Respuesta :
Answer:
Theoretical yield of hydrogen is 1.11 g
Explanation:
Balanced equation, [tex]Mg+2HCl\rightarrow MgCl_{2}+H_{2}[/tex]
As Mg remain present in excess therefore HCl is the limiting reagent.
According to balanced equation, 2 moles of HCl produce 1 mol of [tex]H_{2}[/tex].
Molar mass of HCl = 36.46 g/mol
So, 40.0 g of HCl = [tex]\frac{40.0}{36.46}moles[/tex] of HCl = 1.10 moles of HCl
Hence, theoretically, number of moles of [tex]H_{2}[/tex] are produced from 1.10 moles of HCl = [tex](\frac{1}{2}\times 1.10)moles=0.550moles[/tex]
Molar mass of [tex]H_{2}[/tex] = 2.016 g/mol
So, theoretical yield of [tex]H_{2}[/tex] = [tex](0.550\times 2.016)g=1.11g[/tex]
