Acid Value Of Saponification

1035 Words 5 Pages
IV. METHODOLOGY
SAPONIFICATION VALUE
Saponification is a method used in treating a neutral fat with alkali, breaking it down to glycerol and fatty acids. The saponification value or saponification number is the amount of alkali needed to saponify the given quantity of fat or oil, expressed as mg potassium hydroxide to saponify 1 g of the sample.
In this experiment, the researchers used chemicals such as ethanol, hydrochloric acid (HCl), potassium hydroxide (KOH) and phenolphthalein indicator. Laboratory Apparatuses and Equipment such as 650 mm long Air (reflux) condenser, 250 ml beakers, Buchner funnel, boiling beads, 50 ml burets, Coconut oil sample, filter papers, 250ml Erlenmeyer flasks, pipettes, side-arm flask, hot plate, water bath
…show more content…
It is the percentage by weight of a specific fatty acid. The Acid value is defined as the mg of potassium hydroxide needed to neutralize the free acids present in 1 g of oil.
In this experiment, the researchers used chemicals and reagents such as ethanol, Sodium hydroxide (NaOH) and Phenolphthalein Indicator. Laboratory Apparatuses and Equipment such as 250ml beakers, Buchner funnel, 10ml buret, 250ml Erlenmeyer flasks, coconut oil sample, filter paper, 100ml graduated cylinder, volumetric pipette, side-arm flask, hot plate and Analytical balance.
First, filter the oil sample using filter paper to remove impurities. Next, weigh 5g of coconut oil into 250ml Erlenmeyer flask. Then, add 100ml of neutralized ethanol and 2ml of phenolphthalein indicator. After that, shake until the mixture is completely dissolved. Titrate with standard base 0.1N NaOH, shake vigorously until the endpoint is reached. This is indicated by a slight pink color that persists for 30 seconds. Record the volume of the titrant used. Finally, repeat the steps more carefully in triplicate, recording each weight of the sample and the volume of the

Related Documents