2. Kim tra bi c Hon thnh cc s sau: a) Fe + H2SO4 (c) SO2 + b)
Fe + HNO3 (c) NO2 + c) Fe + HNO3 (long) NO + d) FeS + HNO3 NO +
Fe2(SO4)3 +
3. p n a) 2Fe + 6H2SO4 (c) Fe2(SO4)3 + 3SO2 + 6H2O b) Fe +
6HNO3 Fe(NO3)3 + 3NO2 + 3H2O c) Fe + 4HNO3 Fe(NO3)3 + NO + 2H2O d)
FeS + HNO3 Fe2(SO4)3 + NO + Fe(NO3)3 + H2O
4. 4
5. TNG QUAN BI HC I. V TR VA CAU HNH ELECTRON II. TNH CHAT VAT
L III. TNH CHAT HOA HOC IV. HP CHAT CUA CROM CROM 5
6. Cu hnh electron: 1s22s22p63s23p63d54 s1 hay [Ar]3d54s1. -V
tr : 24, chu k 4, nhm VIB Cu hnh trn c g bt thng? - Cu hnh crm c s
bt thng: 1e ca phn lp 4s nhy sang 3d c cu hnh bn bo ha bn hn.
7. Cu hnh electron: 1s22s22p63s23p63d54s1 hay [Ar]3d54s1. V tr
: 24, chu k 4, nhm VIB 7 I. V TR V CU HNH ELECTRON
8. I. V TR V CU HNH ELECTRON II. TNH CHT VT L 8 - Crom l kim
loi mu trng bc - Kim loi cng nht trong cc kim loi. - D=7.2g/cm3 ( l
kim loi nng ). - Nhit nng chy cao 1890oC
9. I. V TR V CU HNH ELECTRON II. TNH CHT VT L III. TNH CHT HA
HC 9 Da vo cu hnh e nguyn t, em hy d on tnh cht ha hc c bn ca Cr
??? - S oxi ha: t +1 n +6 nhng thng gp l +2, +3, +6 - Crom c tnh kh
mnh hn st
10. I. V TR V CU HNH ELECTRON II. TNH CHT VT L III. TNH CHT HA
HC 1. Tc dng vi phi kim - nhit thng, crom ch tc dng vi Flo. - nhit
cao, crom tc dng vi oxi, clo, lu hunh
11. I. V TR V CU HNH ELECTRON II. TNH CHT VT L III. TNH CHT HA
HC 1. Tc dng vi phi kim 2. Tc dng vi nc 11 Ti sao Cr li bn vng vi
nc v khng kh? Tnh cht ging vi cht no hc? ng dng ca tnh cht ny dng
lm g? Cr bn vi nc v khng kh do c lp mng oxit rt mng, bn bo v m crom
ln st bo v st v dng Cr ch to thp khng g.
12. I. V TR V CU HNH ELECTRON II. TNH CHT VT L III. TNH CHT HA
HC 1. Tc dng vi phi kim 2. Tc dng vi nc 3. Tc dng vi axit 12 a. Vi
dung dch HCl v H2SO4 long - Dd long ngui: Cr khng tc dng - Khi c
t0C: Cr + axit mui Cr(II) + H2 Cr + HNO3, H2SO4 c Cr3+ + sn phm kh
(NO2, NO, SO2) + H2O b. Vi dung dch HNO3 v H2SO4 c Lu : Cr khng tc
dng vi dung dch HNO3 hoc H2SO4 c, ngui.
13. 13 Hp cht ca crom Hp cht crom (II) Hp cht crom (VI) Crom
(VI) oxit Mui cromat v icromat Hp cht crom (III)
14. * Hp cht Crom c s dng u tin bi ngi Trung Quc vo khong 2000
nm trc, thuc triu i nh Tn. C th khi khai qut lng m Tn Thy Hong ngi
ta tm thy mt s thanh kim vi li kim c ph mt lp Cr2O3 dy 10 15
micromet * Tr hn, phng Ty, vo nm 1761 khong sn Crocoit c dng nh 1
cht mu trong hi ha. LCH S DNG HP CHT CROM 14
15. 15
16. 16 S oxi ho 0 +2 +3 +6 Cr2O3, Cr(OH)3, mui crom(III) CrO3,
mui cromat v icromat Cr kim loi CrO, Cr(OH)2, mui Crom (II) 1. Crom
(II) oxit, CrO CrO l mt oxit baz CrO c tnh kh, trong khng kh CrO d
b oxi ha thnh crom (III) oxit Cr2O3. CrO
17. 17 S oxi ho 0 +2 +3 +6 Cr2O3, Cr(OH)3, mui crom(III) CrO3,
mui cromat v icromat Cr kim loi CrO, Cr(OH)2, mui Crom (II) 2.
