Answer
The pH of the initial solution is equal to 0.757
Work Step by Step
The initial solution is a $0.175 M$ $HBr$ one, with no other compounds.
Since $HBr$ is a strong acid, it will completely dissociate in water, so the concentration of hydronium ion is also equal to $0.175 M$.
- Calculate the pH value:
$pH = -log[H_3O^+]$
$pH = -log( 0.175)$
$pH = 0.757$
