If 6.5g of zinc react with 5g of Hcl
Zn+2Hcl=zncl2+H2
Which substance is limiting reactants?
To determine the limiting reactant, we need to compare the number of moles of each reactant.
First, let's calculate the number of moles of zinc (Zn):
Molar mass of Zn = 65.38 g/mol
Number of moles of Zn = mass / molar mass = 6.5 g / 65.38 g/mol = 0.0994 mol
Next, let's calculate the number of moles of hydrochloric acid (HCl):
Molar mass of HCl = 36.46 g/mol
Number of moles of HCl = mass / molar mass = 5 g / 36.46 g/mol = 0.137 mol
Now, let's compare the mole ratios of Zn and HCl in the balanced equation:
Zn + 2HCl = ZnCl2 + H2
From the balanced equation, we can see that 1 mole of Zn reacts with 2 moles of HCl.
The ratio of moles of Zn to HCl is:
0.0994 mol Zn / 0.137 mol HCl ≈ 0.724
Since the mole ratio is greater than 1, it means that there are more moles of HCl than necessary to react with the given amount of Zn.
Therefore, the limiting reactant is zinc (Zn).