(1,5Đ). C2H2 + 2AGNO3 + 2NH3 C2AG2 + 2NH4NO3 ……….0...
Câu 8.(1,5đ).
C
2
H
2
+ 2AgNO
3
+ 2NH
3
C
2
Ag
2
+ 2NH
4
NO
3
……….0,25đ
RCHO + 2AgNO
3
+ 3NH
3
+ H
2
O RCOONH
4
+ 2Ag + 2NH
4
NO
3
………0,25đ
C
2
Ag
2
+ 2HCl C
2
H
2
+ 2AgCl ………0,25đ
.=> n C
2
H
2
= 0,3 => m RCHO = 14,4 – (0,3.26) = 6,6g ………0,25đ
.nAg = 0,3 => n RCHO = 0,15 => M = 44 ……….0,25đ
.=> CH
3
CHO ……….……….0,25đ