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A detergent (C(12)H(23)SO(4)^(-)Na^(+)) ...

A detergent `(C_(12)H_(23)SO_(4)^(-)Na^(+))` solution becomes a colloidal sol at a concentration of `10^(-3)` M.On an average `10^(13)` colloidal particles are present in `1 mm^3` What is the average number of ions are contain in one colloidal particle (micelle)?
[Given : `N_A = 6 xx 10^(23)]`

A

`6xx10^(7)`

B

10

C

60

D

40

Text Solution

Verified by Experts

The correct Answer is:
C
No. of sodium lauryl sulphate `(CH_(3) (CH_(2))_(11) SO_(4)^(-)Na^(+))` in 1 litre solution = `10^(-3)xx 6 xx 10^(23) = 6 xx 10^(20)`
No. of sodium lauryl sulphate per `mm^(3)= 6 xx 10^(14)`
No. of colloidal particles per `mm^(3) = 10^(13)`
No. of molecules per colloidal particle = `(6xx10^(14))/(10^(13))=60`
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