\(n_{Al\left(pu\right)}=a\left(mol\right)\)
\(2Al+3Cu\left(NO_3\right)_3\rightarrow3Cu+2Al\left(NO_3\right)_3\)
b) Theo PTHH có
\(m\left(tang\right)=m_{Cu}-m_{Al\left(pu\right)}=64\cdot1,5a-27a=11,04\\ \Rightarrow a=0,16\left(mol\right)\\ m_{Al\left(pu\right)}=27\cdot0,16=4,32\left(g\right)\\ m_{Cu\left(spu\right)}=64\cdot1,5\cdot0,16=15,36\left(g\right)\)
c) \(C_{M\left(Cu\left(NO_3\right)_2\right)}=\dfrac{0,16\cdot1,5}{0,5}=0,48\left(M\right)\)
d)\(C_{M\left(Al\left(NO_3\right)_2\right)}=\dfrac{0,16}{0,5}=0,32\left(M\right)\)
(Điều kiện :Sau phản ứng coi Vdd thay đổi không đáng kể)
2Al + 3Cu(NO3)2 = 2Al(NO3)3 + 3Cu
x 1,5 x x 1,5 x mol
m tang = m cu - m al
11,04=96 x-27 x=>x=0,16mol
mcu=0,24*64=15,36g m al =0,16*27=4,32g
CM cu(no3)2=0,24/0,5=0,48M
CM al(no3)2=0,16/0,5=0,32M
a, PTHH :
2Al + 3Cu(NO3)2 \(\rightarrow\) 2Al(NO3)3 + 3Cu
x.............1,5x..................x..................1,5x
b, m Al tăng = 11,04 g
\(\Leftrightarrow\) m Cu - m Al = 11,04 g
\(\Leftrightarrow\) 64 . 1,5x - 27x = 11,04
\(\Leftrightarrow\) 69x = 11,04 \(\Leftrightarrow\) x = 0,16
m Al = 0,16 . 27 = 4,32 g
m Cu = 11,04 + 4,32 = 15,36 g
c, m Cu(NO3)2 = 1,5x =1,5 . 0,16 =0,24 mol
Cm Cu(NO3)2 = 024 : 0,5 = 0,48 M
d, Cm Al(NO3)2 = 0,16 : 0,5 = 0,32 M
a, PTHH :
2Al + 3Cu(NO3)2 \(\rightarrow\) 2Al(NO3)3 + 3Cu
x.............1,5x...................x..................1,5x
b, m Al tăng = 11,04 g
\(\Leftrightarrow\) m Cu - m Al = 11,04 g
\(\Leftrightarrow\) 64 . 1,5x - 27x = 11,04
\(\Leftrightarrow\) 69x = 11,04 \(\Leftrightarrow\) x = 0,16
m Al = 27 . 0,16 = 4,32 g
m Cu = 11,04 + 4,32 = 15,36 g
c, n Cu(NO3)2 = 1,5 . 0,16 = 0,24 mol
Cm Cu(NO3)2 = 0,24 : 0,5 = 0,48 M
d, Cm Al(NO3)3 = 0,16 : 0,5 = 0,32 M