Answer:
The pH value is 2.63, being an acid pH.
Step-by-step explanation:
PH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
The pH scale ranges from 0 to 14. Values less than 7 indicate the acidity range and those greater than 7 indicate alkalinity or basicity. Value 7 is considered neutral. Mathematically, pH is the negative logarithm of the molar concentration of hydrogen or proton ions (H⁺) or hydronium ions (H₃O⁺).
pH= -log [H⁺]= -log [H₃O⁺]
HBr dissociates completely in water, that is, in the ionization process they are completely transformed into negative anions or ions and hydrogen ions. Then the dissociation reaction will be:
HA + H₂O ⇒ H₃O⁺ + A⁻
HA being a general compound. In this case:
HBr + H₂O ⇒ H₃O⁺ + Br⁻
Complete dissociation implies that the initial concentration of acid is equal to the final concentration of H₃O⁺. Then the pH calculation is by the following expression:
pH= -log [H₃O⁺]
pH= -log 0.00234 M
pH= 2.63
The pH value is 2.63, being an acid pH.