What is the pH of a 1×10−4 mol HCl solution?(1 point)
8
6
4
2
2
To find the pH of a solution, we need to use the formula:
pH = -log[H+]
In this case, we are given the concentration of HCl as 1×10^−4 mol. This means the concentration of H+ ions is also 1×10^−4 M, because HCl is a strong acid and fully dissociates in water to produce H+ ions.
Now, we can plug the concentration of H+ ions into the pH formula:
pH = -log(1×10^−4) = -(-4) = 4
Therefore, the pH of a 1×10^−4 mol HCl solution is 4.
To determine the pH of a solution, you need to know the concentration of the hydrogen ions (H+) in the solution.
In the case of hydrochloric acid (HCl), when it dissolves in water, it completely dissociates into H+ ions and Cl- ions. This means that the concentration of H+ ions in the solution is equal to the concentration of HCl.
Given that the solution has a concentration of 1×10−4 mol HCl, we can determine the concentration of H+ ions as well. Since HCl dissociates into one H+ ion, the concentration of H+ ions is also 1×10−4 mol.
To calculate the pH of a solution, you can use the formula:
pH = -log[H+]
where [H+] represents the concentration of H+ ions in moles per liter.
In this case, [H+] = 1×10−4 mol/L
By substituting this value into the formula, we can calculate the pH:
pH = -log(1×10−4) ≈ 4
Therefore, the pH of a 1×10−4 mol HCl solution is 4.