Question

While performing an experiment of finding the Acid number, he notes that the volume of KOH
consumed by one oil sample is lower than that of another oil sample. What could be the possible reason
for this observation?

Answer 1

Answer:

Machine lubricants deteriorate over time, thus forming acidic by-products that can corrode machine components. Hence, it is necessary to monitor the acidity level in the oil as it ages by measuring either the acid in the oil or the remaining alkalinity from additives in the oil.