Question

What's the pH of an acid that has a hydronium ion concentration of 1.905 × 10⁻⁵ mol/L?

Answer 1

Solution:

[H₃O⁺] = 1.905×10^-5 mol/L

To calculate the pH of a solution, use the equation:

pH = −log[H₃O⁺]

pH = −log[1.905×10^-5] = 4.72

pH = 4.72

Answer: pH = 4.72