Hu&ng đn gidi
+ 3NaOH + Cr(N03)3 > Cr(0H)3 + 3NaN03 • NaOH + Cr(0H)3 > Na[Cr(0H)4] (tan) NaOH + Cr(0H)3 > Na[Cr(0H)4] (tan)
+ CO, + CăOH), • CaC03 + H,0
CO, + CaC03 + H,0 > CăHC03), (tan) + HCl + Na[Al(OH)4] > A1(0H)3 + NaCl + HjO + HCl + Na[Al(OH)4] > A1(0H)3 + NaCl + HjO
3HCl(a„) + Al(OH)3 > AICI3 + 3H,0 (tan)
+ 3NH3«,„) + 3 H, 0 + Aia3 > Al(OH)3 i + 3NH4CI
Dap an dung la D.
19. Thirc hien cac thi nghidm sau: • ; (I) Cho dung dich NaCl vao dung dich KOH. (I) Cho dung dich NaCl vao dung dich KOH.
(II) Cho dung dich Na^CO, vao dung dich CaCOH),.
(III) Dien phan dung dich NaCl vori ditn cue tro, c6 mang ngan.
(IV) Cho Cu(OH)2 vao dung dich NaNO,.
(V) Sue khi N H , vao dung dich NaNOj.
(VI) Cho dung dich Na2S04 vao dung dich BăOH),. Cac thi nghiem dieu che dugc NaOH la:
Ạ I I , I I I va V I . B. I I , V v a V I . C . I , I V v a V . D. I , I I va I I I .
Huong dan gidi
+ NaCl + K O H > khong xay rạ
+ Na,COi + CăOH)2 > 2NaOH + CaCO, i
+ 2NaCl + 2H2O > 2NaOH + C K T + H . t + Cu(OH)2 + NaNOj > kh6ng xay rạ
+ NH3 + NạCO, > khong xay rạ
+ Na2S04 + BăOH)2 > BaS04 i + 2NaOH z=> Cac thi nghiam di^u ch€ diroc NaOH la I I , I I I , V I .
Dap an dung la Ạ 20. Cho day cac chat: K O H , CăN03):, SO3, NaHSÔ, Na^SO,, K^SỘ 86' chat trong
day tao thanh ket tiia khi phan ufng vdri dung dich BaCl, la
Ạ 4. B.6. C.2. D . 3 .
Hu&ng dan gidi
Co 3 chat do la:
SO3 + H.O + BaCl 2 > BaS04 i + 2HC1
NâSOj + B a d , > BaSOj i + 2KC1 K,S04 +BaCl2 > BaS04i + 2KCl
Dap an dung la D. 21. Cho day cac chat: NH4CI, (NH4):S04, NaCl, MgCK, FeCl:, AICI3. So chat trong
day tac dung vdi luong du dung dich Bă0H)2 tao thanh ket tiia la
Ạ 4. B . l . C . 3 . D . 5 .
'* Hu&ng đn gidi
Cac chat do la:
(NH4)2S04 + BăOH), > BaS04 i + 2NH3 + 2H3O MgCl, + Bă0H)3 > MgCOH), i + BaCU
FeCl, + BăOH), > Fe(0H)2 i + BaCU
' Dap a;i dung la C .
158
Dang 14: Cau hoi ly thuyet
1. Nguyen tir ciia cac kim loai trong nhom l A khac nhau ve
Ạ so electron Idp ngoai ciing cua nguyen tir. . . B. so oxi hoa ciia nguyfin tijr trong hop chat. * < i ^ v . ; i s i n ' !>; , ;
C. k i l u mang tinh the ciia don chat. i^j. vj^?,:ij >> j ; :,; . „
D. cáu hinh electron nguydn tir.
Hu&ng đn gidi
* Nguyen tir ciia cac kim loai trong nhom l A (kim loai k i l m ) gi6'ng nhau v^:
- So electron ngoai Cling ciia nguySn tir (so electron hoa trj).
- S6'oxi hoa ciia nguyfen tir trong hop chat (+1). " ' - Kiáu mang tinh the ciia don chat (kieu mang tinh the lap phuong tam kh6'i). - Kiáu mang tinh the ciia don chat (kieu mang tinh the lap phuong tam kh6'i).
=> Khac nhau ve cáu hinh electron nguyen tiị
Dap an dung la D. 2. Phat bieu diing tinh chat ciia cac kim loai kidm tho:
Ạ Tinh khir ciia cac kim loai tang theo chieu tang ciia nang lirong ion hoạ B. Tinh khir cua kim loai tang theo chieu tang ciia ban kinh nguySn tir.
C. Tính khir ciia kim loai tang theo chieu tang ciia the dien cue chudn. .;i ,
D. Tinh khii tang theo chiau tang ciia do am dien.
Huong đn gidi
Tinh khir ciia cac kim loai (kim loai kiem th6) tang theo chi^u tSng ciia ban kinh nguyen tir.
Dap an dung la B.
Chii \: Tfnh khir ciia kim loai (kim loai kiem tho,...) giam theo chi^u tang:
- Nang lirong ion hoa (I2).