C. e:Orud D e:-Lrad ,
Sau t6t cd cdc phin img ,R trong ROH dA
chuy6n h6t vdo RoCOe.
Ap dqng b6o todn nguyCn tO d6i vdi R, ta c6 :
^ 30.1,2.20yo ^ 9,54rtRoH = /-ttazcot = O *, : z. rtRoH = /-ttazcot = O *, : z. ,pa 60 + R = 23 (Na); fiRoH =0,18; nprgq:0,09. So d6 phin img : HrO Bes /;# 0.1smol / uI(m{d \-J \ O.lml \ I {#tryz.w.W"I
Ap dsng bio todn nguyen to a6i ttiT{u
cho tohn bQ qu6 trinh phin img, ta c6 :
| 2 ncu{oon = fl nzco3 + ncoz r-
I 0., o'oe ?
| 4 nrrrroo, i n aou. = 2nuzo rl + 2 nxr6 r21
l\---:-- ---- \---:- I ol 0.16 o.l ? - lrr, = 0,1 I mol n11rs 12; = 0,l9 mol --\1
l*: *ro, * trluzo(zt =8,26 gam
DLp 6nD. *Thi dg 5. Cho 6,A8 sam chdt hfiu co X chttra C, H, O tdc dqng voi dung dich NaOII vi'a du, sau dd chu'ng kh6 thi phin bay ho'i
clti c6 nuttt:, phAn chh rdn khan cdn lqti chu.a hai mu6i cita natri chidm khdi lryng 9,44
:,
gum. I'lung hai muoi ndy trong oxi du', stt'u khi
phan ung hodn todn thtt dr.r.o'c 6,36 gamNazCOt, 5,824 l{t khi COz @ktc) vd 2,52 gam NazCOt, 5,824 l{t khi COz @ktc) vd 2,52 gam ru,ro'c. Sd mol axi co trong X ld :
4.0,24. B. 0,06. C.0,12. D.0,20.
1Di thi thu'Dqi hoc tin 1 * THPT'Ydn Lqtt: *
Wnh Phil<:, ndm hlc 2An - 2014)
Hwimg ddn gidi
Ggi s6 mol H2O sinh ra trong phin rmg thriy phdn vd ph6n img <lOt cnay Dn luqt ld ns2s111
vdnpr612.,. Ap dpng bio toin nguy€n td Na cho toin b0 qu6 trinh phin img vd b6o todn
kh6i lugng trong phin img cua X v1i NaOH,
tac6:
(^
I n *oo, = 2/t uozcot = 2.6,36 : 106 : 0,12
I
1m* + fltNooH = t/t-,6.i l-78 nuro tr,
ILJ
L 6.08 0.12.40 9.44 ?) ltuzo (t) = 0,08 mol. ) ltuzo (t) = 0,08 mol.
Theo bio todn nguy€n td C, H vir gitr thi6t, ta
c6:
= ltco2 * l?uazCOl = 0132
LYJ \_____vJ
0,26 0,06
= 2nazo 0) * 2nH2s 121 - llNooH.= 0,32