Practice question
Question
An aqueous solution of aspirin (HA) is prepared at pH 7.4. The ratio of concentration of A ⁻ and HA at equilibrium is ______ (round off to the nearest integer). Given: Ka of aspirin is 3.98 × 10 ⁻ ⁴ (NAT)
Explanation
This outcome reflects verbal and logical reasoning, where grammar, vocabulary and inference determine correct usage. Option NAT captures this correctly because it meets linguistic and logical standards, consistent with textbook descriptions and experimental observations in general aptitude.
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