UPSC Combined Geo-Scientist, Mains · 2020 · Mains Paper II
Q6(b). Added NaCl lowers the CMC of SDS
Question
Why does the critical micelle concentration of sodium dodecyl sulphate decrease as the concentration of added sodium chloride increases? Explain this effect.
Model answer
The free solution for 2020 answers questions 1, 2, 3, 4, 5, 7, 8, 11, 12 and 13, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.
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CoversCMCsodium dodecyl sulphatesalt effecthead-group repulsion
All parts of Question 6
- 6(a) Molar conductivity of a surfactant solution with concentration5 marks
- 6(b) Added NaCl lowers the CMC of SDS5 marks