol 1 : 3 cho chng phn ng vi nhauto NH3 .Sau phn ng thu c hn hp kh B . T khi hi ca A i vi B l 0,6 .Tnh hiusut phn ng tng hp NH3 .Cu 2: Cho mt bnh kn dung tch 112 lt cha N2 v H2 theo t l th tch 1:4 0

oC v 200 at (

xc tc thch hp ) nung nng bnh mt thi gian sau a v nhit Oo

C thy p sut trongbnh gim 10% so vi p sut ban u .a) Tnh H % phn ng .b) Nu ly 12,5% lng NH3 to thnh iu ch c bao nhiu lt dung dch NH 3 25% ( d=

0,907 g/ml ) .Cu 3: un nng hn hp gm 200 gam NH4Cl v 200 gam CaO .T lng kh NH3 to ra iuch c 224 ml dung dch NH3 30% ( d= 0,829 g/ml ) . Tnh H% phn ng un nng .Cu 4: Nn mt hn hp gm 4 lit N2 v 14 lit H2 trong bnh phn ng ( t

o >400 oC v xc tcthch hp ) .Sau phn ng thu c 16,4 lit hn hp kh ( cng k to v p ) . Tm H% .Cu 5 : T 112 lit N2 v 392 lit H2 to ra c 34 gam NH3 .Tnh H % phn ng ( V o ktc )Cu 6 : Cn ly bao nhiu lit N2 v H2 to ra c 201,6 lit NH3 .Bit H% =18% ( V o ktc) .Cu 7: Lng NH3 tng hp c t 28 m

3 hn hp N2 v H2 (ktc) c t l th tch l 1: 4 ,

em iu ch dung dch NH3 20% , d= 0,925 kg/l . Tnh th tch dung dch NH3 thu c.Bit H%=96% .Cu 8: Trong mt bnh kn cha 90mol N2 v 310 mol H2 , lc u c p sut bng p=200 atm .Nhit gi cho khng i n khi phn ng t n trng thi cn bng . Tnh p sut cahn hp kh khi . Bit H%=20% .Cu 9: Hn hp kh N2 v H2 c t l th tch l 1:4 c nn ti p sut 252,56 atm v dn vobnh phn ng c dung tch 20 lit, nhit trong bnh l 497 oC c gi khng i trong qutrnh phn ng .a)Tnh nH2 v nN2 ban u. b)Tnh s mol mi kh khi phn ng t ti trngthi cn bng bit H%=25% .c)Tnh p sut ca hn hp kh khi .Cu 10 : Mt hn hp kh gm N2 v H2 c t khi i vi H2 bng 3,6 .Sau khi un nng mtthi gian h t ti trng thi cn bng th t khi ca hn hp sau phn ng i vi H

2.bng

4,5a)Xc nh %V hn hp trc v sau phn ng . b) Tnh H% .

Dng II : Xc nh thnh phn hn hp kh v p sutCu 1 : Mt bnh kn dung tch 14 lit cha 14gam Nit Oo C . Tnh p .Cu 2: Trn 50 lit hn hp kh gm NO v N2 c t l s mol l 1:1 vi 50 lit khng kh .Tnhth tch kh NO2 to ra . (cc th tch kh o cng k )Cu 3: Trn ln 60ml NH3 v 60ml O2 ri cho i qua ng ng cht xc tc Pt ( nhit cao).Hn hp kh i ra c lm ngui ,hi nc ngng t . Tnh %V mi kh trong hn hp cn liCu 4: Thc hin phn ng vi 17,92 lit NH3 v 120 gam CuO . a)Tnh th tch N2 .(ktc)

b)Tnh th tch dd H2SO4 ,n c C%=55% v d=1,427 g/ml lm tan ht c.rn thuc sau p.Cu 5: Dung dch NH3 25% c d= 0,91 g/ml . a)Trong 100ml dung dch c ha tan bao nhiu

lit NH3 (ktc) .b)Tnh th tch dung dch NH3 lm kt ta ht cation Al 3+ c trong 100ml dung dch Al2(SO4 )3 1,115 M .Cu 6: Dn 8,96 l NH3 (ktc) cho tan vo 0,2 l dung dch H2SO4 1,5M .Tnh nng cc muitrong dd thu c .Cu 8 :iu ch axit nitric t nguyn liu chnh l N2.Ngi ta phi dng ht 168 ml N2(ktc )vi H= 80% . Tnh m dd HNO3 50,4% thu c .Cu 9: un nng 127 gam hh 2 mui (NH4)CO3 v NH4HCO3, hn hp phn hy ht thnh khv hi nc. Lm ngui sn phm n 27oC thu c 86,1 l hh kh, di p sut 1atm .Tnh t ls mol hai mui trong hn hp .

