Calculate the pH of stomach acid with given concentration of HCl

Calculation of pH of stomach acid with [HCl] = 0.149 M

Stomach acid is mainly composed of hydrochloric acid (HCl). In order to determine the pH of stomach acid with a concentration of HCl equal to 0.149 M, we can use the formula pH = -log[H3O+].

Given:

[HCl] = 0.149 M

Final answer:

The pH of stomach acid with [HCl] = 0.149 M can be calculated using the formula pH = -log[H3O+]. For HCl, [H3O+] is equal to [HCl], so the calculation is pH = -log(0.149).

Explanation:

To calculate the pH of stomach acid with a given concentration of HCl, you can use the pH formula: pH = -log[H3O+], where [H3O+] is the hydronium ion concentration which is equal to [HCl] for strong acids like HCl.

Using the provided concentration of HCl (0.149 M), we assume complete dissociation because HCl is a strong acid. Therefore, [H3O+] = [HCl] = 0.149 M.

The calculation would then be: pH = -log(0.149). Using a calculator, you would type in "0.149", press the "log" button, and then the +/- button to get the negative log. This will give you the pH value.