Lactic Acid (HC₃H₅O₃)is a Monoprotic Acid That Forms When Milk

Multiple Choice

Lactic acid (HC₃H₅O₃) is a monoprotic acid that forms when milk becomes sour. A 40.00 mL sample of an aqueous lactic acid solution required 26.50 mL of 0.140 M NaOH(aq) to neutralize it by a titration. From this data, what is the molar concentration of lactic acid in the solution? Hint: Write out the equation and be sure to use the correct units when dealing with molarity.

A) 0.0928 M
B) 0.148 M
C) 0.211 M
D) 0.757 M
E) 0.928 M