Question

Which of the following is a reasonable pH for 0.015 M HCL?

1) 0.015
2) 1.82
3) 8.24
4) 12.18

Answer 1

The most reasonable pH for a 0.015 M solution of HCl is 1.82, as HCl is a strong acid that dissociates completely in water, making the pH equal to the negative logarithm of the hydrogen ion concentration.

Step-by-step explanation:

The question asks for the most reasonable pH for a 0.015 M solution of HCl. Hydrochloric acid (HCl) is a strong acid, which means it dissociates completely in water. Therefore, the concentration of hydronium ions ([H3O+]) in the solution will be equal to the concentration of HCl. We can calculate the pH using the formula:

pH = -log[H3O+]

For a 0.015 M HCl solution:

pH = -log(0.015) = 1.82

This calculation shows that option 2, which has a pH of 1.82, is the most reasonable pH value for a 0.015 M solution of HCl.