Question
Science task 155: A New Zealand Scholarship candidate must demonstrate synthesis, independence and insight rather than routine recall. A weak acid has pKa 4.6 at pH 5.6. What is [A⁻]/[HA]?
Select an option. Your answer will be checked instantly.
Correct Answer: B. 10.0
Explanation:
Henderson–Hasselbalch gives a ratio of 10.
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