Cho 8,4 gam sat tac dung vua du voi dung dịch hcl sau phan ung nguoi ta thu duoc muoi sat 2 clorua fecl2 va khi hidro
a) viet phan ung hoa hoc
b) tinh khoi luong axit can dung cho phan ung tren
c) tinh the tich khi hidro sinh ra o dieu kien tieu chuan
a) Fe + 2HCl => FeCl2 + H2
b) nFe= 8,4/56= 0,15 (mol)
=> nHCl=2nFe=2.0,15=0,3 (mol)
=> mHCl= 0,3.36,5=10,95 (g)
c) nH2=nFe=0,15 (mol)
=> VH2=0,15.22,4= 3,36 (l)
$n_{Fe}=8,4/56=0,15mol$
$a/Fe+2HCl\to FeCl_2+H_2↑$
$\text{b/Theo pt :}$
$n_{HCl}=2.n_{Fe}=2.0,15=0,3mol$
$⇒m_{HCl}=0,3.36,5=10,95g$
$\text{c/Theo pt :}$
$n_{H_2}=n_{Fe}=0,15mol$
$⇒V_{H_2}=0,15.22,4=3,36l$