Cr(OH)2 Cr(OH)2 c tnh kh Cr(OH)2 l mt baz, tc dng vi dung dch axit
to thnh mui crom (II)
18. 18 S oxi ho 0 +2 +3 +6 Cr2O3, Cr(OH)3, mui crom(III) CrO3,
mui cromat v icromat Cr kim loi CrO, Cr(OH)2, mui Crom (II) 3. Mui
crom (II) Mui crom (II) c tnh kh mnh CrSO4
19. 19 S oxi ho 0 +2 +3 +6 Cr2O3, Cr(OH)3, mui crom(III) CrO3,
mui cromat v icromat Cr kim loi CrO, Cr(OH)2, mui Crom (II) 4.
Cr2O3 Cht rn mu lc thm, khng tan trong nc Cr2O3 l mt oxit lng tnh:
tan trong dd axt v dd kim c. Cr2O3
20. 20 S oxi ho 0 +2 +3 +6 Cr2O3, Cr(OH)3, mui crom(III) CrO3,
mui cromat v icromat Cr kim loi CrO, Cr(OH)2, mui Crom (II) 5.
Cr(OH)3 Cht rn mu lc xm, khng tan trong nc L hiroxt lng tnh
Cr(OH)3
21. 21 S oxi ho 0 +2 +3 +6 Cr2O3, Cr(OH)3, mui crom(III) CrO3,
mui cromat v icromat Cr kim loi CrO, Cr(OH)2, mui Crom (II) 6. Mui
Cr(III) Mui crom (III) c tnh oxi ha v tnh kh. CrCl3
22. 22 S oxi ho 0 +2 +3 +6 Cr2O3, Cr(OH)3, mui crom(III) CrO3,
mui cromat v icromat Cr kim loi CrO, Cr(OH)2, mui Crom (II) 7. CrO3
Cht rn mu thm. L oxt axt CrO3 l cht oxi ha mnh CrO3
23. 23 S oxi ho 0 +2 +3 +6 Cr2O3, Cr(OH)3, mui crom(III) CrO3,
mui cromat v icromat Cr kim loi CrO, Cr(OH)2, mui Crom (II) 8. Mui
Crom(VI) L nhng cht c tnh oxi ha mnh Trong dd ca ion Cr2O7 2lun lun
c c ion CrO4 2- trng thi cn bng vi nhau
24. 24
25. -Crom (VI) rt c hi v gy t bin gen khi ht phi, trng thi dung
dch gy vim da d ng -Liu t vong ca cc hp cht crom (VI) c hi l khong
na tha tr vt liu . -Phn ln cc hp cht crom (VI) gy kch thch mt, da v
mng nhy -Crom (VI) c trong thnh phn ximng Porland gy bnh d ng ximng
-Ti M Crom (VI) c cng nhn l cht gy ung th ngi VAI TR SINH HC
26. C 4 chic xe ua, v 8 cu hi. Thi gian suy ngh tr li cho mi cu
hi l 10s. Tr li ng th chic xe s tin ln mt bc. Tr chi hon thnh khi
tt c cc xe u v ch.
27. 1 2 3 4 5 6 7 8
28. 1. Cp kim loi c tnh cht bn trong khng kh, nc nh c lp mng
mng bo v. Cr, Al 1009080706050403020100
29. 2. Nguyn t kim loi no c cng ln nht? Cr
1009080706050403020100
30. 3. Lp m Crom bo v kim loi khi b. n mn
1009080706050403020100
