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Ibuprofen is an acidic drug molecule with a pKa of 3.97. Drug formulations for Ibuprofen need to keep the pH at 4.33 and the concentration

Ibuprofen is an acidic drug molecule with a pKa of 3.97. Drug formulations for Ibuprofen need to keep the pH at 4.33 and the concentration of Ibuprofen at 344 mM. What concentration Ibuprofen conjugate base is needed in the drug formulation to maintain the pH and Ibuprofen requirements? Put your answer in mM of conjugate base.

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