Question

what is the molarity of a hcl solution if 2.50 l is needed to reacted with 12.7 g of al according to the reaction?

Answer 1

To find the molarity of the HCl solution, we use the balanced chemical equation and calculate the moles of HCl using the given information. The molarity of the HCl solution is 0.114 M.

Step-by-step explanation:

To find the molarity of the HCl solution, we need to use the balanced chemical equation:

2AlCl3 + 3H₂O(l) → Al2O3 + 6HCl(g)

From the equation, we can see that 6 moles of HCl are produced when 2 moles of AlCl3 react. The molar mass of AlCl3 is 133.33 g/mol. So, first, we need to calculate the moles of AlCl3 using the given information:

Moles of AlCl3 = 12.7 g / 133.33 g/mol = 0.0953 mol

Now, we can use the ratio from the balanced equation to calculate the moles of HCl:

Moles of HCl = (6 mol HCl / 2 mol AlCl3) * 0.0953 mol AlCl3 = 0.286 mol HCl

Finally, we can calculate the molarity of the HCl solution:

Molarity = Moles of HCl / Volume of solution = 0.286 mol / 2.50 L = 0.114 M