What is the definition of pH?CroSinus said:When I try to find - log 4.41 I get a negative value. I do not know how to interpret my result.
epenguin said:You can have a negative pH, though it is certainly wrong in your case and corresponds to > 1M strong acid.
Bystander said:What is the definition of pH?
That's it. There is no need to "interpret."CroSinus said:pH = - log (H+). Since HCl is a strong acid I assumed that c(HCl) = c(H+).
mjc123 said:"Concentrated" hydrochloric acid that you buy is typically 37% HCl. That's about 10 M. So 4.41 M is certainly possible.
The pH of a solution can be calculated using the formula pH = -log[H+], where [H+] is the concentration of hydrogen ions in moles per liter (M). In this case, the [H+] is equal to the concentration of HCl, which is 4.41 M. Therefore, the pH of a 4.41 M HCl water solution is -log(4.41) = 0.356.
Molarity (M) is a measure of the concentration of a solution, while pH is a measure of the acidity or basicity of a solution. Molarity is expressed in units of moles per liter (mol/L), while pH is a unitless scale ranging from 0 to 14.
The concentration of HCl directly affects the pH of a water solution. As the concentration of HCl increases, the concentration of hydrogen ions also increases, making the solution more acidic and lowering the pH. As the concentration of HCl decreases, the concentration of hydrogen ions decreases, making the solution less acidic and raising the pH.
Yes, the pH of a 4.41 M HCl water solution can be changed by adding a base to neutralize the acidic solution or by diluting the solution with water to decrease the concentration of HCl.
The pH of a 4.41 M HCl water solution will not change significantly with temperature. However, the concentration of HCl may change slightly due to changes in volume or dissociation of the acid at higher temperatures. Therefore, the pH may vary slightly but will still be close to the calculated value of 0.356.