How do you calculate saponification value?

Answer 1

(AOAC 920.160) In duplicate about 2g of the oil sample is added to a flask with 30ml of ethanolic KOH and is then attached to a condenser for 30 minutes to ensure the sample is fully dissolved. After sample has cooled 1ml of phenolphthalein is added and titrated with 0.5 M HCl until a pink endpoint has reached. (AOAC 920.160) In duplicate about 2g of the oil sample is added to a flask with 30ml of ethanolic KOH and is then attached to a condenser for 30 minutes to ensure the sample is fully dissolved. After sample has cooled 1ml of phenolphthalein is added and titrated with 0.5 M HCl until a pink endpoint has reached. -divya

Answer 2

Saponification values are highly significant in the making of soap. It is important that the sap value is just right too high and the soap might contain too much alkali even though there is sufficient soapiness that it would react with skin whilst a sap value too small -the fatty acid salts will not be sufficient enough to remove or saponify the fat or oil and less soapiness.

Answer 3

The saponification value of an oil is the amount of alkali required to saponify a definite quantity of the sample.

It is expressed as the number of milligrams of potassium hydroxide (KOH) required to neutralize 1 gram of the sample.

Answer 4

You can find the saponification values of any oil, fat or butter through various websites with SAP charts. If you need to figure lye/water solution for oils/fats/butters to create soap, the formula is a simple algebra eqaution as follows: (x) . (y) = z (x) / (y) = z (x) - (y) = z More specifically : ( Oil Weight ) x ( SAP Value of Oil) = Amount of Lye Then.. ( Amount of Lye) / ( 0.3) = Total Weight of Lye/water solution Then.. (Total of Lye/Water Solution) - ( Amount of Lye) = Amount of water

Answer 5

To calculate saponification value, you divide the molecular weight of the fat or oil by its average number of ester linkages. The molecular weight of the fat or oil is the sum of the molecular weights of its fatty acids and glycerol. The saponification value is expressed in milligrams of potassium hydroxide (KOH) required to saponify one gram of the fat or oil.

Answer 6

The significance of saponification number is that it measures the exact value of potassium hydrate in milligrams. This will measure unbonded and bonded acids in fat.

Answer 7

Both saponification value and number is same