Ẹ Dung Z n d^y Ca ra khoi dung dich a C l j .
Hay chon phuong phap dung.
5-3. Dé san xuát nh6m k i m loai ngudi ta dung cAc phuong phap :
1) Nhiet phan AI2O3 .
2) Khir oxit AI2O3 bang CO a nhiet d6 caọ 3) Dien phan AI2O3 nong chay c6 mat criolit. 3) Dien phan AI2O3 nong chay c6 mat criolit.
4) Dung Na d^y A l ra khoi dung dich AICI3.
5. Di6n phan muoi A I C I 3 nong chaỵ NhCrng phuang phap dung dirge la :
Ạ 3, 5 ; B. 1, 3, 4 ; ,
C. 2, 4, 5 ; D. Ca 5 phuang phap.
Hay chpn dap an diing.
6.4. Trong nhom lA, di tiJ trfin xu6'ng du6i :
1) Dien tich hat nhan tang dSn. 2) Ban kinh nguyen tir tang dan. 3) Do am dien tang dan.
4) So oxi hoa ciia kim loai ki^m trong cac hop chat giam dan. 5) Tinh phi kim giam đn, tinh kim loai tang dSn.
6) S6 16p electron trong nguyen tu tang dSn.
Nhirng mdnh de diing la :
Ạ 1,2, 3, 5; B. 2, 3, 4, 6; C. 1,2, 4, 6; • D. 1,2, 5, 6. Hay chon dap an diing.
6.5. Dac diem chung cua kim loai kidm (nhom lA) la :
1) Nguyen tir c6 1 electron 6 16p ngoai ciing.
2) Co ban kinh nguyen tir 16n dSn tir Li dén Fr. 3) C6 s6' oxi hoa +1 duy nhat trong c^c hcfp chat. 4) C6 d6 am dien giam dSn tir Li dén Fr.
5) Tao thanh cac hop chat ion. 6) Co tinh khir manh.
Nhirng tinh chat nao chi rieng kim loai ki^m mdi c6 ? Ạ 1,3, 5, 6; B. 1,2, 4, 6; C. 2, 3, 4, 5 ; D. 2, 4, 5, 6. 6.6. 6.7. 6.8. B.9.
Hoa lan hoan loan 15 gam CaC03 bang dung dich HCl va cho khi thoat ra hap thu het vao 500 ml dung djch NaOH 0,4M, dirge dung dich X. Cho lirgng du BaCl2 vao dung dich X c6 m gam két tiiạ
Kh6i lugng két tiia m la :
Ạ 7,25 gam ; B. 17,49 gam ;
C. 29,55 gam ; D. 9,85 gam.
Hay chgn dap s6' đng. • Hoa tan 20 gam h6n hgp hai mud'i cacbonat ciia kim loai h6a tri I va II
bang dung djch HCl dir. thu duoc dung dich X va 4,48 lit khi CO2 (dkic). Tdng khoi lugng muoi trong dung dich X la :
Ạ 16,8 gam ; C. 23,8 gam ;
Hay chgn dap an đng.
Hoa tan 3,94 gam BaCOj bang 500 ml dung dich HCl 0,4M. Th^ tich dung dich NaOH 0,5M c^n de trung hoa axit du la :
Ạ 180 ml; C. 320 ml;
Hay chgn dap .s6' diing.
B. 22,2 gam ; D. 16,2 gam.
B. 200 ml ; D. 400 ml.
X la dung dich chti-a 0,1 mol A I C I 3 va Y la dung dich chura 0,32 mol
NaOH. D 6 tir tir Y vao X.
Kh6'i lugng két tiia thu dugc sau khi d6 het Y vao X la :
Ạ 7,8 gam; B. 7,12 gam; ^ -^^-^ C. 3,12 gam; D. 6,24 gam. A
Hay chgn dap so dung. ^
5.10. lam két tiia lai Al(OH)3 tir dung dich NaAlOj c6 the diing nhiitig
chat:
Ạ CO2 , HCl, AICI3 •
3 M.d 95
B. C O 2 . N a 2 C 0 3 .
C. C O 2 , HCl, NaOH. D. CO2 , HCl, NajCOj. Hay chon dap an diing.
6.11. Nguyen nhan tao thanh thach nhQ trong cac hang dong cf niii da v6i la : Ạ Do phan ling cua CO2 (trong kh6ng khi) v6i CaO thanh CaC03. Ạ Do phan ling cua CO2 (trong kh6ng khi) v6i CaO thanh CaC03. B. Do CaO tac dung v6i SO2 va O2 tao thanh CaS04.
C. Do sir phan hiiy CăHC03)2 -> CaCOg + H2O + COj t . . D. Do xay ra phan ung ihuan nghich sau mot thdi gian dai ;