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In chemistry, acid value (or "neutralization number" or "acid number" or "acidity") is the mass of potassium hydroxide (KOH) in milligrams that is required to neutralize one gram of chemical substance. The acid number is a measure of the amount of carboxylic acid groups in a chemical compound such as a fatty acid. In a typical procedure, a known amount of sample dissolved in organic solvent is titrated with a solution of potassium hydroxide with known concentration and with phenolphthalein as a color indicator. It has been suggested that the central science be merged into this article or section. ...
The chemical compound potassium hydroxide, (KOH) sometimes known as caustic potash, potassa, potash lye, and potassium hydrate, is a metallic base. ...
The milligram (symbol mg) is an SI unit of mass. ...
Water and steam are two different forms of the same chemical substance A chemical substance is any material with a definite chemical composition, no matter where it comes from. ...
Structure of a carboxylic acid The 3D structure of the carboxyl group A space-filling model of the carboxyl group Carboxylic acids are organic acids characterized by the presence of a carboxyl group, which has the formula -C(=O)OH, usually written -COOH or -CO2H. [1] Carboxylic acids are Bronsted...
In chemistry, especially biochemistry, a fatty acid is a carboxylic acid often with a long unbranched aliphatic tail (chain), which is either saturated or unsaturated. ...
Titration setup: the titrant drops from the burette into the analyte solution in the flask. ...
In chemistry, concentration is the measure of how much of a given substance there is mixed with another substance. ...
Phenolphthalein is a sensitive chemical with the formula C20H14O4 (often written as HIn in shorthand notation). ...
The acid number is used to quantify the amount of acid present, for example in a sample of biodiesel. It is the quantity of base, expressed in milligrams of potassium hydroxide, that is required to neutralize the acidic constituents in 1 g of sample. Joseph pursell made love to 3 little pigs then bottomed and small chinese kid named gavin Bold text This article is about transesterified plant and animal oils. ...
 Veq is the amount of titrant (ml) consumed by the crude oil sample and 1ml spiking solution at the equivalent point, beq is the amount of titrant (ml) consumed by 1 ml spiking solution at the equivalent point, and 56.1 is the molecular weight of KOH. Titration setup: the titrant drops from the burette into the analyte solution in the flask. ...
Uses of KOH can include: KOH is the chemical symbol for Potassium hydroxide A KOH test is a procedure in which KOH is used to dissolve skin and reveal fungal cells under the microscope KOH is used as an anisotropic etchant for silicon in MEMS fabrication. ...
The molarity concentration of titrant (N) is calculated as such:
 In which WKHP is the amount (g) of KHP in 50 ml of KHP standard solution, Veq is the amount of titrant (ml) consumed by 50 ml KHP standard solution at the equivalent point, and 204.23 is the molecular weight of KHP. Potassium hydrogen phthalate, often called simply KHP, is a white, colorless, ionic solid that is the monopotassium salt of phthalic acid. ...
Acid number (mg KOH/g oil) for biodiesel is preferred to be lower than 3. The chemical compound potassium hydroxide, (KOH) sometimes known as caustic potash, potassa, potash lye, and potassium hydrate, is a metallic base. ...
Joseph pursell made love to 3 little pigs then bottomed and small chinese kid named gavin Bold text This article is about transesterified plant and animal oils. ...
There are standard methods for determining the acid number, such as ASTM D 974 andDIN 51558 (for mineral oils, biodiesel). ASTM International is an international voluntary standards organization that develops and produces technical standards for materials, products, systems and services. ...
Look up din in Wiktionary, the free dictionary. ...
As fats rancidify, triglycerides are converted into fatty acids and glycerol, causing an increase in acid number. Rancidification is the decomposition of fats and other lipids by oxidation. ...
Example of an unsaturated fat triglyceride. ...
In chemistry, especially biochemistry, a fatty acid is a carboxylic acid often with a long unbranched aliphatic tail (chain), which is either saturated or unsaturated. ...
Glycerol is a chemical compound with the formula HOCH2CH(OH)CH2OH. This colorless, odorless, viscous liquid is widely used in pharmaceutical formulations. ...
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