Huong đn gidi
Day g6m cac chat:
H, T+ B a [ A l ( O H J , ] ^ ( ^"^^""^^ Al ^ " 2 ^ ^ ) A l , ( S O , + T
BaZnÔ < ^'^^°">2 Na ^"^^'^ ) Z n S O , 4- H^O , ^
t +NaOH < ^^"''<"")2 Na _ t i l 2 5 2 4 _ ^ NâSO, f T
KOH< "^^"'""^2 K O H - " 2 ^ ^ ) K , S O , + H , 0 H^O + NH3 + BaCl2 < ""^^""^2 N H 4 C I > NH4CI
Dap an dung la D.
Chu v.- Cac chat khdng thoa man Mu ki6n la: FeCl2 (A);MgCl2 ( E ) ; B a O ( C ) 18. Cho h6n hop chat ran gom CaC., AI4C3 va Ca vao nUorc thu duoc h6n hop X
g6m 3 khi, trong do c6 hai khi cung s6' mol. Láy 8,96 lit h6n hop X (dktc) chia lam hai phSn bang nhaụ Phdn 1 cho vao dung djch AgNO, trong NHjCdu), sau phan li-ng hoan toan, tháy tach ra 24 gam ket tuạ PhSn 2 cho qua Ni, dun nong thu duoc hOn hop Y . The tich O, v&a du (dktc) cSn dung d^ d6't chay hoan toan Y l a '
Ạ 5,6 lit B. 8,4 lit C. 8,96 lit D. 16,8 lit
Hu&ng đn gidi
S6 mol khi X trong m6i phSn: nx/2 -8,96/(22,4.2)=0,2(mol) ;^ ,. Theo bai ra: nAg2C2 =24/240=0,l(mol)
Goi X, y, z ISn lirot la s6' mol m6i khi trong m6i phan:
CaC2 + 2H20->C2H2 t + Că0H)2 X (mol) Al4C3 + 1 2 H 2 0 ^ 3 C H 4 t +4Al(OH)3 i y(mol) Ca + 2H20->CăOH)2 + H2 t z (mol)
Taco: x + y + z = 0,2 (I) 'hhnto
PTPir: C2H2 + Ag20 )Ag2C2 i + H20 .,f H O ) l A A
X - > X {
T a c 6: x = 0,l (2) Tir(l,2) => y + z = 0,l (3)
Theo bai ra, c6 hai khi c6 s6' mol bang nhau => 2 khi do la CH4 va (y = z)'
-C7y TNHHWnrDWH Khana Viet
Tiif(3) => y = z = 0,05. Sod6: X — ^ ^ i ^ Y
Ap dung djnh luat bao toan nguyen t6' ^ lirong O, cin di dÓt chay Y bang
luong O, cin di dÓt chay X. ,
PTPl/: C 2 H 2+ - 0 , ^ 2 C O , + H . O 0,1 -> 0,25 C H 4 + 2 0 2 ^ C 0 2 + 2 H 2 0 0,05 0,1 H 2 + ^ 0 2 - > H 2 0 0,05-^0,025
>no2 =0,25+0,l+0,025=0,375(mol) =^¥0^ =0,375.22,4=8,4 (lit)
Dap an dung la B.
Hoa tan hoan toan m gam Na va 1 lit dung djch H Q a M, thu duoc dung djch G va a mol khi thoat rạ Day gdm cac chat deu tac dung duoc vdi dung djch G la Ạ Ni, NâSOj, CăHC03)2 B. Zn, AKO3, NaHSOj