8.00 of are dissolved in water to make 4.00 of solution. What is the concentration of hydronium ions, , in this solution?
I am unsure
To find the concentration of hydronium ions, we need to first determine the number of moles of hydronium ions present in the solution.
Given:
- Volume of the solution = 4.00 L
- Amount of hydrochloric acid dissolved = 8.00 g
- Molar mass of hydrochloric acid (HCl) = 36.5 g/mol
To find the number of moles of HCl, we divide the mass of the substance by its molar mass:
moles of HCl = mass of HCl / molar mass of HCl
moles of HCl = 8.00 g / 36.5 g/mol
moles of HCl ≈ 0.219 moles
Since HCl ionizes completely in water to produce hydronium ions (H₃O⁺), the concentration of hydronium ions is equal to the number of moles of HCl (as it dissociates into H₃O⁺) divided by the total volume of the solution:
concentration of H₃O⁺ = moles of HCl / volume of solution
concentration of H₃O⁺ = 0.219 moles / 4.00 L
concentration of H₃O⁺ ≈ 0.0548 moles/L
Therefore, the concentration of hydronium ions (H₃O⁺) in this solution is approximately 0.0548 moles/L.