Answer :

Henderson–Hasselbalch equation is given as,





pH = pKa + log [A⁻] / [HA]
-------- (1)



Solution:



Convert Ka into pKa,





pKa = -log Ka





pKa = -log 1.37 × 10⁻⁴





pKa = 3.863



Putting value of pKa and pH in eq.1,





4.29 = 3.863 + log [lactate] / [lactic acid]



Or,




log [lactate] / [lactic acid] = 4.29 - 3.863




log [lactate] / [lactic acid] = 0.427



Taking Anti log,




[lactate] / [lactic acid]
= 2.673



Result:



2.673 M
lactate salt when mixed with 1 M Lactic acid produces a buffer of pH = 4.29.

Thanks for taking the time to read What is the ratio of lactic acid tex K a 1 37 times 10 4 tex to lactate in a solution with tex pH 4. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada