- cliffiE;e W*
BaO +H2O + Ba(OH)2 (4)
Ggi r, !, z, t thf t.u ld s6 mol cua Na, Ba,
Na2O, BaO, ta c6 ,r, 'LZ = Y: 22,4 0,05 (mol); 20.52 nsatoH)2 =;, : 0,12 (mol); x + 2y: 0,05 x 2:0,1 y + t:0,12 23x + l37y + 622 + L53t : 21,9.
Tri ba phuong trinh niy rut ra
zNaoH : x * 2z : 0,14 (mol);
rlcot :912 :0,3 (mol).
))a
L-) t
co2 + Ba(oH)2 + Baco:J + H2o (5)CO2 + 2NaOH + Na2CO3 + H2O (6) CO2 + 2NaOH + Na2CO3 + H2O (6)
CO2+ H2O+Na2CO3 -+2NaHCOz 0)
CO2 +H2O+BaCO:-+Ba(HCO3)z (8)56 mol COz tham gia phAn ung (5), (6), (7) ld 56 mol COz tham gia phAn ung (5), (6), (7) ld
0,12 +0,07 +0,07 :0,26 (mol).
SO mol COz 6 phin tmg (8) ld
0,3 - 0,26: 0,04 (mol).
Vfly kh6i lugng ktit tua BaCO: ld
(0,t2 - 0,04\x197 : 15,76 (g). D6p rln ilfng: B.
Cdch tdm ngdn gen. Chi cdn vi6t so dO
Nal
I
Bal
_ I + Hro+ Ba(oH), +NaoH + Hz
_ I + Hro+ Ba(oH), +NaoH + Hz
I
Ap dlmg. dinh luQt b6o toin kh6i luqng v6i
nguyOn td hidro, ta c6
0,12x2+ x+ 0,05x 2 0,34+ x
ii*2o:
2 : , .
Ap dSng dinh 1u0t b6o todn ttrOi tuqng AOi
vfitdt cit citc chdt ta c6
zl,g '2+ o'34+x" lg :20,52+4ox+ o,o5x2.Rirt ra;r :0,14. Cdc phintmg cira CO2 ld Rirt ra;r :0,14. Cdc phintmg cira CO2 ld
0,36x0,5x100 :0,15(mol).
/7NaoH can :
t20
Nhu vfly cri 1 ph6n tu Xphin img v6i 3 phdn tu NaOH, do t16 cAu tpo phdn tu ciraXphii ld
H-c:o
? + 3 NaoH -+ HCooNa +
,r'\-Off ONa
W .\.-o*u
(Nh6m -oH c6 tna ric,rlct Yrrr, o. ,;:;?
Nhu vfy, ktroi luqng chitrilnkhan gdm 0,05 mol HCOONa; 0,05 mol CoH+(ONa)z vi
0,03 mol NaOH du vd c6 kh6i luqng ld 0,05x68 + 0,05x154 + 0,03x40 : I2,3 (gam). Ddp 6n ihing: C
Cflu 23. Hdn hqp X gimNa, Ba, NazO, BaO.
Hod tan hodn todn 21,9 gam X vdo ntrbc, thu
droc 1,12 lit H2 @ dktc) vd dung dich Y,
trong do c6 20,52 gam Ba(OH)2. Hiip tha
hodn todn 6,72 lit khi CO2 @ktc) vdo Y thu
drqc m gam k€t tila. Gid tri ctia m ld
A.39,40. B. 15,76. C.23,64 D.21,92.
LN gi,rti. Thgc ch6t cria bdi to6n doi h6i tinh
s5 mol NaOH trong dung dich I'. Ntiu limtheo trinh t.u th6ng thuorg thi theo quy tic theo trinh t.u th6ng thuorg thi theo quy tic
sau: Vi6t c6c phuong trinh phin img vd tr6n
co sd d6 dflt cdc dn s6, lpp c5c phuong trinh
to6n hoc vd gi6i hQ phuong trinh. Cdc phdn *ng
2Na + 2HzO -+ 2NaOH + H2t (1)
Ba + 2H2O -+ Ba(OH)2 + lHzf Q)NazO + H2O -+ 2NaOH (3) NazO + H2O -+ 2NaOH (3)
IORN HQC ...r.r..r...r...