Final answer:
The concentration of hydrogen ions for a solution with a pH of 7.65 is calculated using the antilogarithm of the negative pH value, resulting in a hydrogen ion concentration of 2.24 x 10^-8 M.
Step-by-step explanation:
The student asked how to calculate the concentration of hydrogen ions in moles per liter when a solution has a pH of 7.65. Using the formula pH = -log10[H+] where [H+] represents the concentration of hydrogen ions, and knowing that pH is a measure of acidity on a scale ranging from 0 to 14, we can find the concentration by the reverse process called the antilogarithm.
To calculate the hydrogen ion concentration, we rearrange the equation to [H+] = 10-pH. If the pH is 7.65, we can calculate the hydrogen ion concentration as [H+] = 10-7.65. Therefore, the concentration of hydrogen ions is 2.24 x 10-8 M.