Zn +2HCl --->ZnCl2 +H2
a) Ta có
n\(_{H2}=\frac{0,896}{22.4}0,04\left(mol\right)\)
Theo pthh\
n\(_{Zn}=n_{H2}=0,04\left(mol\right)\)
m\(_{Zn}=0.04.65=2,6\left(g\right)\)
n\(_{HCl}=2n_{H2}=0,08\left(mol\right)\)
m\(_{HCl}=0,08.36,5=2,92\left(g\right)\)
b)Theo pthh
n\(_{ZnCl2}=n_{H2}=0,04\left(mol\right)\)
m\(_{ZnCl2}=0,04.136=5,44\left(g\right)\)
m\(_{axit}=\frac{2,29.100}{14,6}15,68\left(g\right)\)
m\(_{dd}=2,6+15,68-0,08=18,2\left(g\right)\)
C%\(=\frac{5,44}{15,68}.100\%=29,89\%\)
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