Answer to Question #108385 in Chemistry for john doe

Question

What is the pH of 1.65 x 10-4 M solution of HBr

Answer 1

HBr is a strong acid that completely dissociates in aqueous solutions:

HBr = H⁺ + Br^-

As a result, the concentration of H⁺ ions equals the concentration of HBr. As pH = -log[H⁺]:

pH = -log[H⁺] = -log(1.65 × 10^-4M) = 3.78

Answer: pH = 3.78