Answer to Question #114772 in Chemistry for tristan

Question

What is the pH of an aqueous solution having a hydronium-ion concentration of 6.83 × 10-3 mol/L? Is the solution acidic or basic?

Answer 1

According to the definition:

pH = - log[H₃O⁺]

where [H₃O⁺] - concentration of hydronium ions.

As a result:

pH = -log(6.83 × 10^-3) = 2.17

As pH < 7, the solution is acidic.