Table of Contents
What is the solvent in the synthesis of soap?
This process is called saponification and is illustrated in Figure 1. Like synthetic detergents, soaps are “surface active” substances ( surfactants ) and as such make water better at cleaning surfaces. Water, although a good general solvent, is unfortunately also a substance with a very high surface tension.
What are the chemical composition of soap?
For centuries, humans have known the basic recipe for soap — it is a reaction between fats and a strong base. The exact chemical formula is C17H35COO- plus a metal cation, either Na+ or K+. The final molecule is called sodium stearate and is a type of salt.
When soap is formed during saponification a liquid separates out what is the name of this liquid?
In the traditional one-step process, the triglyceride is treated with a strong base (e.g. lye), which cleaves the ester bond, releasing fatty acid salts (soaps) and glycerol. This process is also the main industrial method for producing glycerol. In some soap-making, the glycerol is left in the soap.
What is the process of precipitation of soap from the suspension?
The process of precipitation of soap from the suspension is called salting out.
Which element is present in soaps and detergents?
Sodium hydroxide
Alkali. Sodium hydroxide is employed as the saponification alkali for most soap now produced. Soap may also be manufactured with potassium hydroxide (caustic potash) as the alkali.
What happens to the glycerol during saponification?
Saponification can be defined as a “hydration reaction where free hydroxide breaks the ester bonds between the fatty acids and glycerol of a triglyceride, resulting in free fatty acids and glycerol,” which are each soluble in aqueous solutions.
What is the use of the hydrophobic end of the chemical composition of soap and detergent?
The other end of soap molecues hate water – they are hydrophobic. These drops of oil are suspended in the water. This is how soap cleans your hands – it causes drops of grease and dirt to be pulled off your hands and suspended in water. These drops are washed away when you rinse your hands.
What happens during the saponification process?
Saponification is simply the process of making soaps. During saponification, ester reacts with an inorganic base to produce alcohol and soap. Generally, it occurs when triglycerides are reacted with potassium or sodium hydroxide (lye) to produce glycerol and fatty acid salt, called ‘soap’.
What is the key ingredient in most bar soap?
Lye is the most commonly used alkali for soap-making. The chemical name for lye is sodium hydroxide. Another type of alkali is potassium hydroxide, also known as potash. The type of alkali used affects the final properties of the soap product.