Multiple Choice
For the following acids in water, which is the weakest acid?
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17. Acid and Base Equilibrium
Ka and Kb
Multiple Choice
Which of the following values represents the strongest base in water?
A
B
C
D
Verified step by step guidance1
Recall that the base dissociation constant, \(K_b\), measures the strength of a base in water; a larger \(K_b\) value indicates a stronger base because it dissociates more to produce OH\(^-\) ions.
Compare the given \(K_b\) values by their magnitudes: \(1.0 \times 10^{-8}\), \(1.0 \times 10^{-12}\), \(1.0 \times 10^{2}\), and \(1.0 \times 10^{-3}\).
Identify which \(K_b\) value is the largest among the options, since the strongest base corresponds to the highest \(K_b\) value.
Understand that a \(K_b\) value of \(1.0 \times 10^{2}\) is significantly larger than the others, indicating it represents the strongest base in water.
Conclude that the base with \(K_b = 1.0 \times 10^{2}\) is the strongest base because it dissociates the most in water, producing the highest concentration of OH\(^-\) ions.
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