C. b anot xayra sir oxi hoa: Cu > C u^^+2e
5. Day cac kim loai deu c6 the dugc dieu ché biing phuong phap dien phan dung dich muoi cua chiing la
dich muoi cua chiing la
Ạ Ba, Ag, Aụ B. Fe, Cu, Ag. C. A l , Fe, Cr. D. Mg, Zn, Cụ
Huong dan gidi
Cac kim loai c6 tinh khir trung binh va yen c6 the dieu che bang phuong phap dien phan dung djch muoi chung.
Cac kim loai do c6 the la Fe, Cu, Ag. Dap an dung la H. 6- Hai kim loai c6 the dugc diSu che bang phirong phap dien phan dung djch la
Ạ C u v a A g . B. A l v a M g . C. Na va Fẹ D. Mg va Zn.
Huong dan gidi
CuS04 + H . O "^'^ > Cu + H,S04 + ) 4 o ,
2AgN03 + H.O - ^ i e ^ 2Ag + 2HNO3 + ) ^ Ọ
D a p a n d u n g l a Ạ
7. K i m loai nao sau day d i l u che dugc bang phircfng phap thuy luyen? A . M g . , B. K. C. Cạ D. Cụ
Hu&ng đn gidi
Cac kim loai c6 tmh khir trung binh hoac yeu (sau A l trong day dien hoa) c6 the
d i l u c\\€ bang phuong phap thiiy luyen => K i m loai Cụ
D a p a n d u n g l a 1).
8. Day cac k i m loai d^u c6 thd' duoc di^u ch6' bang phuong phap di6n phan dung dich mudi (vdi dien cue tro) la
A . L i , A g , Sn. B. N i , Cu, A g . C. Ca, Zn, Cụ D. A l , Fe, Cr.
Huong đn gidi
Cac kim loai trung binh va y6'u (sau A l ) c6 the duoc d i l u che bang phuong phap dien phan dung djch mudi => cac k i m loai la N i , Cu, A g .
D a p a n d u n g l a B .
Chii y: Cac kim loai manh nhu L i , Ca, A l , ... khdng the dieu che bang phuong phap dien phan dung dich.
9. Nhom k i m loai nao sau day ma khi di^u ch6' chi duoc dung phuong phap dien phan nong chaỷ
ẠNa,Fe,Al,Cu B.Na,Ca,Mg,Al C.K,Al,Cr,Cu D.Fe,Cr,Cu,Sn
Huong đn gidi
Cac kim loai manh (nhom l A , I I A , A l , ...) chi duoc dieu che bang phuong phap dien phan nong chay => Cac kim loai do la Na, Ca, M g , A l .
D a p a n d u n g l a B .
10. Tir hdn hop M g O , CuO, AUO, de diau che cac kim loai tucfng ling, ngoai cac
hoa chat, cin diing thfim cac phuong phap di6u che kim loai la
Ạ nhiet luydn va dien phan dung dich B. nhiet luyen va di6n phan nong chay C. nhidt luy6n va thuy luyen
D. thuy luydn va dien phan dung dich.
Hu&ng đn gidi
+ Di^u che Cu bang phuong phap nhiet luyen
Miilmuhn ,0
CuO + CO — ^ Cu + CO,
+ Di^u che M g , A l (kim loai manh) bang phuong phap di6n phan nong chay: M g O + 2HC1 - > M g C l , + H , 0
M g C l , ^P"' > M g + CI,
Cty TNHH MTV DVVH Khans Viet
2AUO, ^P";, > 4A1 + 3 0 ,
- criolit
D a p a n d u n g l a B .
11. Day cac kim loai d^u c6 thd' dieu chd'bang phuong phap thiiy luyfin la f, ;/
Ạ Ca, A l , Hg, A u . B. Cu, A g , Hg, A u . , ^ C. M g , A g , Hg, A u . D. Na, A g , Hg, A u .
Huong đn gidi
Phuong phap thuy luyen duoc ap dung de di^u ch6' cac kim loai c6 tinh khu trung binh va yeụ Thi du:
Zn + C U S O 4 > Cu + ZnS04 , ,^ Zn + 2 N a [ A g ( C N ) J ^ 2Ag + Na2 [ Z n ( C N ) ^
Zn + Hg ( N O 3 ) , -> Hg + Zn ( N O , )
Zn + 2Na A u ( C N ) •2Au + N a , Zn(CN)^
D a p a n d u n g la B .
12. Phan ung thiiy luyfen dieu chd' kim loai la
Ạ CO,+ N a r A l ( O H ) ^ ] B. C U S O 4 + N H 3 + H j O
C. Na A g ( C N ) . + Zn D. HgS + O,
Huong đn gidi
Phuong phap thuy luyen va phuong phap dung kim loai c6 tính khuf manh hon
đy kim loai yáu hon ra khoi dung djch hop chat.
T h i d u : 2 N a[Ag(CN) 2 ] + Z n —^ 2 A g 4 + Na2Zn(CN)4
,, I D a p a n diing l a C.
13. Phan ling hoa hoc nao sau day la saỉ
Ạ 2Ag:S + 3 0 , — ^ 2 A g 2 0 + 2S02 ' '
B. SiO, + Na,CO, —!—> NâSiO,, + CO, C. 3Fe,0, + CO — ^ 2Fe,04 + CO, D. ZnO + C — ^ Zn + CO
Huong đn gidi
Khi đt chay bac sunfua Ag,S bang O, thu dugc A g kim loai va SO,: Ag,S + 0 , — ^ 2 A g + S02
Plidn loai va phiranij p/icip j-'uii BT Hoa hoc 12 -Cu Thanh Toon