Both soap and detergent are some type of salts. What is the difference between them
Carbon Compounds (10)Both soap and detergent are some type of salts. What is the difference between them ? Describe in brief the cleansing action of soap. Why do soaps not form lather in hard water ? List two problems that arise due to the use of detergents instead of soaps.
Answer
- Soaps are sodium or potassium salts of long chain carboxylic acids.
- Detergents are ammonium or sulphonate salts.
- Cleansing action of soap - One part of soap molecule is ionic / hydrophilic and dissolves in water. The other part is non-ionic / carbon chain / hydrophobic part which dissolves in oil.
- Thus soap molecules arrange themselves in the form of a micelle / diagram of a micelle.
On rinsing with water, soap is washed off, lifting the oily dirt particles with it.
Soap does not form lather in hard water because of the reaction of soap with Ca and Mg ions present in hard water which forms insoluble ppt. / scum.
Problems due to the use of detergents are:
- Detergents are non-biodegradable.
- It leads to water or soil pollution.
- It can also cause skin problems.
Exam Year:
2015
Related Questions
- What is a homologous series of carbon compounds
- Write the molecular formula of the following carbon compounds
- Write the molecular formula of benzene and draw its structure
- Write the number of covalent bonds in the molecule of ethane
- What happens when ethanol is heated at 443 K
- Draw the electron-dot structure for ethyne. A mixture of ethyne and oxygen is burnt for welding