alleryStart learning →Why is an aqueous solution of potassium bromide neutral?
ABecause both of its ions are heavy and slow
BBecause both of its ions are pure spectators
CBecause its two ions cancel each other exactly
DBecause bromide precipitates the potassium ion
Answer & Solution
Correct answer: B. Because both of its ions are pure spectators
1. Potassium ion is the cation of the strong base potassium hydroxide.
2. Bromide ion is the anion of the strong acid hydrogen bromide.
3. Neither ion donates or accepts protons to any measurable extent in water.
4. With both acting as spectators, the pH is left at its neutral value.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 14 "Acid-Base Equilibria", section 14.4 Hydrolysis of Salt Solutions_
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