sumzup said:Since the concentration is extremely dilute and is < 1e-7, a phenomenon known as autoionization of water takes place...check out Example 3 under Strong Acids on http://www.science.uwaterloo.ca/~cchieh/cact/c123/stacids.html" for how to solve.
pH is a measure of the acidity or basicity of a solution. It is defined as the negative logarithm of the hydrogen ion concentration in moles per liter (pH = -log[H+]).
The formula for calculating pH is pH = -log[H+], where [H+] is the hydrogen ion concentration in moles per liter.
To calculate the pH of a solution, you need to know the concentration of hydrogen ions in moles per liter. Then, take the negative logarithm of this value to find the pH.
The concentration of hydrogen ions in a 1.00x10-8 M HClO4 solution is 1.00x10-8 moles per liter. This can be used to calculate the pH using the formula pH = -log(1.00x10-8) = 8.
A pH of 8 indicates that the solution is slightly basic, as it is above the neutral pH of 7. This means that there are more hydroxide ions (OH-) present in the solution than hydrogen ions (H+).