a) \(n_{H_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)
PTHH: 2M + 6HCl --> 2MCl3 + 3H2
0,4<--1,2<-----0,4<---0,6
=> \(M_M=\dfrac{10,8}{0,4}=27\left(g/mol\right)\)
=> M là Al
b) \(C\%_{dd.HCl}=\dfrac{1,2.36,5}{200}.100\%=21,9\%\)
mdd sau pư = 10,8 + 200 - 0,6.2 = 209,6 (g)
\(C\%_{dd.AlCl_3}=\dfrac{0,4.133,5}{209,6}.100\%=25,5\%\)
a)
\(n_{H_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)
PTHH: 2M + 6HCl ---> 2MCl3 + 3H2
0,4<--1,2<------0,4<------0,6
\(\rightarrow M_M=\dfrac{10,8}{0,4}=27\left(g\text{/}mol\right)\)
=> M là Al
b)
\(C\%_{HCl}=\dfrac{1,2.36,5}{200}.100\%=21,9\%\)
\(m_{dd}=200+10,8-0,6.2=209,6\left(g\right)\\ \rightarrow C\%_{AlCl_3}=\dfrac{0,4.133,5}{209,6}.100\%=25,48\%\)
\(n_{H_2}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\\
pthh:2M+6HCl\rightarrow2MCl_3+3H_2\uparrow\)
0,4 0,6
\(M_M=\dfrac{10,8}{0,4}=27\left(g\right)\)
mà M hóa trị III
=> M là Al
\(pthh:2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)
\(C\%_{HCl}=\dfrac{1,2.36,5}{200}.100\%=21,9\%\\
m_{\text{dd}}=10,8+200-\left(0,6.2\right)=209,6\left(g\right)\\
C\%_{AlCl_3}=\dfrac{0,4.133,5}{209,6}.100\%=25,477\%\)