1)Cu+HCl=nu reactioneaza
x 1,2g
Zn+2HCl=ZnCl2+H2
65g 2g
[tex]A_{Zn}=65g/mol[/tex]
[tex]M_{H_2}=2A_H=2g/mol[/tex]
[tex]x=\frac{65*1,2}{2}=39g[/tex]
[tex]m=m_{Cu}+m_{Zn}=60g[/tex]
[tex]m_{Cu}+39g=60g[/tex]
[tex]m_{Cu}=21g[/tex]
[tex]c_1=\frac{m_{Zn}*100}{m}=65\%[/tex]
[tex]c_2=100\%-65\%=35\%[/tex]
[tex]2)Cu+2H_2SO_4=CuSO_4+SO_2+2H_2O[/tex]
