Question

What is the ratio of lactic acid (Ka = 1.37x10-4) to lactate in a solution with pH =3.94?

Answer 1

PH = pka + log conjugate base [lactate in A mixture of lactic acid to lactate ion is an acidic bafter whose ph is given by Hendersen equation. Lactic acid Acid PH = 3.94; pka =- log ka =- log 1.37x104 = 3.86 3.94 = 3.86 + log Llactate ion) Tactic and] Tactic acid [lactate ion - 100.08 = 1.2023 Tactic acid) Ratio of lactic acid to lactate con - :1. 1.2023 = 0.832 : It is the molarity ratio. log lactate ion) - 3.94-3.86 = 0.08. Mass ratio = moles x molar mass. To prepare I litre of butter, ratio of the mass of lactic acid to lactate ion we have to take mass of lactic acid = 0.832 molest 90.08 g/mol = 75.07g. Mass of lactate ion = imolx molar mass of the salt of lactic and you have of lacche and selected.