What is the pH of a 0.7 M aqueous solution of KBr?
A) 10⁻⁰·⁷
B) 10⁻⁷
C) 0.7
D) 7
E) 13.3
IMAT 2025 · Question 40
Q40 - Hydrolysis
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The correct answer is D) 7.
KBr comes from a strong acid (HBr) and a strong base (KOH), so neither ion reacts with water. The solution stays neutral, pH 7, whatever the concentration.
10⁻⁷ is the H⁺ concentration in neutral water, not the pH itself, so B mixes up the two.
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