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Cu 10 : Hn hp kh N2 v H2 c t khi vi H2 bng 4,25 .Tnh %V mi kh trong hn hp .Cu 11 : A v B l hai oxit ca Nit c cng %N = 30,45% . Bit A c t khi so vi O 2 bng1,4375 . B to thnh t hai phn t A ha hp vi nhau . Xc nh CTPT ca A v B .Cu 12 : Mt bnh kn cha 4mol N2 v 16mol H2 c p sut l 400atm khi t trng thi cnbng th N2 tham gia phn ng l 25% Cho nhit bnh gi khng i.a)Tnh s mol kh sauphn ng .b) Tnh p sut hh kh sau p .

Cu 13 :Mt hn hp kh gm NO v NxOy c M = 36,4 v d NO / NxOy = 15 / 23 .Tnh %Vmi kh .Cu 14:Mt hn hp kh X gm 3 oxit ca N2: NO; NO2, NxOybit %VNO=45%,%VNO2 =15%

, % mNO =23,6% . Xc nh cng thc NxOy .Cu 15: Nhit phn hon ton mt mui amoni ca axit cacbonic sau dn ton b sn phmvo 50gam dung dch H2 SO4 19,6% th to mt nui trung ha c nng 23,913% .Tmcng thc v khi lng mui ban uCu 16 : cho dung dch NH4 NO3 tc dng va vi dung dch hidroxit ca mt kim loi hatr hai th thu c 4,48 lit kh (ktc) v khi c cn dung dch sau phn ng thu c 26,1 gammui khan . Xc nh kim loi ha tri II .Cu 17: Hn hp X gm CO2 v mt oxit ca Nit c t khi hi i vi H2 bng 18,5 . Oxit canit c cng thc phn t l : A .NO B.NO2 C. N2O3 D. N2O5Cu 18: Hn hp X gm hai oxit ca nit l Y v Z ( vi t l V Y :VZ = 1 : 3 ) c t khi hi

i vi H2 bng 20,25 . Y v Z c cng thc phn t l : A.NO; N2O3 B.NO ; N2O C.N2O; N 2O5 D .Khc

*****AXIT NITRIC ( HNO3 ) *****

Cu 1:* Ha tan 4,59 gam Al bng dung dch HNO3 thu c hn hp kh NO v N2O .Hnhp kh ny c t khi so vi H2 bng 16,75 . Tnh th tch mi kh .Cu 2: * cho 11 gam hn hp Al v Fe vo dung dch HNO3 long ,d th c 6,72 lit (ktc) khNO bay ra tnh khi lng mi kim loi trong hn hp .Cu 3:* Mt lng 13,5 gam Al tc dng va vi 2,2 lit dung dch HNO3 cho bay ra mt hnhp kh NO v N2O .T khi ca hn hp kh so vi H2 bng 19,2 .a)Tnh s mol mi kh to ra .b)Tnh nng ca axit u.Cu 4: *Mt lng 8,32 gam Cu tc dng va vi 240ml dung dch HNO 3 cho 4,928 lit(ktc) hn hp gm hai kh NO v NO

2bay ra . a)Tnh s mol mi kh to ra

b)Tnh nng ca dung dch axit u .Cu 5: *Ha tan ht 4,431 gam hn hp Al v Mg trong HNO 3 long thu c dung dch A v1,568 lit (ktc) hn hp hai kh u khng mu c khi lng 2,59 gam trong c mt kh hanu trong khng kh .

a. Tnh % m mi kim loi trong hn hp . b. Tnh s mol HNO3 phn ng .Cu 6:* Ha tan 62,1 g kim loi M trong dd HNO3 long c 16,8 l hh khX (ktc) gm hai kh0 mu khng ha nu ngoi khng kh ; t khi ca hn hp so vi H2 bng 17,2 . a.Xcnh cng thc phn t mui to thnh .b.Nu s dng dung dch HNO3 2M th th tch dng l bao nhiu , bit rng ly d 25% sovi lng cn thit .Cu 7:* Nu cho 9,6 gam Cu tc dng vi 180ml dung dch HNO3 1M thuc V1 lit kh NO v dung dch A .Nu cho 9,6 gam Cu tc dng vi 180ml dung dch hn hp gm HNO3 1M v H2 SO4 0,5M th

thu c V2 lit kh NO v dung dch B . Tnh V1 / V2Cu 8: *chia hn hp Cu v Al lm hai phn bng nhau :

Mt phn cho vo dung dch HNO3 c ngui th c 8,96lit kh mu nu bay ra .

