- Giai doan tiép theo cung dupe thife hien trong 16 th6i nhung ngimg th6i khi O, vao 16 Ket qua la dong (I) trong C u O va CU2S bj luru huynh 6 darg sunfua khijf
1. Cho so 66 chuyen hoa:
fH2S04 1 - K X ) - - ^ Y ) - +B12+KOH MZ)- +H9SO41 T va Y liin luot la A . K2Cr04va Cr2(S04)3 C. K2Cr,07vaCrS04 ! ^ ^ ^ +FeS04+H2S04 B. K2Cr,07vaCr2(S04)3 D. K . C r A v a C r C l j .
Hu&ng dan gidi
Cac PTPLT xay ra:
Cr + H2SO4 (^) ^ CrS04 + H2 I ( X ) • k ; 6CrS04 + 3Cl2->2Ci2(S04)3 + 2CrCl3 gnub ; , K ; M i j f i • ( X ) ( Y ) • : Cr(S04 ) 3 + Br2 + KOH -> K2Cr04 + K 2 S O 4 + KBr + H2O • k . (Y) ( Z ) HL 2K2Cr04 +H2S04-^K2Cr207 + K 2 S O 4 + H2O ! BP*"' ' ( Z ) ( T )
H K2Cr207 +6FeS04 +7H2SO4 ->3Fe2(S04)3 + K 2 S O 4 +Cr2(S04)3 +7H2O
B ( T ) „ , (Y)
v a y T va Y \in lugt la K^Cr^O, va Cr,(S04)3 i
| | , Dap an dung la B.
Hị Cho so do phan irng: i ; f ; : ' ; !
• L , ^ + N H v i * ' / v x + d d N a O H \H - v - \4 I .
^ • ^ n J j ^ > (A; > ( A | ; >K^2> ^y^i)
B C a c chát X , , X 3 lan lugt la
H L A. Na2Cr04 va NaCrOj B. NaCrO, va NạCr.O,
Pfc. NaCrO, va Na,Cr04 D. Na,Cr207va NaCrO,
Huong dan gidi ''^
| | Cac PTPLT xay ra trong so d6: f lAỊ 2Cr03 + 2NH3 — ^ C r j O j + N2 + 3H2O 1 ! A£
( X ) I Cr203+2NaOH(đ) + 3 H 2 0- > 2 N a[ C r ( O H) J ' ' I
( X , )
2 N a r C r ( 0 H ) ^ ] + 3CI2 + 8NaOH -> 2Na2Cr04 + 6NaCl + 8H2O ( X , ) ( X 2 )
1^ Na2Cr04 + H2SO4 ( l ) H2Cr04 + Na2S04
V a y X „ X . la rNaCr(OH) 1 ( N a j C r O j ) va Na2Cr04 .
Dap an diing la C .
Dang 20: Dai tap viet P T H H de giai thich, xac dinh cac chat phan iimg vol nhau, san pham, phan umg oxi hoa - k h u , . . .
1. Day gom cac chat đu tac dung duoc vd'i dung dich Fe(NO,)2 la A . A g N O , , CK, N H „ HCl B. M g , CU, N a O H , N a Q A . A g N O , , CK, N H „ HCl B. M g , CU, N a O H , N a Q C. K I , C l „ N H „ N a O H D. A g N O , , N a O H , Cu, H C l .
Huong dan giai
Cac cha't tac dung vdi dung dich FeCNO,):: ' + ^O^iCid
A g N O , + Fe(NỌ,), A g + FeCNO,), . • ( X ) 3CK+ 6Fe(NO,,): ^ 4Fe(N03),, + 2FeCl., ' 4 .. { / 3 3) i' 3 2 N H , + 2H3O + Fe(N0.,)2 ^ F e C O H ) . ! + 2NH4NO,
12HC1 + 9Fe(NO,,)2 - > 5Fe(NO,),, + 4FeClj + 3NO + 6H2O
Dap an dung la Ạ
Chu v.- - H C l tac dung vdri Fe(NO,): vi trong moi truomg H ^ ion NO3 o x i hoa
dugc ion Fe"*. - B loai vl NaCl; - C loai VI K I ;
- D loai vl Cụ
2. Cac chat vira tac dung vdi dung djch FeCNO,), vira tac dung vdi dung dich NaOH la
A . A l , H C l , NaHS04, AgNỌ, B. CỌ, NaHCO,, Mg, Cạ C. A l , H C l , Na,S, CuCNO,).. D . A U O , , H2SO4, NH4CI, NâCOj
Huong dan giai
Cac chat phan ung vdi FeCNO,). va NaOH: 2 A l + 3 F e( N 0 3 ) 2- > 3 F e + 2 A l ( N O , ) ,
' 2 A l + 2N aO H + 6H20->2NiiAl(OH)^+3H2
12HCl + 9 F e ( N O , ) , ^ 5 F e ( N O , ) , + 4 F e C l 3 + 3 N O + 6 H 2 0
H C l + N a O H N a C l + H2O
12NaHS04 + 9 F e ( N 0 3) 2 -^6Na2S04 + 5Fe(N03)3 + 2Fe2 (804)3 + 3 N 0 + 6H2O
NaHS04 + NaOH ->Na2S04 + H2O
AgN03 + F e( N 0 3 ) 2- > F e( N 0 3)3 + A g
2 A g N 0 3 + 2 N a 0 H ^ A g 2 0 + 2NaN03 + H j O
Dap an diing la A-
Cry TNHH AfTV D\ // kluin^ Viet