nFe=m/M=2,8/56=0,05(mol)
a) PT:
Fe + 2HCl -> FeCl2 + H2\(\uparrow\)
1...........2............1................1 (mol)
0,05 ->0,1 - > 0,05 -> 0,05 (mol)
b) Khí thoát ra là H2
VH2=n.22,4=0,05.22,4=1,12(lít)
c) mHCl=n.M=0,1.36,5=3,65(g)
=> md d HCl =\(\dfrac{m_{HCl}.100\%}{C\%}=\dfrac{3,65.100}{10}=36,5\left(g\right)\)
Nhớ tick nhé
a,Ta co pthh
Fe + 2HCl \(\rightarrow\) FeCl2 + H2
b,Theo de bai ta co
nFe=\(\dfrac{2,8}{56}=0,05mol\)
Theo pthh
nH2=nFe=0,05 mol
\(\Rightarrow VH2_{\left(dktc\right)}=0,05.22,4=1,12l\)
c,Theo pthh
nHCl=2nFe=2.0,05=0,1 mol
\(\Rightarrow mct=mHCl=0,1.36,5=3,56g\)
\(\Rightarrow mdd_{HCl}=\dfrac{mct.100\%}{C\%}=\dfrac{3,65.100\%}{10\%}=36,5g\)
a)PTHH
Fe + 2HCl \(\rightarrow\) FeCl2 + H2
b) nFe = 2,8/56 = 0,05(mol)
Theo PT => nH2 = nFe = 0,05(mol)
=> VH2 = 0,05 . 22,4 =1,12(l)
c) Theo PT => nHCl = 2.nFe = 2 . 0,05 = 0,1(mol)
=> mHCl = 0,1 . 36,5 =3,65(g)
=> mdd HCl 10% = \(\dfrac{m_{ct}.100\%}{C\%}=\dfrac{3,65.100\%}{10\%}=36,5\%\)
a) Fe + 2HCl --> FeCl2 + H2 ( bay hơi)
b) nFe= 2,8 : 56 = 0,05 (mol )
Fe + 2HCl --> FeCl2 + H2
0,05 0,1 0,05 0,05 ( mol)
=> mH2 = 0,05. 2 = 0,1 gam
c) mHCl= 0,1 . 36,5= 3,65 (g)
=> mddHCL = \(\dfrac{mctan.100}{C\%}=\dfrac{3,65.100}{10}=36,5\left(gam\right)\)