- Chodung dich NaHS03 vdo honhdp con lai thi (C2H5)20 khong phan iing di/dc tach ra c6n C 2 H 5 C H O phan itng tao ket tua, Ipc lay két tua cho tdc dung vd
a)Vietphi /dngtri nhh oah oc cua cac phanu 'ng xayrạ
b) T i n h t h a n h p h a n p h a n t r S m khói li/dng c u a m o i chát t r o n g A t i n h the tich
d u n g d j c h N a O H da d a n g . ^ j^aii a) PhUdng t r i n h p h a n iJng : C H 3 C H O + 2 A g N 0 3 + 3NH3 + H2O C H 3 C O O N H 4 + 2 A g i + 2NH4NO3 0,1 m o l ' : 0,2 m o l C H j C O O H + N a O H > C H 3 C 0 0 N a + H2O . / — m o l — m o l b) So m o l A g : nAg = — = 0,2 ( m o l ) K h 5 i l i W n g C H 3 C H O : mcHaCHO = 44.0,1 = 4,4 ( g ) ' T ' ' " ^ ""CH-iCOOH = 10 - 4,4 = 5,6 ( g ) , nMK\ yAMr =^ S o ' m o l C H 3 C O O H : n c H j C O O H = ( m o l ) ,,,,„„,, T h a n h p h a n % k h o i l U d n g m o i c h a t trong A : ^'^'•^^^ • ^^f-^''^- ' % m c H , C H O = ^ X 1 0 0 % = 4 4 % => % m c H 3 c o o H = 5 6 % T h e t i c h d u n g d i c h N a O H : VNaow = • ~ = - ^ = 0,47 ( l i t ) .
B a i 7. T i n h do d i ^ n l i a ciia C H 3 C O O H trong dung dich 0 , 0 I M . B i e t r^ng trong 5 0 0 m l d u n g d i c h n a y c6 t o n g c p n g 3,13.10^' t i e u p h a n ( g o m cdc i o n va cac p h a n tuT a x i t k h o n g d i ^ n l i ) . (:iivi,),;;j -..^
(Trich De thi CDKT Ki thuat CNIỊ khoi A)
PhiTdng t r i n h d i ? n l i : C H 3 C O O H - > C H 3 C O O " + H + '^-'^ ' ^ *
X X X . ^
So m o l C H 3 C O O H : ficHjCOOH = 0,01.0,5 = 0,005 ( m o l ) ' " ' So p h a n tuf C H 3 C O O H h o a tan = 0,005 x 6. l O " = 0,03. l O " ( p h a n tuT) G i a sur X la so p h a n tijf d i ^ n l i => tong so i o n sinh ra la 2 x
=> T o n g so h a t t r o n g 5 0 0 m l d u n g dich Ik :
( 0 , 0 3 . 1 0 " - x ) + 2 x = 3,13.10^' => x = 0 , 1 3 . 1 0 ^ ' ( p h a n tuf) D o d i e n l i a : a = ^ ' ^ ^ " ' ^ , = 0.043 hay 4 3 % . ' '
0,03.10"
B a i 8. C h o c a n x i cacbua p h a n i^ng v d i nxidc r o i d a n k h i sinh ra sue qua d u n g dich
g o m H g S 0 4 . H2SO4, H2O d 8 0 " C t h i thu diTdc h o n h d p A g o m h a i chat k h i . D e
xac d i n h h i e u suat phan iJng ngifdi ta cho 2,02g h o n h d p A phan tfng v d i d u n g dich A g N 0 3 trong a m o n i a c dif, t h i thu di/dc 1 l , 0 4 g h o n h d p r i l n B .
a) H a y viét phúdng t r i n h h o a hoc ciia cac phan iJng x a y rạ '^'"^ ^ '' b) T i n h hieu suaít phan iJng cpng niTdc v a o axctilen trong trufdng hdp da n e u .
Gidi
a) PhiTdng t r i n h p h a n iJng : •^•>^^' "'•'"f^" .» Ó^' nsv.').
C a C 2 + 2H2O > C2H2t + C a( 0 H ) 2 -i"'^*' ^f"*^ «*a 'l^'^""
, ) 0 i C H ^ C H + H2O - J i s | 2 i ^ C H 3 C H O 80 C 0,04 m o l 0,04 m o l 2,02g h o n h d p A g o m C H ^ C H O i x m o l C2H2 d u - i y m o l - 1 ^ C H 3 C H O + 2 A g N 0 3 + 3NH3 + H2O > C H 3 C O O N H 4 + 2 A g l + 2NH4NO3
x m o l , , .,, \'hi .i- •.. 2 x mol;'.M;,''y
C H ^ C H + 2 A g N 0 3 + 2NH3 — > A g - C = C - A g i + 2NH4NO3
y m o l , , , y m o l , . ,, j ' f '
l l , 0 4 g h o n h d p r a n B J ' ^ ^ . f ^ ' f J \' -If ,
C2Ag2