Mg+2HCl---> MgCl2+H2
=> A là H2, B là MgCl2
Số mol H2=4,48/22,4=0,2(mol)
Mg+2HCl---> MgCl2+H2
...0,2...0,4.................................0,2(mol)
a)\(\%_{Mg}=\frac{0,2.24}{10}.100=48\left(\%\right)\)
\(\%_{CuO}=100\%-48\%=52\left(\%\right)\)
CuO+2HCl---->CuCl2+H2O
0,065....0,13........0,065(mol)
b)\(C\%=\frac{0,53.36,5}{200}.100=9,6725\left(\%\right)\)
c)\(C\%_{MgCl_2}=\frac{0,2.95}{209,6}.100\approx9,065\left(\%\right)\)
\(C\%_{CuCl_2}=\frac{0,065.135}{209,6}.100=4,2\left(\%\right)\)
#Walker