\(n_{Cl_2}\)\(\dfrac{6,72}{22,4}=\) 0,3 (mol)
Gọi nFe = x (mol), nZn = y (mol) trong 15,35g hỗn hợp
2Fe + 3Cl2 \(\underrightarrow{t^o}\) 2FeCl3
x 1,5x x (mol)
Zn + Cl2 \(\underrightarrow{t^o}\) ZnCl2
y y y
\(\Rightarrow Ta\) có hệ \(\left\{{}\begin{matrix}56x+65y=15,35\\1,5x+y=0,3\end{matrix}\right.\)\(\Rightarrow\)\(\left\{{}\begin{matrix}x=0,1\\y=0,15\end{matrix}\right.\)
\(\Rightarrow\)%(m) Fe =\(\dfrac{56.0,1}{15,35}\). 100%= 36,48%
%(m) Zn = 100 - 36,48 = 63,52 %
à quên câu b
FeCl3 + 3AgNO3 -> Fe(NO3)3 + 3AgCl
0,1..........0,3..................0,1...........0,3
ZnCl2 + 2AgNO3 -> Zn(NO3)2 + 2AgCl
0,15.........0,3...............0,15.........0,3
=> CM ddAgNO3=\(\dfrac{\left(0,3+0,3\right)}{0,5}\)=1,2 (M)
mAgCl = (0,3 + 0,3) . 143,5 = 86,1 (g)