a) PTHH: Zn +2 HCl -> ZnCl2 + H2
nZn=6,5/65=0,1(mol)
Theo PTHH và đề bài, ta có:
nH2=nZn=0,1(mol)
nHCl=2.nZn=0,1.2=0,2(mol)
=>VddHCl=0,2/2=0,1(l)=100(ml)
=>V=100(ml)
b) V(H2,đktc)=0,1.22,4=2,24(l)
\(n_{Zn}=\dfrac{m}{M}=\dfrac{6,5}{65}=0,1\) ( mol )
Zn + 2HCl → ZnCl\(_2\) + H\(_2\)
0,1 mol → 0,2 mol → 0,1 mol
\(V=\dfrac{n}{C_m}\dfrac{0,2}{2}=0,1\) ( l )
\(V_{HCl}=n.22,4=0,1.22,4=2,24\) ( l )