Mt phn cho vo dung dch HCl th c 6,72 lit kh H2 bay ra . Xc nh %m mi kim loi

trong hn hp .

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Cu 22 : * Ha tan 1,35 gam kim loi R bng dung dch HNO3 long d thu c 2,24 lit kh NO

v NO2 (ktc) c t khi so vi H2 bng 21 . a)Tm M b)Tnh s mol HNO3 phn

ng

Cu 23: * Ha tan hon ton 1,35 gam mt kim loi R trong 1,5 lit dung dch HNO3 0,15M thu

c 0,448 lit kh NO (ktc) . a)Xc nh kim loi R . b) Tnh s mol HNO3 phn ng .Cu 24:* Mt oxit kim loi c cng thc MxOy trong %M =72,41 % v khi lng . Kh

hon ton oxit ny bng kh CO thu c 16,8 gam kim loi M . Ha tan hon ton kng M

bng HNO3 c nng thu c mui ca M v 0,9 mol kh NO2 . Xc

nh oxit kim loi .

Cu 25: * Cho 3,6 gam mt oxit ca kim loi M phn ng v vi HNO3 c nng thu c

mui ca kim loi M ha tr III v 1,12 lit kh (ktc ) . Xc nh oxit ca kim loi

M .

Cu 26: * Ha tan hon ton 0,368 gam hn hp Al v Zn cn 25 lit dung dch HNO3 0,001 M

th va . Sau phn ng thu c mt dung dch gm ba mui . Tnh nng ca dung dchsau phn ng .

Cu 27 : *Cho 6,2 gam Cu tan hon ton vo 200ml dung dch HNO3 th gii phng mt hn hp

kh gm NO v NO2 c t khi so vi H2 bng 18 . Tnh nng ca dung dch HNO3 .*****AXIT NITRIC ( HNO3 ) *****

TRONG TUYN SINH I HC V LUYN THI TT NGHIPCu 1: * Ha tan 4,97 gam hn hp Al, Cu , Fe trong dung dch HNO3 long d thu c 1,792litkh NO (ktc) . Tng khi lng mui khan to thnh : A. 19,85 g B .26,5 g C.39,7 gD. 40,2 gCu 2: * Ha tan hn hp gm FeS v FeCO3 bng dung dch HNO3 long th thu c hn hp

X gm hai cht kh . T khi ca X so vi O 2 l 1,375 . Hn hp X gm: A. CO2 ; NO B. CO;N2 C. CO2 ; N2O D. NO ; N2OCu 3: * Ha tan hon ton 8,64gam FeO bng dung dch HNO3 th thu c 336ml kh duy nht(ktc) . cng thc ca cht kh l : A. N2 B. NH3 C.N2OD.NO2Cu 4:* Oxi ha 11,2 gam Fe bng oxi trong khng kh c 14,4 gam hn hp rn gm cc oxitst (hn hp A).. Ha tan hon ton A trong HNO3 long thu c V lit kh NO (ktc) . V c gitr bao nhiu :

A.0,48 lit B.0,672 lit C. 0,56 lit D.0,896 litCu 5: * oxi ha hon ton 10,92 gam bt st thu c 15,24gam hn hp A gm cc oxit st.Ha tan cc oxit bng dung dch HNO3 long d thu c kh NO duy nht. Th tch NO l:A.0,224lit B.0,448lit C.0,672 lit D.0,336 litCu 6: * Oxi ha hon ton 8,96 g bt st thu c 10,88 g hh A gm cc oxit st .Ha tan A

bng dd HNO3long d thu c kh NO duy nht . Th tch NO (ktc) thu c l : A.0,224 lB. 1,792 l C.0,672 l D. 0,336 lCu 7:* Cho 0,96 gam Cu vo 100ml dung dch cha ng thi KNO3 0,08M v H2SO4 0,2Msinh ra V (lit ) mt cht kh c t khi so vi H 2 l 15 v dung dch A . V c gi tr l : A. 0,1702 lB. 0,3584 l C. 0,448 lit D. 0,336 litCu 8:* Oxi ha chm m gam Fe ngoi khng kh thu c 12 gam hn hp X gm : FeO,Fe2O3 , Fe3O4 , Fe d .Ha tan X va bi 200ml dung dch HNO3 thu c 2,24 lit kh NO( ktc ) . Tnh m gam v nng HNO3 :A.10,08 g ; 0,2M B. 1,008g ; 0,2M C. 10,08g ; 2M D. Khac..........

