मराठी

Cleansing Agents

Advertisements

Topics

Estimated time: 4 minutes
Maharashtra State Board: Class 12

Key Points: Cleansing Agents

Cleansing agents are substances used to remove stain, dirt, or clutter from a surface.

Soaps:

  • Soaps are sodium or potassium salts of long chain fatty acids
  • Obtained by alkaline hydrolysis (saponification) of natural oils and fats with NaOH or KOH
  • Reaction: Natural oil/fat + NaOH/KOH → Soap + Glycerol
  • Example: Sodium stearate (C₁₇H₃₅COONa)
  • Chemically, soaps are triesters of long chain fatty acids and propan-1,2,3-triol (commonly called glycerol or glycerin)

Synthetic Detergents:

Synthetic detergents work in hard water (unlike soaps). Three types:

Type Example Use
Anionic detergents (Sodium lauryl sulphate) \[CH_3(CH_2)_{10}CH_2OSO_3^{\oplus}Na^{\oplus}\] Household detergent, additive in toothpaste
Cationic detergents \[\mathrm{CH_{3}(CH_{2})_{15}-N^{\oplus}(CH_{3})_{3}Br^{\oplus}}\] (Cetyltrimethyl ammonium bromide) Hair conditioner, germicide
Non-ionic detergents

\[CH_{3}\left(CH_{2}\right)_{16}-COO\left(CH_{2}CH_{2}O\right)_{n}CH_{2}CH_{2}OH\] (an ester) Liquid dishwash
liquid detergent

Video Tutorials

We have provided more than 1 series of video tutorials for some topics to help you get a better understanding of the topic.

Series 1


Series 2


Shaalaa.com | Cleansing Action Of Soap

Shaalaa.com


Next video


Shaalaa.com


Cleansing Action Of Soap [00:02:53]
S
Advertisements
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×