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    A drug has a molecular weight of 176.1g/mol and pKa of 4.17. Concentration is 50mg/ml. What is the pH of the drug solution? Can anyone help me out please ? Thank you
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    (Original post by j582)
    A drug has a molecular weight of 176.1g/mol and pKa of 4.17. Concentration is 50mg/ml. What is the pH of the drug solution? Can anyone help me out please ? Thank you
    Change units of the concentration of the acid to mol/dm^3; then use [H+] = sqrt of Ka * [Acid] from Ka expression (get Ka from pKa).
 
 
 

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