Q. 194.3( 8 Votes )

<span lang="EN-US

Answer :

Soaps are defined as the sodium salts of fatty acids Example:


C17H35COO-Na+ Sodium stearate


C15H31COO-Na+ Sodium palmitate


whereas detergents are sodium salts of a long chain benzene sulphonic acids. Example:


CH3- (CH2)11 - C6H4 -SO3- Na+


CH3 – (CH2)10 – CH2 – SO4 Na+


The action of soap in removing an oily spot from a piece of cloth is as follows:


When a dirty cloth having oily spot is put in water containing dissolved soap, the oil is not dissolved in water. The soap molecules are salts of sodium and potassium of long chain carboxylic acid. The acid end of soap is hydrophilic i.e. water loving , and gets dissolved in water and the carbon chain dissolves in oil. Soap molecules forms micelles structure in which one end of the soap molecule is attached to the oil droplet and the other end towards the water. The formation of soap micelles thus removes oil particles from the surface and the surface is cleaned.



If the water is hard, it reacts with calcium and magnesium ions which are present in hard water and results in formation of calcium and magnesium salts which doesn’t gives lather. The precipitate formed gets sticks to clothes and interferes in the cleaning of clothes. Therefore, soaps are not used for washing clothes when the water is hard.


The two problems that arise due to the use of detergents instead. of soaps


1. These are non-biodegradable substances and can’t be broken into simpler substances by microorganisms. They remain as such in the environment.


2. They creates pollution in environment and also harmful when eaten by any animal.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Glimpses of IndiaGlimpses of IndiaGlimpses of India39 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :
What are the raw matLakhmir Singh & Manjit Kaur - Chemistry
How is soap made? WrLakhmir Singh & Manjit Kaur - Chemistry
Why are carbon and iLakhmir Singh & Manjit Kaur - Chemistry
Why have detergents Lakhmir Singh & Manjit Kaur - Chemistry
Which of the two is Lakhmir Singh & Manjit Kaur - Chemistry
What is a detergent?Lakhmir Singh & Manjit Kaur - Chemistry
What is a soap? NameLakhmir Singh & Manjit Kaur - Chemistry
What is saponificatiLakhmir Singh & Manjit Kaur - Chemistry