What does sodium hydroxide do to oil?

such as caustic soda (sodium hydroxide), acts on natural fats or oils, such as tallow or vegetable oil, to produce sodium fatty acid salt (soap) and glycerin (or glycerol). This saponification reaction is the basis for all soapmaking.

What was the purpose of adding NaOH to the oil in the saponification lab?

Because the fatty acids are ions, they are soluble in low concentrations in water (actually they are soluble because they form micelles), but in high concentration form insoluble aggregates called soap. You will start with a vegetable oil and will use NaOH to hydrolyze these triglycerides.

Does sodium hydroxide dissolve in oil?

Sodium hydroxide is frequently used as an industrial cleaning agent where it is often called “caustic”. It is added to water, heated, and then used to clean process equipment, storage tanks, etc. It can dissolve grease, oils, fats and protein-based deposits.

How do you make soap with sodium hydroxide and oil?

How to make soap

1. Add 100 ml of used cooking oil into a 300-ml container.
2. Add water (the amount shown above) into a milk carton.
3. Add NaOH (the amount shown above) to water in 2, seal the carton lid, and mix.
4. When the flakes disappear (the mixture becomes transparent), add it into the oil in 1.

Why is NaCl used in soap making?

The addition of salt (sodium chloride) to the crude form of soap forms fatty-acid salts. The sodium ions from the sodium chloride bond with the fatty acid, forming a product that is less soluble in water. Because of this reduced solubility, the soap leaves the solution and forms a solid mass.

Why does NaCl help to precipitate the soap from aqueous solution?

The salt reacts with the water that would go toward acting as a solvent for the organic molecule. The inorganic salt is more “thirsty” than the organic molecule and deprives the soap of sufficient water to keep it soluble. This causes the soap to precipitate.

How does sodium hydroxide make soap?

When mixed with water, sodium hydroxide dissociates completely to just hydroxyl and sodium ions. The hydroxyl ions carry a negative charge, and the sodium ions have a positive one. This influx of ions leads to a strong exothermic reaction, which helps hydrolyze fats in the saponification process to form soaps.

What is the pH of soap?

9-10
Results: Majority of the soaps have a pH within the range of 9-10. Majority of the shampoos have a pH within the range of 6-7.

https://www.youtube.com/watch?v=OYtrZB55Pzo