phan biet 3 chat ran sau :
CuSo4 , ca(oh)2 , NaNo3
cho cac chat sau : Ag,cu,zn,mg,zn(oH)3, ca(oH)2, so3, N2O5, CUSO4, BACL,NO, CA(HCO3)2,NA2O, MGCO3,ZnO
a, chat nao tac dung voi H2O
b, chất nao tac dung voi H2SO4
c,Chất nao tac dung voi KOH
d, chất nào tác dụng voi AgNO3
Viet PT phan ung
a) SO3 N2O5 Na2O
b) Zn Mg Zn(OH)3 Ca(OH)2 BaCl2 Ca(HCO3)2 Na2O MgCO3 ZnO
c) SO3 N2O5 Zn ZnO Zn(OH)3 Ca(HCO3)2 CuSO4
d) CuSO4 Zn Mg BaCl2
nung 500g da voi chua 95% CaCO3 phan con lai la tap chat ko bi phan huy. sau mot thoi gian nguoi ta thu duoc chat ran va khi B .vietPTHH xay ra va tinh khoi luong chat ran A thu duoc biet hieu suat phan huy CaCO3 la 80%
Dung khi CO khu hoan toan 38,4 g hon hop A gom FeO, CuO o nhiet do cao. Sau phan ung thu duoc hon hop chat ran B, hon hop khi C. Chia hon hop thanh 2 phan bang nhau: Phan 1 cho tac dung voi 400g đ Ca(OH)2 3,7% thay pu vua du va thu duoc 15g ket tua trang Phan 2 cho td voi 250 ml dd NaOH 3M. Co can đ sau pu thu duoc a g chat ran khan 1,tinh % ve khoi luong cua 2kim loai trong B 2, tinh a
cho a(g) hon hop bot mg,zn,fe vao dung dinh cuso4 du. phan ung xong loc bo dung dich thu duoc a(g) chat ran. viet phuong trinh phan ung va tinh thanh phan phan tram ve khoi luong cua fe trong hon hop dau biet so mol fe bang so mol cua mg
CAu 3: nhiet phan 66,2g Pb(NO3)2 thu duoc 55,6g chat ran. Tinh hieu suat cua phan ung nhiet phan
- biet phan ung nhiet phan theo so do sau:
Pb(NO3)2 --> PbO + NO2 + O2
( giup em vs nek)
Bổ túc pt sau:
1/Al(OH)3 =>__+__
2/Cu(OH)2 + __ =>CuSO4+ __
3/P2O5 + __ => Na3PO4 + ___
4/AgNo3 + __ => NaNo3 +__
5/Fecl2 + __ => Fe(OH)2 + ___
6/CuO + __ => Cucl2 + ___
7/ CuSO4 + NaOH =>
8/ Ca(OH)2 + H2SO4 =>
1/ 2Al(OH)3 --> Al2O3 + 3H2O
2/ Cu(OH)2 + H2So4 --> CuSo4 + 2H2O
3/ P2O5 + 6NaOH --> 2Na3PO4 + 3H2O
4/ AgNo3 + NaCl --> NaNo3 + AgCl
5/ FeCl2 + 2NaOH --> Fe(OH)2 + NaCl
6/ CuO + 2HCl --> 2H2O + CuCl2
7/ CuSO4 + 2NaOH --> Cu(OH)2 + Na2SO4
8/ Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O
1. Al2O3 + H2O
2. H2SO4\(\rightarrow\) H2O
3. NaOH \(\rightarrow\)H2O
4. NaCl \(\rightarrow\) AgCl
5. NaOH \(\rightarrow\) NaCl
6. HCl \(\rightarrow\) H2O
7. Cu(OH)2 + Na2SO4
8. CaSO4 + H2O
Dun nong 22,12g pemanganat thu duoc 21,16g hon hop ran theo so do phan ung sao
KMnO4 thanh K2MnO4 +MnO2+O2
A;lap phuong trinh hia hoc hay cho biet ti le so phan tu cua cac chat trong phuong tri h hoa hoc da lap
B:tinh the tich khi oxi (dktc) thu duoc sau phan ung va emhay cho biet ti khoi cua khi do doi voi kk la bao nhieu
C: tinh khoi luong cua hon hop chat ran thu duoc sau phan ung
cac ptpu nao sau day la phan ung oxi hoa khu :
CO + O2 ---------> CO2
AL + Fe2O3 -----------> Al2O3 + Fe
Mg + CO2 ----------> MgO + CO
CO + H2O -------> Ca(OH)2
va can bang phuong umngh oxi hoa khu, cjo biet chat oxi hoa, chat khu
2CO + O2 \(\underrightarrow{t^o}\) 2CO2\(\uparrow\)
2AL + Fe2O3 \(\underrightarrow{t^o}\) Al2O3 + 2Fe
Mg + CO2 \(\rightarrow\)MgO + CO
CO + H2O \(\rightarrow\) Ca(OH)2 (pt này sai bn ơi)
( CHANg le K co Ai BiEt LAM bai Nay SAo)
BAi 1: dot chay hoan toan 1g hop chat huu co A, thu duoc 3,384g CO2 va 0,694g nuoc. Hon hop A la chat khi co ti khoi so voi khong khi la 2,6g
- xac dinh cong thuc don gian cua A
( giup mik voi nek, )
BAI 2: nhiet phan 66,2g Pb(NO3)2 thu duoc 55,4g chat ran. Tinh hieu suat cua phan ung nhiet phan
- Biet phan ung nhiet phan theo so do sau:
Pb(NO3)2 --> PbO + NO2 + O2