Tác dụng vừa đủ bạn nhỉ?
a, PTHH:
\(Zn+2HCl--->ZnCl_2+H_2\uparrow\)
b, \(n_{H_2}=\frac{44,8}{22,4}=2\left(mol\right)\)
Theo PTHH:
\(n_{Zn}=n_{H2}=2\left(mol\right)\Rightarrow m_{Zn}=2\cdot65=130\left(g\right)\)
c, Theo PTHH: ( Vdd không đổi nhé)
\(n_{HCl}=2n_{H2}=2\cdot2=4\left(mol\right)=>C_M\left(ddHCl\right)=\frac{4}{0,02}=200\left(M\right)\)
Vậy...
a) Zn+2HCl\(\rightarrow\)ZnCl2+H2
b)
nH2=\(\frac{44,8}{22,4}\)=2(mol)
nZn=nH2=2(mol)
mZn=2.65=130(g)
c)
nHCl=2nH2=2.2=4(mol)
CMHCl=\(\frac{4}{0,02}\)=200(M)