Question

Please, can someone help me with this? It's very urgent. Calculate the pH of 0.001 M of HCl.

a) 3
b) 1
c) 7
d) 11

Answer 1

The pH of a 0.001 M HCl solution is 3.0, which indicates that the solution is acidic.

Step-by-step explanation:

To calculate the pH of a 0.001 M HCl solution, use the formula pH = -log [H3O+]. Since HCl is a strong acid, it dissociates completely in water, so the concentration of H3O+, which is the same as the initial concentration of HCl, is 0.001 M. Now, substitute the known concentration into the equation and solve.

pH = -log [1 × 10­3] = 3.0

This solution is acidic since its pH is less than 7.