Question

What is the hydronium ion molar concentration in a solution whose pH is 6.52 at 25 °C?

A. 3.0 × 10⁻⁷ M
B. 3.0 x 10⁻⁸ M
C. 7.5 M
D. 3.3 x 10⁶ M

Answer 1

The hydronium ion concentration of a solution with a pH of 6.52 at 25 °C is 3.0 × 10^-7 M, which is answer A.

Step-by-step explanation:

The student has asked to find the hydronium ion molar concentration in a solution with a pH of 6.52 at 25 °C. To do this, we can use the formula pH = -log [H3O+], where [H3O+] represents the concentration of hydronium ions in moles per liter (M). Since the pH is given, we can rearrange the formula to solve for the hydronium ion concentration:

[H3O+] = 10^-pH

So, for a pH of 6.52, the calculation would be [H3O+] = 10^-6.52.

Calculating this gives a value of approximately 3.0 × 10^-7 M. Therefore, the correct answer to this question is A. 3.0 × 10^-7 M.