Final answer:
The pH of a 0.105 M HCl solution is calculated using the formula pH = -log[H₃O+], and since HCl fully dissociates, the pH is approximately 0.98.
Step-by-step explanation:
To calculate the pH of a 0.105 M HCl solution, you make use of the formula pH = -log[H₃O+]. Since hydrochloric acid (HCl) is a strong acid, it fully dissociates in water.
Therefore, the concentration of hydronium ions [H₃O+] is equal to the concentration of HCl.
Plugging the value into the formula, you get:
pH = -log(0.105) = 0.98 approximately.
HCl, being a strong acid, has a relatively low pH, indicative of its acidic nature.