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Cu 9: * Khi ha tan 2,7g Al vo dung dch HNO 3 d , ch thu c dung dch mui cha mtcht tan hn hp kh N2O + N2 . Bit nN2O : nN2 = 1 :2 . Th tch hn hp kh ( ktc ) l : A .0,27 lit B. 0,72 lit C. 2,7 lit D. 7 litCu 10 :* Cho 16g FeS2 tc dng vi dd HNO3 2,5M c kh NO duy nht v mui sunfat st.Bit rng qung pirit c 75% nguyn cht ,cn li l tp cht .Hiu sut ca phn ng HNO 3 l80%. Th tch HNO3 phi dng l :

A. 0.50 lit B. 0,375 lit C. 0,425 lit D. 0,26 litCu 11: * Ha tan 4,5g Al bng dung dch HNO3 long c V1 lit kh NO v V2 lit kh N2O .Hn hp kh c t khi so vi H2 bng 16,7 . Tnh gi tr V1; V2 tng ng l: A. 2,24;1,12 B.1,98; 0,66 C. 1,12; 1,12 D. 2,2; 0,88Cu 12: * Ha tan hon ton hh gm 0,12mol FeS2 v x mol Cu2S bng dd HNO3 va , thuc dd A ch cha mui sunfat v 268,8 lit NO (ktc) . x c gi tr : A. 1,8 mol B. 1,08 mol C.0,18 mol D. OTHERCu 13: * Ha tan hon ton 3,84gam Cu vo dung dch HNO3 long thu c mt cht khkhng mu (A) , em oxi ha hon ton kh A to thnh mt cht kh B c mu nu , sc kh Bvo nc cng vi dng kh oxi chuyn ht thnh HNO3 . Th tch oxi tham gia phn ng :A.2,24 lit B.0,224 lit C.4,48 lit D. 0,448 lit

Cu 14: *Cho 200 ml gm HNO3 0,5M v H2SO4 0,25M tc dng vi Cu d c V lit NO (ktc) c cn dung dch sau phn ng c m gam mui khan . V v m c gi tr ln lt l :

A.2,24; 12,7 B.1,12 ; 10,8 C.1,12 ; 12,4 D.1,12 ; 12,7Cu 15: * Ha tan 2,8 gam mt kim loi X vo dung dch HNO 3 , thu c 1,12 lit kh NO duynht (ktc) . X l :A.Mg B.Fe C.Al D. CuCu 16:* Ha tan m gam Al trong HNO3 long thu c hn hp gm 0,03 mol N2 v 0,1 molNO. m =A. 6,48 B. 5,4 C. 6,72 D. 7,02Cu 17: * (1) FeO ; (2) Fe3O4 ; (3) Fe2O3 ; (4) MgO ; (5) Al2O3 ; (6) Al2S3 ; (7) FeSO4. Chtno phn ng vi HNO3 c nng gii phng ra kh : A.(6). B. (1), (2), (5), (6).C. (1) , (2). D. (1), (2), (6), (7)Cu 18: * Ha tan 7,2 gam kim loi X thuc phn nhm chnh trong dung dch HNO3 sinh ra khNO v trong dung dch HCl thy lng mui clorua v mui nitrat hn km nhau 15,9 gam . Xl : A. Mg B. Fe C. Ni D. AlCu 19: * Ha tan hon ton hn hp Al, Fe vo dung dch HNO3 long ,d n phn ng honton thu c dung dch Y v hn hp kh X thot ra (ktc) gm NO ; N 2O vi khi lng 10,4gam v th tch l 6,72 lit .Tng s mol electron m hn hp Al , Fe nhng l : A. 1,6B. 1,26 C. 1,4 D. 1,3Cu 20: Cho 0,01 mol Fe v 0,015 mol Cu vo dd cha 0,06 mol AgNO3 th thu dc m1 ktta v dd A. cho HCl d vo dd A ri cho tip Cu vo n khi cc phn ng xy ra hanton th thy tiu ph m2(g) Cu .gi tr_ ca m1 v m2 l:(bit p to kh NO) A. m1 =4,32g ;m2 = 5,76g B. m1 = 4,32g ; m2 = 6,4g

C. m1 = 6,48g ;m2 = 5,76g D. m1 = 6,48g ; m2= 6,72gCu 21: Cho 16g Fe2O3 tc dng vi m g Al thu dc hon hp cht ran A , cho A tc dng viHCl du thu dc 7,84 lit kh H2 ( cc p xay ra han ton ). Gi tri ca m l:

A. 5,4 g B. 2,7 g C. 9,54 g D. 8,1 g