How do i calculate the pH of 0.0020mol/l HCl
HCl totally dissociates, so the hydrogen ion concentration is .002 M
pH = - log[H⁺] = - log(.002)
To calculate the pH of a solution of HCl, you need to use the formula for pH, which is defined as the negative logarithm (base 10) of the concentration of H+ ions in the solution. Since HCl is a strong acid, it completely dissociates in water, resulting in one H+ ion for every HCl molecule.
Step 1: Find the concentration of H+ ions in the solution.
Since the concentration of HCl is given as 0.0020 mol/L, the concentration of H+ ions is also 0.0020 mol/L.
Step 2: Take the negative logarithm of the concentration of H+ ions.
pH = -log[H+]
pH = -log(0.0020)
pH = -(-2.70)
pH = 2.70
Therefore, the pH of a solution with a HCl concentration of 0.0020 mol/L is 2.70.
To calculate the pH of a solution of HCl (hydrochloric acid), you need to know the concentration of HCl and the dissociation constant of HCl in water.
The concentration of HCl you provided is 0.0020 mol/L. This means that for every liter of solution, there are 0.0020 moles of HCl.
HCl is a strong acid, meaning it completely dissociates in water. The dissociation constant for HCl is 1.0 x 10^-7. This means that 100% of the HCl molecules will break apart into H+ ions and Cl- ions.
Since you now know the concentration of HCl and that it completely dissociates, the concentration of H+ ions can be calculated as 0.0020 mol/L.
The pH of a solution is defined as the negative logarithm (base 10) of the concentration of H+ ions. Thus, to find the pH, you need to take the negative logarithm (base 10) of the concentration of H+ ions.
In this case:
pH = -log[H+]
pH = -log(0.0020)
pH ≈ 2.70
So, the pH of the 0.0020 mol/L HCl solution is approximately 2.70.