Science task 145: A New Zealand Level 3 learner evaluates evidence and justifies a conclusion in a complex context. A weak acid has pKa 4.5 at pH 5.5. What is [A⁻]/[HA]?

Science task 145: A New Zealand Level 3 learner evaluates evidence and justifies a conclusion in a complex context. A weak acid has pKa 4.5 at pH 5.5. What is [A⁻]/[HA]?

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